WO2022045596A1 - 전지팩 및 이를 포함하는 디바이스 - Google Patents
전지팩 및 이를 포함하는 디바이스 Download PDFInfo
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- WO2022045596A1 WO2022045596A1 PCT/KR2021/009644 KR2021009644W WO2022045596A1 WO 2022045596 A1 WO2022045596 A1 WO 2022045596A1 KR 2021009644 W KR2021009644 W KR 2021009644W WO 2022045596 A1 WO2022045596 A1 WO 2022045596A1
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- WIPO (PCT)
- Prior art keywords
- refrigerant
- opening
- pack
- frame
- battery
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Classifications
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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
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- 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
-
- 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
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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 battery pack and a device including the same, and more particularly, to a battery pack with improved cooling performance and safety, and a device including the same.
- a rechargeable battery capable of charging and discharging is a measure to solve air pollution such as conventional gasoline vehicles using fossil fuels, and electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles ( P-HEV) is being used as a power source, and the need for the development of secondary batteries is increasing.
- EVs electric vehicles
- HEVs hybrid electric vehicles
- P-HEV plug-in hybrid electric vehicles
- lithium secondary batteries do not have much memory effect compared to nickel-based secondary batteries, so charging and discharging are possible freely. , the self-discharge rate is very low and the energy density is high.
- Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively.
- the lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate to which the positive electrode active material and the negative electrode active material are respectively applied with a separator interposed therebetween, and a battery case for sealingly accommodating the electrode assembly together with an electrolyte.
- a lithium secondary battery may 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 the exterior material.
- a battery module in which a plurality of battery cells are electrically connected this is used In such a battery module, a plurality of battery cells are connected in series or parallel to each other to form a battery cell stack, thereby improving capacity and output.
- one or more battery modules may be mounted together with various control and protection systems, such as a battery management system (BMS) and a cooling system, to form a battery pack.
- BMS battery management system
- a secondary battery when the temperature is higher than an appropriate temperature, the performance of the secondary battery may be deteriorated, and in severe cases, there is a risk of explosion or ignition.
- a battery module or battery pack having a plurality of secondary batteries that is, a battery cell
- heat emitted from the plurality of battery cells is added up in a narrow space, so that the temperature may rise more rapidly and severely.
- high output can be obtained, but it is not easy to remove heat generated from the battery cells during charging and discharging. If the heat dissipation of the battery cell is not performed properly, the deterioration of the battery cell is accelerated, the lifespan is shortened, and the possibility of explosion or ignition increases.
- a battery module included in a vehicle battery pack it may be frequently exposed to direct sunlight, and may be subjected to high temperature conditions such as summer or desert areas.
- FIG. 1 is a partial perspective view of a conventional battery pack
- FIG. 2 is a partial perspective view illustrating a mounting method of a battery module included in the battery pack of FIG. 1 .
- a conventional battery pack may include a plurality of battery modules 10 and a pack frame 11 in which the plurality of battery modules are accommodated. For convenience of explanation, only one battery module is shown in FIG. 1 .
- a refrigerant pipe is provided for cooling the battery module 10 , and the refrigerant is supplied through the refrigerant pipe connector 13 connected to the refrigerant pipe.
- This refrigerant is usually a coolant, and a fluid indirect cooling structure in which the temperature is lowered by flowing such coolant inside the battery pack is applied.
- mounting holes are provided at four corners, and the mounting bolts 12 pass through the mounting holes to be fastened to the pack frame 11. .
- Such a mounting coupling may be made for each battery module 10 .
- the cooling configuration such as the coolant tube connector 13 for cooling the battery module 10 and the mounting configuration such as the mounting bolt 12 for mounting the battery module 10 are separate configurations, for each configuration There is a problem that there are many parts and it is complicated.
- An object of the present invention is to provide a battery pack capable of preventing damage due to refrigerant leakage while improving cooling performance and a device including the same.
- a battery pack includes a battery cell stack in which a plurality of battery cells are stacked, a module frame for accommodating the battery cell stack, and a heat sink located under the bottom of the module frame a plurality of battery modules; a pack frame accommodating the plurality of battery modules; and a bolt for transferring refrigerant for fastening the bottom of the module frame, the heat sink, and the pack frame.
- the pack frame includes a pack refrigerant pipe for supplying and discharging refrigerant, and a connection pipe connecting the pack refrigerant pipe and the heat sink to the refrigerant transfer bolt is formed.
- the bolt for transferring the refrigerant includes an opening/closing member for opening or blocking the connection pipe in response to the temperature of the refrigerant.
- the opening/closing member may include a shape memory alloy to respond to the temperature of the refrigerant.
- the refrigerant transfer bolt may include a first opening and a second opening connected to the connection pipe, the first opening may be disposed inside the pack refrigerant pipe, and the second opening may be of the module frame. It may be disposed between the bottom and the heat sink.
- the opening/closing member may control opening and closing of the second opening in response to the temperature of the refrigerant.
- the opening/closing member may include a blocking part for opening or blocking the connection pipe and a spring part connected to the blocking part and including a shape memory alloy.
- the spring part may be deformed in shape in response to the temperature of the refrigerant, and the blocking part may move up and down according to the shape change of the spring part to open or block the connection pipe.
