WO2023158186A1 - 절연유를 포함하는 전지모듈 및 이를 포함하는 전지팩 - Google Patents
절연유를 포함하는 전지모듈 및 이를 포함하는 전지팩 Download PDFInfo
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- WO2023158186A1 WO2023158186A1 PCT/KR2023/002130 KR2023002130W WO2023158186A1 WO 2023158186 A1 WO2023158186 A1 WO 2023158186A1 KR 2023002130 W KR2023002130 W KR 2023002130W WO 2023158186 A1 WO2023158186 A1 WO 2023158186A1
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- Prior art keywords
- battery
- connector
- module
- cell stack
- battery cell
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- 238000001816 cooling Methods 0.000 claims abstract description 49
- 230000005684 electric field Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
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- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
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- 229910045601 alloy Inorganic materials 0.000 description 1
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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
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Images
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
- H01M10/42—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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
-
- 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
- H01M50/253—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders adapted for specific cells, e.g. electrochemical cells operating at high temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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 module including insulating oil and a battery pack including the same. Specifically, it relates to a battery module including insulating oil that simplifies the structure of the battery module and is injected into a sealed module housing to directly contact the battery cell, and a battery pack including the same.
- Lithium secondary batteries are not only used as an energy source for wireless mobile devices, which are small and multifunctional products, or wearable devices worn on the body, but also for existing gasoline and diesel vehicles that cause air pollution. It is also used as an energy source or power storage device for electric vehicles and hybrid electric vehicles, which are proposed as alternatives.
- a heat transfer member made of a material with high thermal conductivity, a heat sink, and a cooling fin are provided in the battery pack to transfer heat from the battery cell to the outside of the battery pack. discharge with
- FIG. 1 is an exploded perspective view of a conventional battery pack.
- the battery pack includes a battery module 10, a cross beam 30 positioned between the battery modules 10, a pack tray 40 on which the battery module 10 and the cross beam 30 are mounted, A lower cover 70 positioned below the pack tray 40, a pack frame 50 disposed to surround the circumference of the battery module 10, a cooling member 60 for cooling the battery module, and a battery module 10 ) and a pack cover 20 located on top of the.
- a cross beam 30, a pack tray 40, a pack frame 50, a pack cover 20 and a lower cover ( 70) were required.
- Patent Document 1 discloses a battery module accommodating insulating oil and a plurality of battery cells, and since the battery cells are completely immersed in insulating oil, the temperature of the battery cells can be prevented from rapidly increasing.
- the battery module of Patent Document 1 includes a heat pipe for absorbing heat from the insulating oil when the temperature of the insulating oil rises, and a heat dissipation block and cooling fins for discharging the absorbed heat.
- the lithium secondary battery is used as an energy source of large capacity and high output
- a technology for a battery module having improved energy density and improved safety by securing a cooling effect of the battery cell is required.
- Patent Document 1 Korean Patent Registration No. 1834846 (2018.02.27)
- the present invention is to solve the above problems, and to improve the cooling efficiency by directly cooling the battery cell, and to omit parts of the battery module by providing a high-rigidity module housing, thereby improving the energy density of the battery module, and the same It is an object of the present invention to provide a battery pack comprising
- a battery module according to the present invention for achieving this object is a battery cell stack composed of a plurality of battery cells, a module housing accommodating one or more of the battery cell stacks disposed along the electric field direction, and electrically connecting the battery modules.
- HV connector High Voltage Connector
- LV assembly Low Voltage Assembly
- insulating oil for cooling the plurality of battery cells, and cooling for entering and exiting the insulating oil.
- a port is included, and the insulating oil may directly cool the plurality of battery cells while flowing inside the module housing.
- the module housing may include a top surface, a bottom surface, a first side surface, and a second side surface
- the HV connector may include a first HV connector positioned on the first side surface and a second HV connector positioned on the second side surface.