- the spring unit may be a coil-type spring or a plate-shaped spring.
- An opening for the refrigerant may be formed in the pack frame, and the opening for the refrigerant may include a step portion supporting one end of the spring unit.
- the module frame may include a module frame extension formed by extending a portion of a bottom portion of the module frame, and the heat sink may include a heat sink extending from one side of the heat sink to a portion where the module frame extension is located. It may include a part, and the refrigerant transfer bolt may fasten the module frame extension part, the heat sink extension part, and the pack frame.
- An opening for a refrigerant may be formed in the pack frame, a first mounting hole may be formed in the module frame extension portion, and a second mounting hole may be formed in the heat sink extension portion.
- the refrigerant transfer bolt may pass through the first mounting hole, the second mounting hole, and the refrigerant opening.
- the refrigerant transfer bolt may include a first opening and a second opening connected to the connection pipe, the first opening may be disposed inside the pack refrigerant pipe, and the second opening may be of the module frame. It may be disposed between the bottom and the heat sink.
- An opening direction of the first opening may be parallel to a penetrating direction of the connector tube, and an opening direction of the second opening may be perpendicular to a penetrating direction of the connector tube.
- the bolt for transferring the refrigerant may include a body portion in which the connection pipe is formed and a head portion located at an upper end of the body portion.
- the battery pack may further include a gasket enclosing the main body, wherein the gasket is formed between the head portion and a module frame extension formed by extending a portion of a bottom portion of the module frame and between the heat sink and the pack frame. It may be located in at least one of
- Protrusions may be formed on the front and rear surfaces of the battery module, respectively, and the battery pack may further include fixing brackets positioned on the front and rear surfaces of the battery module, respectively, and coupled to the pack frame while enclosing the protrusions. .
- the pack frame may include a support frame for supporting the battery module and a lower frame positioned below the support frame, and the pack refrigerant pipe may be positioned between the support frame and the lower frame.
- the mounting fixation and the pressure sealing are possible at the same time, so that it is possible to reduce the number of parts and simplify the structure.
- the opening and closing member is disposed, so that the opening and closing of the connection pipe formed in the refrigerant transfer bolt can be actively controlled according to the temperature of the refrigerant.
- FIG. 1 is a partial perspective view of a conventional battery pack.
- FIG. 2 is a partial perspective view illustrating a method of mounting a battery module included in the battery pack of FIG. 1 .
- FIG. 3 is a perspective view illustrating a battery module and a pack frame included in a battery pack according to an embodiment of the present invention.
- FIG. 4 is a disassembled perspective view of the fixing bracket for fixing the battery module of FIG. 3 to the pack frame.
- FIG. 5 is an exploded perspective view of the battery module of FIG. 3 .
- FIG. 6 is a partial perspective view showing an enlarged portion “A” of FIG. 3 .
- FIG. 7 is a partial cross-sectional view of a cross-section taken along line B-B' of FIG. 6 .
- FIG. 8 and 9 are partial perspective views showing an enlarged portion "E" of FIG.
- 10A to 10C are views viewed from various angles of a bolt for transferring a refrigerant according to an embodiment of the present invention.
- 11A and 11B are views viewed from various angles of a bolt for transferring a refrigerant and an opening/closing member according to an embodiment of the present invention.
- 12A and 12B are views viewed from various angles of a refrigerant transfer bolt and an opening/closing member according to a modified embodiment of the present invention.
- FIG. 13 is a partial cross-sectional view taken along the cut line C-C' of FIG. 6 .
- FIG. 14 is a partial cross-sectional view taken along the cutting line D-D′ of FIG. 6 .
- a part of a layer, film, region, plate, etc. when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. . Conversely, when we say that a part is “just above” another part, we mean that there is no other part in the middle.
- the reference part means to be located above or below the reference part, and to necessarily mean to be located “on” or “on” in the direction opposite to gravity not.
- planar it means when the target part is viewed from above, and "cross-sectional” means when viewed from the side when a cross-section of the target part is vertically cut.
- FIG. 3 is a perspective view illustrating a battery module and a pack frame included in a battery pack according to an embodiment of the present invention.
- 4 is a disassembled perspective view of the fixing bracket for fixing the battery module of FIG. 3 to the pack frame.
- 5 is an exploded perspective view of the battery module of FIG. 3 .
- the battery pack includes a plurality of battery modules 100 , a pack frame 1100 accommodating the plurality of battery modules 100 , and a bolt for refrigerant delivery. do.
- the battery module 100 includes a battery cell stack 120 in which a plurality of battery cells 110 are stacked, a module frame 200 accommodating the battery cell stack 120 , and a bottom portion 210a of the module frame 200 .
- ) includes a heat sink 300 positioned below. The refrigerant transfer bolt will be described later.
- the battery cell 110 may be a pouch-type battery cell.
- a pouch-type battery cell may be formed by accommodating an electrode assembly in a pouch case of a laminate city including a resin layer and a metal layer, and then thermally sealing the outer periphery of the pouch case.
- the battery cell 110 may be formed in a rectangular sheet-like structure.
- the battery cells 110 may be configured in plurality, and the plurality of battery cells 110 are stacked to be electrically connected to each other to form the battery cell stack 120 .