- the battery cell stack includes a first battery cell stack and a second battery cell stack, and a first electrode terminal of the first battery cell stack and a second electrode terminal of the second battery cell stack are connected to the first HV connector.
- the second electrode terminal of the first battery cell stack and the first electrode terminal of the second battery cell stack may be connected to the second HV connector.
- Through-holes are formed in the lower part of the lower surface of the module housing where the first HV connector and the second HV connector are connected to the first battery cell stack and the second battery cell stack, and a sealing member is attached to the through-hole to seal it. It can be.
- a connection portion where the HV connector, the LV assembly, and the cooling port are connected to the module housing may include a sealing member to prevent leakage of the insulating oil.
- the LV assembly may include an LV connector.
- the LV assembly may further include at least one selected from the group consisting of a flexible printed circuit (FPC), a printed circuit board (PCB), and a cell management controller (CMC).
- FPC flexible printed circuit
- PCB printed circuit board
- CMC cell management controller
- the present invention provides a battery pack including the battery module, wherein the battery pack includes a plurality of battery modules disposed adjacent to side surfaces of a module housing, and a BDU (Battery Disconnect Unit) disposed on one side of the plurality of battery modules. ), a battery pack frame surrounding the plurality of battery modules and the BDU, wherein the plurality of battery modules are electrically connected to adjacent battery modules through HV connectors, and the BDU is It can be connected with HV connector.
- the battery pack includes a plurality of battery modules disposed adjacent to side surfaces of a module housing, and a BDU (Battery Disconnect Unit) disposed on one side of the plurality of battery modules. ), a battery pack frame surrounding the plurality of battery modules and the BDU, wherein the plurality of battery modules are electrically connected to adjacent battery modules through HV connectors, and the BDU is It can be connected with HV connector.
- BDU Battery Disconnect Unit
- the module housing may include screw fastening parts on first and second sides, and a plurality of battery modules may be connected to each other by screws coupled to the screw fastening parts.
- the plurality of battery modules include an LV assembly coupled to all battery cell stacks, and the LV assembly may be connected to a battery management system (BMS).
- BMS battery management system
- the inlet and outlet passages of the insulating oil may be configured in at least one of a series connection structure and a parallel connection structure between the plurality of battery modules.
- the plurality of battery modules may have a structure in which upper and lower surfaces of the module housing are exposed while being mounted on the battery pack frame.
- the battery pack frame may have openings for connection at positions corresponding to HV connectors and LV assemblies mounted on a plurality of battery modules.
- the battery pack frame may be composed of a first member, a second member, a third member, and a fourth member connected to be perpendicular to each other.
- the present invention can also be provided in the form of various combinations of the above configurations.
- the present invention can directly cool the battery cell by injecting insulating oil into the battery module, and thus the cooling efficiency is improved.
- cooling members other than insulating oil are omitted, a battery module and battery pack realizing light weight and high energy density can be provided.
- FIG. 1 is an exploded perspective view of a conventional battery pack.
- FIG. 2 is a perspective view of a battery module according to the present invention.
- FIG 3 is a planar perspective view showing a connection state through an HV connector between a plurality of battery modules.
- FIG. 4 is a partially enlarged view of the HV connector of FIG. 2;
- FIG. 5 is an exploded perspective view of a portion of the battery module of FIG. 2;
- FIG. 6 is a perspective view of a portion of the battery module of FIG. 2;
- FIG. 7 is an enlarged view of a portion to which a cooling port is coupled in the battery module of FIG. 2 .
- FIG. 8 is a perspective view of a plurality of battery modules according to the present invention.
- FIG. 9 is a front view of a module housing according to one embodiment.
- FIG. 10 is a front view of a module housing according to another embodiment.
- FIG. 11 is a perspective view of a battery pack according to the present invention.
- FIG. 2 is a perspective view of a battery module according to the present invention
- FIG. 3 is a planar perspective view showing a connection state between a plurality of battery modules through an HV connector.