- a plurality of battery cells 110 may be stacked in a direction parallel to the x-axis.
- the battery cell stack 120 may be a large-area module in which the number of battery cells 110 is greater than that of the prior art. Specifically, 32 to 48 battery cells 110 per battery module 100 may be included. In the case of such a large-area module, the horizontal length of the battery module is increased.
- the horizontal length may mean a length in the direction in which the battery cells 110 are stacked, that is, in a direction parallel to the x-axis.
- the module frame 200 accommodating the battery cell stack 120 may include an upper cover 220 and a U-shaped frame 210 .
- the U-shaped frame 210 may include a bottom portion 210a and two side portions 210b extending upward from both ends of the bottom portion 210a.
- the bottom part 210a may cover the lower surface (-z-axis direction) of the battery cell stack 120
- the side part 210b is both side surfaces (x-axis direction and -x-axis direction) of the battery cell stack 120 . direction) can be covered.
- the upper cover 220 may be formed in a plate-shaped structure that covers the lower surface covered by the U-shaped frame 210 and the upper surface (z-axis direction) other than the both sides.
- the upper cover 220 and the U-shaped frame 210 may form a structure that covers the battery cell stack 120 up, down, left, and right by being coupled by welding or the like in a state in which corresponding corner portions are in contact with each other.
- the battery cell stack 120 may be physically protected through the upper cover 220 and the U-shaped frame 210 .
- the upper cover 220 and the U-shaped frame 210 may include a metal material having a predetermined strength.
- the module frame 200 according to the modified example may be a mono frame in the form of a metal plate in which an upper surface, a lower surface, and both sides are integrated. That is, not the structure in which the U-shaped frame 210 and the upper cover 220 are coupled to each other, but may be manufactured by extrusion molding to have a structure in which the upper surface, the lower surface, and both sides are integrated.
- the end plate 400 may be positioned on the front and rear surfaces (y-axis and -y-axis directions) of the battery cell stack 120 to cover the battery cell stack 120 .
- the end plate 400 may physically protect the battery cell stack 120 and other electrical components from external impact.
- a bus bar frame on which a bus bar is mounted and an insulating cover for electrical insulation may be positioned between the battery cell stack 120 and the end plate 400 .
- the battery module 100 includes a heat sink 300 positioned below the bottom portion 210a of the module frame 200 .
- the bottom part 210a of the module frame 200 may constitute an upper plate of the heat sink 300 , and the recessed part 340 of the heat sink 300 and the bottom part 210a of the module frame 200 may be formed.
- a flow path of the refrigerant may be formed.
- the heat sink 300 forms the skeleton of the heat sink 300 and is a lower plate 310 directly connected to the bottom 210a of the module frame 200 by welding, etc. and a path through which the refrigerant flows. It may include a depression 340 .
- the recessed portion 340 of the heat sink 300 corresponds to a portion in which the lower plate 310 is recessed downward.
- the recessed part 340 may be a U-shaped tube with a cross-section cut in the xz plane perpendicular to the direction in which the coolant flow path extends, and the bottom portion 210a may be located on the open upper side of the U-shaped tube.
- the space between the recessed portion 340 and the bottom portion 210a becomes a region through which the coolant flows, that is, a flow path of the coolant. Accordingly, the bottom portion 210a of the module frame 200 may be in contact with the refrigerant.
- the recessed part 340 of the heat sink 300 there is no particular limitation on the manufacturing method of the recessed part 340 of the heat sink 300, but by providing a structure recessed with respect to the plate-shaped heat sink 300, the U-shaped recessed part 340 with an open upper side may be formed.
- a thermally conductive resin layer including a thermally conductive resin may be positioned between the bottom 210a of the module frame 200 of FIG. 5 and the battery cell stack 120 .
- the thermal conductive resin layer may be formed by applying a thermal resin to the bottom portion 210a, and curing the applied thermal conductive resin.
- the thermally conductive resin may include a thermally conductive adhesive material, and specifically, may include at least one of a silicone material, a urethane material, and an acrylic material.
- the thermally conductive resin may serve to fix one or more battery cells 110 constituting the battery cell stack 120 by being in a liquid phase during application or by curing after application. In addition, heat generated in the battery cell 110 can be quickly transferred to the lower side of the battery module due to its excellent thermal conductivity.
- the battery module 100 implements a cooling integrated structure of the module frame 200 and the heat sink 300 to further improve cooling performance. Since the bottom portion 210a of the module frame 200 serves to correspond to the top plate of the heat sink 300 , a cooling integrated structure may be implemented. Cooling efficiency is increased due to direct cooling, and the heat sink 300 is integrated with the bottom part 210a of the module frame 200 through a structure in which the battery module 100 and the battery module 100 are mounted on the battery pack. Space utilization can be further improved.
- the heat generated in the battery cell 110 is a thermally conductive resin layer (not shown) positioned between the battery cell stack 120 and the bottom part 210a, the bottom part 210a of the module frame 200, It may be transferred to the outside of the battery module 100 through the refrigerant.
- the heat transfer path is simplified and the air gap between each layer can be reduced, so that the cooling efficiency or performance can be increased.