- the battery module according to the present invention includes a battery cell stack 100 composed of a plurality of battery cells and two battery cell stacks 100 arranged side by side along the electric field direction L.
- a module housing 200 for accommodating, an HV connector 300 for electrically connecting battery modules, an LV assembly 400 for sensing voltage and temperature of a plurality of battery cells, insulating oil for cooling a plurality of battery cells ( 600), and a cooling port 500 for entering and exiting the insulating oil 600.
- the configuration of the LV assembly 400 may be formed in various ways according to the configuration of the battery module, and if configured to sense the voltage and temperature of the battery cell by connecting the battery cell stack and the BMS, the components constituting the LV assembly It does not limit the type.
- the LV assembly includes a bus bar connected to an electrode lead of a battery cell stack, a flexible printed circuit (FPC) coupled to the bus bar, a printed circuit board (PCB) connected to the FPC, and a CMC connected to the PCB ( Cell Management Controller) and LV connector (Low Voltage Connector) combined with CMC.
- FPC flexible printed circuit
- PCB printed circuit board
- CMC Cell Management Controller
- LV connector Low Voltage Connector
- the BMS can manage battery cells to prevent overcharging and maintain a uniform voltage, and the BDU can stably supply power to battery cells or cut off power.
- Configurations of the PCB and CMC may be referred to in FIG. 5 .
- a plurality of battery modules constituting the battery pack are connected to each other through an LV line connected to the LV connector, and the LV line is connected to the BMS. In this way, since the connection between the battery cell stack and the BMS is formed through the LV assembly, sensing of voltage and temperature of the battery cells and control and management thereof can be performed.
- the present invention injects the insulating oil 600 into the module case through the cooling port 500, the insulating oil 600 can directly contact the battery cell. Therefore, when insulating oil having a low temperature is injected into the module housing, the insulating oil can directly cool the plurality of battery cells while flowing inside the module housing. Compared to cooling, the cooling efficiency can be significantly improved.
- the present invention has a structure in which insulating oil is introduced into and discharged into the module housing through the cooling port, and the remaining parts except for the cooling port must be sealed so that the insulating oil does not leak.
- parts coupled to the module housing, where the HV connector 300, the LV assembly 400, and the cooling port 500 are connected may be coupled by adding a sealing member to prevent leakage of insulating oil.
- the HV connector 300, the LV assembly 400, and the cooling port 500 may be coupled to the module housing in a state in which O-rings are added.
- the module housing 200 has a monoframe structure in which four rectangular surfaces are arranged perpendicular to each other, and the upper surface 231, the lower surface 232, the first side surface 233 and the second side surface 234 are formed.
- the HV connector 300 includes a first HV connector 300a located on the first side surface 233 and a second HV connector 300b located on the second side surface 234.
- the present invention may be arranged so that two battery cell stacks are located along the electric field direction in a module housing having a long length in the electric field direction, and the battery module of FIG. 3 includes a first battery cell stack 110 and a second battery cell stack. (120).
- An HV bus bar is disposed in a space between the first battery cell stack 110 and the second battery cell stack 120 facing each other as the center of the module housing in the entire length direction, and the first electrode terminal and the second battery cell stack of each battery cell stack The electrode terminal extends in the direction of the HV bus bar and is coupled with the HV bus bar.
- the first electrode terminal 111 of the first battery cell stack 110 and the second electrode terminal 122 of the second battery cell stack 120 are connected to the first HV connector 300a, and the first battery The second electrode terminal 112 of the cell stack 110 and the first electrode terminal 121 of the second battery cell stack 120 are connected to the second HV connector 300b, and the first electrode terminal and the second electrode The terminals may be connected to HV connectors via HV busbars.
- the first electrode terminals 111 and 121 are terminals formed by combining the electrode leads of the first electrode constituting the battery cell stack, and the second electrode terminals 112 and 122 are the first electrode terminals constituting the battery cell stack.