- the bottom portion 210a is constituted by the upper plate of the heat sink 300 and the bottom portion 210a directly contacts the coolant, there is an advantage that more direct cooling is possible through the coolant.
- the height of the battery module 100 is reduced through the removal of the unnecessary cooling structure, so that it is possible to reduce the cost and increase the space utilization. Furthermore, since the battery module 100 can be arranged compactly, the capacity or output of the battery pack including a plurality of the battery modules 100 can be increased.
- the bottom portion 210a of the module frame 200 may be joined to a portion of the lower plate 310 in which the recessed portion 340 is not formed in the heat sink 300 by welding.
- the above-described cooling performance is improved as well as the battery cell stack 120 accommodated in the module frame 200 . It may have the effect of supporting the load of the battery module 100 and reinforcing the rigidity of the battery module 100 .
- the lower plate 310 and the bottom portion 210a of the module frame 200 are sealed through welding, etc., so that the refrigerant can flow without leakage in the depression 340 formed inside the lower plate 310 . there is.
- the recessed portion 340 is formed over the entire area corresponding to the bottom portion 210a of the module frame 200 .
- the recessed portion 340 may be bent at least once to lead from one side to the other.
- the depression 340 is preferably bent several times. As the refrigerant moves from the start point to the end point of the refrigerant flow path formed over the entire area corresponding to the bottom portion 210a of the module frame 200, efficient cooling of the entire area of the battery cell stack 120 can be achieved. .
- the refrigerant is a medium for cooling, and there is no particular limitation, but may be cooling water.
- a protrusion pattern 340D may be formed in the recessed portion 340 of the heat sink 300 according to the present exemplary embodiment.
- the width of the refrigerant passage may be formed to be wider, so that the temperature deviation may be more severe.
- a large-area battery module unlike the case in which about 12 to 24 battery cells are stacked in one battery module, it may include a case in which about 32 to 48 battery cells are stacked in one battery module. there is.
- the protrusion pattern 340D according to the present exemplary embodiment has the effect of substantially reducing the width of the cooling passage, thereby minimizing the pressure drop and reducing the temperature deviation between the widths of the refrigerant passage. Therefore, it is possible to implement a uniform cooling effect.
- FIG. 6 is a partial perspective view showing an enlarged portion “A” of FIG. 3 .
- FIG. 7 is a partial cross-sectional view of a cross-section taken along line B-B' of FIG. 6 .
- the battery pack according to the present embodiment includes a bolt 700 for transferring refrigerant that fastens the bottom portion 210a of the module frame 200 , the heat sink 300 , and the pack frame 1100 . ) is included.
- the pack frame 1100 may include the refrigerant openings 1150 and 1160 formed in the pack refrigerant pipes 1130 and 1140 and the pack refrigerant pipes 1130 and 1140 for supply and discharge of refrigerant.
- the pack refrigerant pipes 1130 and 1140 may include a pack refrigerant supply pipe 1130 for supplying a refrigerant and a pack refrigerant discharge pipe 1140 for discharging the refrigerant.
- the refrigerant openings 1150 and 1160 may include an opening 1150 for supplying refrigerant connected to the pack refrigerant supply pipe 1130 and an opening 1160 for discharging the refrigerant connected to the pack refrigerant discharge pipe 1140 .
- the pack frame 1100 may include a support frame 1110 for supporting the battery module 100 and a lower frame 1120 positioned below the support frame 1110 .
- the pack refrigerant supply pipe 1130 and the pack refrigerant discharge pipe 1140 may be located between the support frame 1110 and the lower frame 1120, and more specifically, the pack refrigerant supply pipe 1130 and the pack refrigerant discharge pipe 1140. is positioned directly below the support frame 1110 and may have a configuration integrated with the support frame 1110 .
- the module frame 200 may include a module frame extension part 211 formed by extending a part of the bottom part 210a of the module frame 200 .
- the heat sink 300 may include a heat sink extension 311 extending from one side of the heat sink 300 to a portion where the module frame extension 211 is located.
- the module frame extension 211 and the heat sink extension 311 may have shapes corresponding to each other, and may be formed to extend past the end plate 400 .
- a first mounting hole 211H may be formed in the module frame extension 211
- a second mounting hole 311H may be formed in the heat sink extension 311 .
- the refrigerant transfer bolt 700 fastens the module frame extension part 211, the heat sink extension part 311, and the pack frame 1100. Specifically, the refrigerant transfer bolt 700 is the first The first mounting hole 211H, the second mounting hole 311H, and the refrigerant supply opening 1150 of the pack frame 1100 are sequentially passed through and fastened.
- the refrigerant transfer structure through the refrigerant transfer bolt 700 may also be applied to the pack refrigerant discharge pipe 1140 .
- FIG. 8 and 9 are partial perspective views showing an enlarged portion "E" of FIG. 10A to 10C are views viewed from various angles of a bolt for transferring a refrigerant according to an embodiment of the present invention.
- 11A and 11B are views viewed from various angles of a bolt for transferring a refrigerant and an opening/closing member according to an embodiment of the present invention.
- FIG. 8 shows a state in which the refrigerant flow path is opened by the opening/closing member 900a
- FIG. 9 shows a state in which the refrigerant flow path is blocked by the opening/closing member 900a.