- the electrode leads of the two electrodes are combined to form a terminal.
- the first electrode and the second electrode are electrodes having different polarities, and may be an anode and a cathode, or a cathode and an anode, respectively.
- a plurality of battery modules constituting a battery pack are disposed adjacent to each other so that electrical connection can be made between them.
- the first battery module 701 and the second battery module 702 are adjacent to each other.
- the first battery module 701 and the second battery module 702 may be electrically connected through the HV connector 300 . That is, electrical connection can be made by directly connecting the second HV connector 300b of the first battery module 701 and the first HV connector 300a of the second battery module 702 .
- the second HV connector 300b of the first battery module 701 and the first HV connector 300a of the second battery module 702 can be directly coupled to each other, so that the second HV connector of the first battery module 701 (300b) and the first HV connector (300a) of the second battery module 702 may be located adjacent.
- the present invention does not include members such as upper and lower covers of the battery pack outside the upper and lower surfaces 231 and 232 of the module housing 200, and the upper surface 231 of the module housing in the assembled state ) And the lower surface 232 is exposed.
- first HV connector 300a and the second HV connector 300b are disposed to penetrate the module housing 200 and are mounted on the module housing 200, and the first HV connector 300a and the second HV connector 300b are disposed. This part must be completely sealed. Therefore, after the first HV connector 300a and the second HV connector 300b are coupled to the first electrode terminal and the second electrode terminal, the battery cell stacks cannot be accommodated in the module housing.
- the present invention accommodates the battery cell stacks in the module housing and inserts the first HV connector 300a and the second HV connector 300b from the outside to the inside of the module housing, and the first HV connector 300a and the second HV connector In the coupling portion of (300b), the first electrode terminal and the second electrode terminal are coupled.
- the first HV connector 300a and the second HV connector 300b of the lower surface 232 of the module housing 200 and the first battery cell stack 110 and the second battery cell stack 120 are connected.
- a through hole 210 is formed in the lower part of the connection part.
- the first electrode terminal and the second electrode terminal are coupled to the coupling portion of the first HV connector 300a and the coupling portion of the second HV connector 300b through the through hole 210, and after the coupling is completed, the through hole 210 A screw 221 is coupled to the covering sealing member 220 so that the through hole 210 may be sealed.
- FIG. 4 is a partially enlarged view of the HV connector of FIG. 2;
- the first HV connector shown in (a) is a male connector
- the second HV connector shown in (b) is a female connector so that they are connected to each other. Therefore, electrical connection can be made by combining the first HV connector of one battery module with the second HV connector of an adjacent battery module in a state where a plurality of battery modules are arranged side by side.
- FIG. 5 is an exploded perspective view of a portion of the battery module of FIG. 2
- FIG. 6 is a perspective view of a portion of the battery module of FIG. 2 .
- a PCB 240 is attached to one end of the battery cell stack accommodated inside the module housing 200 to measure and manage the voltage and temperature of the battery cells.
- Sealing plates 250 are combined with the module housing 200 at both ends of the module housing 200 in the lengthwise direction to prevent leakage of insulating oil, and end plates 260 are coupled to the outside of the sealing plate 250. do.
- the sealing plate 250 includes a PCB coupling portion 251 connected to the PCB 240, and the CMC 252 connected to the PCB coupling portion 251 is interposed between the sealing plate 250 and the end plate 260. Located.
- the CMC is connected to the PCB connected to the battery cell to measure the voltage and temperature of the battery cell, and is connected to the BMS while forming a connection with the CMC of another battery module.
- a CMC cover 253 is coupled to the outside of the CMC 252 to cover the CMC 252, and the CMC cover 253 protrudes to the outside of the end plate 260 through the through hole of the end plate 260.
- the LV assembly may be configured such that the CMC is omitted according to the design of the battery module, and even in this case, it may be connected to the BMS through the LV line connected to the LV connector.