- FIGS. 10A to 10C show the refrigerant transfer bolt 700 with the opening/closing member 900a removed for convenience of explanation
- FIG. 10A is a perspective view of the refrigerant transfer bolt 700
- FIG. 10B is a plan view of the refrigerant transfer bolt 700 of FIG. 10A viewed from below
- FIG. 10C is a side view viewed from the side after the refrigerant transfer bolt 700 of FIG. 10A is turned over.
- FIGS. 11A and 11B show a state in which the opening/closing member 900a is disposed on the refrigerant transfer bolt 700 .
- connection pipe 713 connecting the pack refrigerant pipes 1130 and 1140 and the heat sink 300 to the refrigerant transfer bolt 700 according to the present embodiment is formed, and the refrigerant
- the transmission bolt 700 includes an opening/closing member (900a, opening-closing member) for opening or blocking the connection pipe 713 in response to the temperature of the refrigerant.
- 8 shows a connection pipe 713 of the refrigerant transfer bolt 700 connecting the pack refrigerant supply pipe 1130 and the heat sink 300 .
- the bolt 700 for refrigerant delivery may include a body portion 710 in which a connection pipe 713 is formed, and a head portion 720 located at an upper end of the body portion 710 .
- a screw thread may be formed on the outer circumferential surface of the main body 710 in the form of a column having diameters corresponding to the inner diameters of the first and second mounting holes 211H and 311H.
- a thread may also be formed on the inner surface of the refrigerant supply opening 1150 , so that the main body 710 may be fastened to the pack frame 1100 .
- the head unit 720 is configured to have a larger diameter than the body unit 710 , and the module frame extension unit 211 and the heat sink extension unit 311 may be in close contact with each other.
- the refrigerant transfer bolt 700 may include a first opening 711 and a second opening 712 connected to the connection pipe 713 and formed in the body portion 710 .
- the first opening 711 may be disposed inside the pack refrigerant supply pipe 1130
- the second opening 712 may be disposed between the bottom part 210a of the module frame 200 and the heat sink 300 .
- the opening direction of the first opening 711 may be parallel to the penetration direction of the connection pipe 713
- the opening direction of the second opening 712 may be perpendicular to the penetration direction of the connection pipe 713 .
- the first opening 711 may be located at one end of the main body 710 while being connected to the connecting pipe 713 , and the second opening 712 is formed in plurality along the outer circumferential surface of the main body 710 to form a connecting pipe. (713) can be followed.
- the refrigerant that has moved through the pack refrigerant supply pipe 1130 passes through the first opening 711, the connecting pipe 713, and the second opening 712 in sequence to be introduced between the bottom part 210a and the heat sink 300. there is. As described above, the introduced refrigerant may move along the recessed portion 340 of the heat sink 300 to cool the battery module 100 .
- the refrigerant transfer bolt 700 not only serves to mount and fix the module frame 200 and the heat sink 300 to the pack frame 1100, but also provides a refrigerant at the bottom of the battery module 100. It can function as a supply route.
- the bottom portion 210a, the heat sink 300, and the pack refrigerant supply pipe 1130 are strongly adhered to each other by the fastening force of the bolt 700 for refrigerant delivery, the sealing property is improved, and there is a possibility of refrigerant leakage therebetween. can reduce That is, it is possible to simultaneously perform mounting fixation, pressure sealing, and refrigerant transfer, thereby reducing the number of parts and simplifying the structure.
- the opening/closing member 900a opens or blocks the connection pipe 713 in response to the temperature of the refrigerant.
- the opening/closing member 900a may respond to the temperature of the refrigerant, including the shape memory alloy, and may control the opening and closing of the second opening 712 .
- the degree of opening and closing the flow rate of the refrigerant flowing through the heat sink 300 may be adjusted.
- the shape memory alloy may be an alloy having a property of being deformed below the transition temperature, and returning to the previous deformation when the transition temperature is higher.
- the opening and closing member 900a may include a blocking portion 910a for opening or blocking the connection pipe 713 and a spring portion 920a connected to the blocking portion 910a and including a shape memory alloy.
- the blocking part 910a may have a shape surrounding the outer circumferential surface of the main body 710 in which the second opening 712 is formed, and a spring-shaped spring part 920a may be connected under the blocking part 910a.
- the spring portion 920a may include a shape memory alloy, and may be deformed in shape in response to the temperature of the coolant.
- the shape of the spring may increase or decrease in the vertical direction according to the temperature of the refrigerant.
- the blocking part 910a may move up and down to open or block the connection pipe 713 , in particular, the second opening 712 .
- FIG. 8 shows a state in which the spring part 920a is reduced in the vertical direction and the blocking part 910a moves downward, and the second opening 712 is opened.
- FIG. 9 shows a state in which the spring part 920a is extended in the vertical direction to move the blocking part 910a upward, and the second opening 712 is blocked.
- the pack frame 1100 may include the refrigerant openings 1150 and 1160 formed in the pack refrigerant pipes 1130 and 1140 and the pack refrigerant pipes 1130 and 1140.
- the refrigerant openings 1150 and 1160 may include a step portion 1150S supporting one end of the spring portion 920a.
- the refrigerant supply opening 1150 through which the refrigerant transfer bolt 700 passes may include a stepped portion 1150S having a stepped structure.