- the LV assembly 400 is a component for connecting the battery cells constituting the battery cell stack to the BMS, and includes a bus bar 130, an FPC 241, a PCB 240, a CMC 252, and an LV connected to the battery cells.
- the connectors 410 are sequentially connected to each other.
- the LV connector 410 includes a terminal unit 411 and a terminal unit cover 412 to which the terminal unit 411 is mounted, and the LV connector 410 is provided with the terminal unit 411 mounted on the terminal unit cover 412, and the LV connector 410 is CMC ( 252).
- the configuration of the LV assembly 400 may be configured differently from that shown in FIGS. 5 and 6 according to the configuration of the battery module, and the battery cell stack and the BMS are connected to sense the voltage and temperature of the battery cell.
- the FPC, PCB, and CMC may be configured to be omitted.
- the CMC cover 253 is coupled to the CMC to cover the CMC 252 and the LV connector 410, and seals the coupling portion of the LV connector 410 to the module housing. In detail, leakage of insulating oil can be prevented by coupling the CMC cover 253 to the CMC with the O-ring added thereto.
- FIG. 7 is an enlarged view of a portion to which a cooling port 500 is coupled in the battery module of FIG. 2 .
- the cooling port 500 may be first coupled to the cooling port mounting portion formed on the end plate 260 and then rotated 90 degrees to complete the coupling.
- injection and discharge of insulating oil can be performed, and in the case of a plurality of battery modules combined, a plurality of battery modules along the cooling line 510 Injection and discharge of insulating oil to the field can be made.
- the cooling port may be formed in a form in which a part of the cooling port is coupled to the cooling port mounting portion of the end plate and a cooling line is coupled to the cooling port.
- a quick connector may be used as the cooling pod.
- FIG. 8 is a perspective view of a plurality of battery modules according to the present invention.
- FIG. 8 four battery modules 700 are shown arranged side by side, and four battery modules 700 are shown in a spaced apart form, but the battery module 700 is HV connector 300 It can be coupled by and closely arranged.
- a cooling line 510 is coupled to the cooling port 500, and insulating oil is introduced from the same side of the four battery modules 700, passing through the inside of the battery module in the direction of the dotted line arrow and flowing to the outlet on the opposite side of the inlet, , the insulating oil is discharged through the discharge part.
- the flow of the insulating oil may vary depending on the method of forming the cooling line, and the inlet and outlet passages of the insulating oil may be configured in at least one of a series connection and a parallel connection structure between the plurality of battery modules. there is.
- the plurality of battery modules are connected to LV connectors 400 coupled to all battery cell stacks, and one end of the LV connectors 400 is connected to the BMS.
- FIG. 9 is a front view of a module housing according to one embodiment
- FIG. 10 is a front view of a module housing according to another embodiment.
- the upper surface 231 and the lower surface 232 of the module housing have an empty space 235 therein. Due to the structure with such an empty space, the weight can be reduced. In addition, rigidity of the module housing can be secured by forming the barrier rib 236 therein. Accordingly, it is possible to construct a battery pack that does not include members such as a separate battery pack cover and a battery pack lower cover.
- Such a module housing may be formed by an extrusion molding method, and aluminum, carbon steel, stainless, and alloys thereof may be used as a material.
- the battery cell stack may repeatedly undergo volume expansion and contraction during charging and discharging. At least one of the first side surface 233 and the second side surface 234 is provided to absorb the volume expansion of the battery cell stack. includes a buffer structure 237.
- the module housing includes screw fastening parts on the first side 233 and the second side surface 234, and a plurality of battery modules can be stably fixed by being connected to each other by screws 201 coupled to the screw fastening parts.
- FIG. 11 is a perspective view of a battery pack according to the present invention.
- a battery pack 1000 includes a plurality of battery modules 700 disposed adjacent to side surfaces of a module housing, a BDU 900 disposed on one side of the plurality of battery modules 700, and a plurality of battery modules 900 disposed adjacent to each other.
- a battery pack frame 800 surrounding the battery modules 700 and the BDU 900 is included.
- the plurality of battery modules 700 are electrically connected to adjacent battery modules 700 through HV connectors, and the BDU 900 is connected to HV connectors of adjacent battery modules 700 .
- the plurality of battery modules 700 have a structure in which upper and lower surfaces of the module housing 200 are exposed while being mounted on the battery pack frame 800 .
- the battery pack frame 800 has openings 810 for connection at locations corresponding to HV connectors and LV connectors mounted on the plurality of battery modules 700 .
- the battery pack frame 800 may be composed of a first member 821, a second member 822, a third member 823, and a fourth member 824 connected to be perpendicular to each other, and the first member 821, the second member 822, the third member 823, and the fourth member 824 may be formed as separate members capable of being separated and combined with each other.
- first member 821 , the second member 822 , the third member 823 , and the fourth member 824 may include mounting parts for mounting on devices.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (14)
- 복수의 전지셀들로 구성되는 전지셀 스택;전장 방향을 따라 배치되는 하나 이상의 상기 전지셀 스택을 수용하는 모듈 하우징;전지모듈들을 전기적으로 연결하기 위한 HV커넥터(High Voltage Connector);상기 복수의 전지셀의 전압과 온도를 센싱하기 위한 LV어셈블리(Low Voltage Assembly);상기 복수의 전지셀들을 냉각하기 위한 절연유; 및상기 절연유의 입출입을 위한 냉각 포트;를 포함하고,상기 절연유는 상기 모듈 하우징 내부에서 유동하면서 상기 복수의 전지셀들을 직접 냉각하는 전지모듈.
- 제1항에 있어서,상기 모듈 하우징은 상면, 하면, 제1측면 및 제2측면을 포함하며,상기 HV커넥터는 상기 제1측면에 위치하는 제1HV커넥터 및 제2측면에 위치하는 제2HV커넥터를 포함하는 전지모듈.
- 제2항에 있어서, 상기 전지셀 스택은 제1전지셀 스택 및 제2전지셀 스택을 포함하고,상기 제1전지셀 스택의 제1전극단자와 상기 제2전지셀 스택의 제2전극단자는 상기 제1HV커넥터에 연결되고,상기 제1전지셀 스택의 제2전극단자와 상기 제2전지셀 스택의 제1전극단자는 상기 제2HV커넥터에 연결되는 전지모듈.
- 제2항에 있어서,상기 모듈 하우징의 하면 중 상기 제1HV커넥터 및 상기 제2HV커넥터와 상기 제1전지셀 스택 및 제2전지셀 스택이 연결되는 연결부의 하부에는 관통구가 형성되고,상기 관통구는 밀봉부재가 부착되어 밀봉되어 있는 전지모듈.
- 제1항에 있어서, 상기 HV커넥터, 상기 LV어셈블리 및 상기 냉각 포트가 상기 모듈 하우징에 연결되는 연결부는 상기 절연유의 누액을 방지하기 위한 밀봉부재를 포함하는 전지모듈.
- 제1항에 있어서, 상기 LV어셈블리는 LV커넥터를 포함하는 전지모듈.
- 제6항에 있어서, 상기 LV어셈블리는, FPC(Flexible Printed Circuit), PCB(Printed Circuit Board) 및 CMC(Cell Management Controller)로 이루어진 군에서 선택되는 어느 하나 이상을 더 포함하는 전지모듈.