- a spring portion 920a may be disposed on the upper surface of the stepped portion 1150S.
- the battery pack according to this embodiment applies an opening/closing member 900a using a shape memory alloy that responds to a predetermined temperature to the refrigerant transfer bolt 700, thereby actively controlling the supply and blocking of the refrigerant according to the temperature of the refrigerant. Also, the flow rate of the refrigerant can be adjusted according to the degree of opening and closing. It is possible to form a refrigerant circulation system in which the flow rate is easily controlled according to the temperature of the battery module without a separate complicated control device.
- the battery pack according to the present embodiment may further include a gasket 600 surrounding the body portion 710 of the bolt 700 for transferring the refrigerant.
- the gasket 600 may be positioned at least one of between the head unit 720 and the module frame extension unit 211 and between the heat sink 300 and the pack frame 1100 . Leakage of the refrigerant may be prevented through the gasket 600 .
- the first mounting hole 211H, the second mounting hole 311H, and the refrigerant discharge opening 1160 of the pack frame 1100 are also the refrigerant transfer bolt 700 according to the present embodiment.
- all of the pack refrigerant pipes 1130 and 1140 may be connected to the heat sink 300 through the refrigerant transfer bolt 700 , the first mounting hole 211H, and the second mounting hole. (311H) and the refrigerant transfer bolt 700 may be composed of a plurality.
- the other second mounting hole ( 311H) and the refrigerant transfer bolt 700 may be discharged to the pack refrigerant discharge pipe 1140 .
- the spring part 920a may be a coil-type spring.
- the coil-type spring may be deformed such as by compression in the vertical direction in response to the temperature of the refrigerant while surrounding the outer circumferential surface of the body portion 710 of the bolt 700 for transferring the refrigerant.
- FIGS. 12A and 12B are views viewed from various angles of a refrigerant transfer bolt and an opening/closing member according to a modified embodiment of the present invention.
- the opening/closing member 900b may include a blocking part 910b and a spring part 920b.
- the blocking part 910b may be similar to or the same as the configuration described above, but the spring part 920b may be a plate-shaped spring.
- the plurality of plate-shaped springs may be disposed to be spaced apart at regular intervals along the blocking portion 910b, and may be deformed such as by compression in the vertical direction in response to the temperature of the refrigerant.
- the spring parts 920a and 920b according to the present embodiments as described above may have an exemplary structure, and if the blocking parts 910a and 910b can be moved in the vertical direction, there is no particular limitation in the form thereof.
- FIG. 13 is a partial cross-sectional view taken along the cutting line C-C' of FIG. 6, and FIG. 14 is a partial cross-sectional view of the cross-section taken along the cutting line D-D' of FIG. 6 .
- protrusions 410 are formed on the front and rear surfaces of the battery module 100 according to the present embodiment, respectively.
- the front and rear end plates 400 of the battery module 100 may be positioned, and the protrusion 410 may be formed on the end plate 400 .
- the protrusion 410 may have a structure that protrudes in a direction perpendicular to the stacking direction of the battery cells 110 (a direction parallel to the y-axis). That is, the protrusion 410 formed on the front surface of the battery module 100 may protrude in the y-axis direction, and the protrusion 410 formed on the rear surface of the battery module 100 may protrude in the -y-axis direction. .
- the protrusion 410 may be formed at a lower edge of the front surface of the battery module 100 and a lower edge of the rear surface of the battery module 100 , respectively.
- two protrusions 410 spaced apart from each other may be formed for each of the front and rear surfaces of the battery module 100 .
- the fixing bracket 500 may be coupled to the pack frame 1100 while surrounding the protrusion 410 .
- the protrusion 410 is formed to protrude from the end plate 400 and has an upper surface and three side surfaces, and the fixing bracket 500 includes a fixing portion 510 surrounding the upper surface and one side of the protrusion 410 .
- the fixing part 510 may further wrap the other two sides of the protrusion 410 .
- the battery pack according to the present embodiment may include a bracket bolt B1 passing through the pack frame hole 1111H and the bracket hole 500H, and a bracket nut N1 coupled to the bracket bolt B1.
- the bracket hole 500H and the pack frame hole 1111H may be positioned to correspond to each other, and the bracket bolt B1 may pass through the pack frame hole 1111H and the bracket hole 500H to be upright. After that, the bracket bolt B1 may be coupled to the bracket nut N1 to fix the fixing bracket 500 to the pack frame 1100 .
- the pack frame hole 1111H, the bracket hole 500H, the bracket bolt B1, and the bracket nut N1 are each configured in plurality. appearance is shown
- Two fixing brackets 500 disposed to face each other with the battery module 100 interposed therebetween surround the protrusion 410 of the battery module 100, and pack through the bracket bolt B1 and the bracket nut N1. Since it is coupled to the frame 1100 , the battery module 100 may be accommodated and fixed to the pack frame 1100 .
- the battery pack according to the present embodiment may further include an insulating member 800 positioned between the protrusion 410 and the pack frame 1100 .
- the insulating member 800 may be a pad-shaped member exhibiting electrical insulation. Galvanic corrosion may occur between the end plate 400 and the pack frame 1100 due to contact of dissimilar materials. By disposing the insulating member 800 therebetween, the occurrence of galvanic corrosion may be prevented.
- the fixing bracket 500 may include a cover part 520 covering the module frame extension part 211 .
- the fastening structure of the bracket bolt B1 and the bracket nut N1 may be respectively located on the left and right sides of the cover part 520 .
- the head portion 720 of the bolt 700 for transferring the refrigerant may be sealed while being surrounded by the end plate 400 , the module frame extension portion 211 , and the cover portion 520 .
- the cover part 520 By sealing it through the cover part 520 , it is possible to block the leaked refrigerant from penetrating into surrounding parts. That is, the cover part 520 itself may perform a function of preventing leakage of the refrigerant.
- One or more battery modules according to the present embodiment described above may be mounted together with various control and protection systems such as a battery management system (BMS) and a cooling system to form a battery pack.
- BMS battery management system
- a cooling system to form a battery pack.
- the battery module or battery pack may be applied to various devices. Specifically, it may be applied to transportation means such as electric bicycles, electric vehicles, hybrids, etc., but is not limited thereto, and may be applied to various devices capable of using a secondary battery.
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Abstract
Description
Claims (15)
- 복수의 전지셀이 적층된 전지셀 적층체, 상기 전지셀 적층체를 수납하는 모듈 프레임 및 상기 모듈 프레임의 바닥부 아래에 위치하는 히트 싱크를 포함하는 복수의 전지 모듈;상기 복수의 전지 모듈을 수납하는 팩 프레임; 및상기 모듈 프레임의 바닥부, 상기 히트 싱크 및 상기 팩 프레임을 체결하는 냉매전달용 볼트를 포함하고,상기 팩 프레임은, 냉매의 공급과 배출을 위한 팩 냉매관을 포함하며,상기 냉매전달용 볼트에 상기 팩 냉매관 및 상기 히트 싱크를 연결하는 연결관이 형성되고,상기 냉매전달용 볼트는, 냉매의 온도에 반응하여 상기 연결관을 개방하거나 차단하는 개폐 부재를 포함하는 전지팩.
- 제1항에서,상기 개폐 부재는 형상기억합금을 포함하여 상기 냉매의 온도에 반응하는 전지팩.
- 제1항에서,상기 냉매전달용 볼트는, 상기 연결관과 이어지는 제1 개구 및 제2 개구를 포함하고,상기 제1 개구는 상기 팩 냉매관 내부에 배치되며,상기 제2 개구는 상기 모듈 프레임의 바닥부와 상기 히트 싱크 사이에 배치되고,상기 개폐 부재는 상기 냉매의 온도에 반응하여, 상기 제2 개구의 개폐를 조절하는 전지팩.
- 제1항에서,상기 개폐 부재는, 상기 연결관을 개방하거나 차단하는 차단부 및 상기 차단부와 연결되고 형상기억합금을 포함하는 스프링부를 포함하는 전지팩.
- 제4항에서,상기 스프링부는 상기 냉매의 온도에 반응하여 형상이 변형되고,상기 스프링부의 형상 변형에 따라 상기 차단부가 상하로 움직여, 상기 연결관을 개방하거나 차단하는 전지팩.
- 제4항에서,상기 스프링부는 코일형 스프링 또는 판상형 스프링인 전지팩.
- 제4항에서,상기 팩 프레임에 냉매용 개구가 형성되고,상기 냉매용 개구는 상기 스프링부의 일 단부를 받치는 단차부를 포함하는 전지팩.
- 제1항에서,상기 모듈 프레임은, 상기 모듈 프레임의 바닥부 일부가 연장되어 형성된 모듈 프레임 연장부를 포함하고,상기 히트 싱크는, 상기 히트 싱크의 일 변으로부터 상기 모듈 프레임 연장부가 위치한 부분으로 연장된 히트 싱크 연장부를 포함하며,상기 냉매전달용 볼트는 상기 모듈 프레임 연장부, 상기 히트 싱크 연장부 및 상기 팩 프레임을 체결하는 전지팩.
- 제8항에서,상기 팩 프레임에 냉매용 개구가 형성되고,상기 모듈 프레임 연장부에 제1 마운팅 홀이 형성되며,상기 히트 싱크 연장부에 제2 마운팅 홀이 형성되고,상기 냉매전달용 볼트가 상기 제1 마운팅 홀, 상기 제2 마운팅 홀 및 상기 냉매용 개구를 통과하는 전지팩.
- 제1항에서,상기 냉매전달용 볼트는, 상기 연결관과 이어지는 제1 개구 및 제2 개구를 포함하고,상기 제1 개구는 상기 팩 냉매관 내부에 배치되며,상기 제2 개구는 상기 모듈 프레임의 바닥부와 상기 히트 싱크 사이에 배치되고,상기 제1 개구의 개구 방향은 상기 연결관의 관통 방향과 평행하고,상기 제2 개구의 개구 방향은 상기 연결관의 관통 방향과 수직한 전지팩.
- 제1항에서,상기 냉매전달용 볼트는 상기 연결관이 형성된 본체부 및 상기 본체부의 상단에 위치한 헤드부를 포함하는 전지팩.
- 제11항에서,상기 본체부를 둘러싸는 가스켓을 더 포함하고,상기 가스켓은, 상기 헤드부와 상기 모듈 프레임의 바닥부 일부가 연장되어 형성된 모듈 프레임 연장부 사이 및 상기 히트 싱크와 상기 팩 프레임 사이 중 적어도 한 곳에 위치하는 전지팩.
- 제1항에서,상기 전지 모듈의 전면 및 후면에 각각 돌출부가 형성되며,상기 전지 모듈의 전면 및 후면에 각각 위치하고, 상기 돌출부를 감싸면서 상기 팩 프레임에 결합되는 고정 브라켓을 더 포함하는 전지팩.
- 제1항에서,상기 팩 프레임은, 상기 전지 모듈을 받치는 받침 프레임 및 상기 받침 프레임의 아래에 위치한 하부 프레임를 포함하고,상기 팩 냉매관은 상기 받침 프레임과 상기 하부 프레임 사이에 위치하는 전지팩.
- 제1항에 따른 전지팩을 더 포함하는 디바이스.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21861895.7A EP4120440A4 (en) | 2020-08-24 | 2021-07-26 | BATTERY PACK AND DEVICE THEREOF |
| CN202180030497.XA CN115428232B (zh) | 2020-08-24 | 2021-07-26 | 电池组和包括该电池组的装置 |
| US17/919,716 US12512527B2 (en) | 2020-08-24 | 2021-07-26 | Battery pack and device including the same |
| JP2022552223A JP7384532B2 (ja) | 2020-08-24 | 2021-07-26 | 電池パックおよびこれを含むデバイス |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2020-0106097 | 2020-08-24 | ||
| KR1020200106097A KR102767704B1 (ko) | 2020-08-24 | 2020-08-24 | 전지팩 및 이를 포함하는 디바이스 |
Publications (1)
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|---|---|
| WO2022045596A1 true WO2022045596A1 (ko) | 2022-03-03 |
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| PCT/KR2021/009644 Ceased WO2022045596A1 (ko) | 2020-08-24 | 2021-07-26 | 전지팩 및 이를 포함하는 디바이스 |
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| US (1) | US12512527B2 (ko) |
| EP (1) | EP4120440A4 (ko) |
| JP (1) | JP7384532B2 (ko) |
| KR (1) | KR102767704B1 (ko) |
| CN (1) | CN115428232B (ko) |
| WO (1) | WO2022045596A1 (ko) |
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| KR102752852B1 (ko) * | 2022-12-12 | 2025-01-09 | 현대트랜시스 주식회사 | 차량용 파워 모듈 장치 |
| KR102746919B1 (ko) * | 2022-12-12 | 2024-12-27 | 현대트랜시스 주식회사 | 차량용 파워 모듈 장치 |
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| KR102655349B1 (ko) * | 2018-06-28 | 2024-04-05 | 에스케이온 주식회사 | 냉각장치를 구비한 배터리 팩 |
| DE102018217102A1 (de) * | 2018-10-05 | 2020-04-09 | Mahle International Gmbh | Akkumulatoranordnung |
| KR102683482B1 (ko) | 2018-12-14 | 2024-07-09 | 주식회사 엘지에너지솔루션 | 전지 팩 |
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2020
- 2020-08-24 KR KR1020200106097A patent/KR102767704B1/ko active Active
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2021
- 2021-07-26 JP JP2022552223A patent/JP7384532B2/ja active Active
- 2021-07-26 US US17/919,716 patent/US12512527B2/en active Active
- 2021-07-26 WO PCT/KR2021/009644 patent/WO2022045596A1/ko not_active Ceased
- 2021-07-26 CN CN202180030497.XA patent/CN115428232B/zh active Active
- 2021-07-26 EP EP21861895.7A patent/EP4120440A4/en active Pending
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| KR101634947B1 (ko) * | 2006-10-13 | 2016-07-01 | 에네르델, 인코포레이티드 | 온도 제어 장치를 구비한 배터리 조립체 |
| JP2013016301A (ja) * | 2011-07-01 | 2013-01-24 | Hitachi Vehicle Energy Ltd | 蓄電モジュール |
| JP2019516225A (ja) * | 2016-10-31 | 2019-06-13 | エルジー・ケム・リミテッド | バッテリーのエッジ面に直接冷却方式を適用したバッテリーパック |
| KR20200021608A (ko) * | 2018-08-21 | 2020-03-02 | 에스케이이노베이션 주식회사 | 배터리 모듈 및 이를 포함하는 배터리 팩 |
| JP2020043004A (ja) * | 2018-09-12 | 2020-03-19 | 株式会社デンソー | 電池スタック |
Non-Patent Citations (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20220025420A (ko) | 2022-03-03 |
| EP4120440A1 (en) | 2023-01-18 |
| EP4120440A4 (en) | 2024-02-21 |
| JP7384532B2 (ja) | 2023-11-21 |
| US20230163376A1 (en) | 2023-05-25 |
| KR102767704B1 (ko) | 2025-02-12 |
| US12512527B2 (en) | 2025-12-30 |
| JP2023516316A (ja) | 2023-04-19 |
| CN115428232A (zh) | 2022-12-02 |
| CN115428232B (zh) | 2025-06-03 |
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