- 제1항 내지 제7항 중 어느 한 항에 따른 전지모듈을 포함하는 전지팩에 있어서,모듈 하우징의 측면이 인접하게 배치된 복수의 전지모듈들;상기 복수의 전지모듈들의 일측에 배치되는 BDU(Battery Disconnect Unit); 및상기 복수의 전지모듈들과 상기 BDU를 둘러싸는 전지팩 프레임;을 포함하고,상기 복수의 전지모듈들은 HV커넥터를 통해 인접하는 전지모듈과 전기적으로 연결되며, 상기 BDU는 상기 인접하는 전지모듈의 HV커넥터와 연결되는 전지팩.
- 제8항에 있어서,상기 모듈 하우징은 제1측면과 제2측면에 나사 체결부를 포함하고,복수의 전지모듈들은 상기 나사 체결부에 결합된 나사에 의해 서로 연결되는 전지팩.
- 제8항에 있어서, 상기 복수의 전지모듈들은 모든 전지셀 스택들에 결합된 LV어셈블리를 포함하고,상기 LV어셈블리는 BMS(Battery Management System)와 연결되는 전지팩.
- 제8항에 있어서, 절연유의 유입 및 배출 유로가 상기 복수의 전지모듈들 사이에서 직렬 연결 및 병렬 연결 중 적어도 어느 하나의 연결 구조로 구성되는 전지팩.
- 제8항에 있어서, 상기 복수의 전지모듈들은 상기 전지팩 프레임에 장착된 상태에서 모듈 하우징의 상면 및 하면이 노출되는 구조로 이루어진 전지팩.
- 제10항에 있어서, 상기 전지팩 프레임은 복수의 전지모듈들에 장착된 HV커넥터 및 LV어셈블리와 대응되는 위치에 접속용 개구가 형성되어 있는 전지팩.
- 제8항에 있어서, 상기 전지팩 프레임은 서로 수직이 되도록 연결되는 제1부재, 제2부재, 제3부재, 및 제4부재로 구성되는 전지팩.
Priority Applications (4)
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US18/283,338 US20240186617A1 (en) | 2022-02-16 | 2023-02-14 | Battery Module Including Insulating Oil and Battery Pack Including the Same |
JP2023554047A JP2024510432A (ja) | 2022-02-16 | 2023-02-14 | 絶縁油を含む電池モジュール及びこれを含む電池パック |
CN202380010538.8A CN116964833A (zh) | 2022-02-16 | 2023-02-14 | 包括绝缘油的电池模块和包括该电池模块的电池组 |
EP23756598.1A EP4379911A1 (en) | 2022-02-16 | 2023-02-14 | Battery module containing insulating oil, and battery pack comprising same |
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KR1020220020203A KR20230123266A (ko) | 2022-02-16 | 2022-02-16 | 절연유를 포함하는 전지모듈 및 이를 포함하는 전지팩 |
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KR20210048855A (ko) * | 2019-10-24 | 2021-05-04 | 주식회사 엘지화학 | 전지 모듈 및 이를 포함하는 전지팩 |
KR20210133529A (ko) * | 2020-04-29 | 2021-11-08 | 주식회사 엘지에너지솔루션 | 전지팩 및 이를 포함하는 디바이스 |
KR20220020203A (ko) | 2020-08-11 | 2022-02-18 | 김성우 | 이중으로 에어패널이 형성되는 비말차단장치 |
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- 2023-02-14 CN CN202380010538.8A patent/CN116964833A/zh active Pending
- 2023-02-14 EP EP23756598.1A patent/EP4379911A1/en active Pending
- 2023-02-14 US US18/283,338 patent/US20240186617A1/en active Pending
- 2023-02-14 WO PCT/KR2023/002130 patent/WO2023158186A1/ko active Application Filing
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CN104466049A (zh) * | 2013-09-13 | 2015-03-25 | 三星Sdi株式会社 | 电池组 |
KR101834846B1 (ko) | 2016-08-08 | 2018-03-06 | 보성파워텍 주식회사 | 배터리 모듈 |
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KR20210133529A (ko) * | 2020-04-29 | 2021-11-08 | 주식회사 엘지에너지솔루션 | 전지팩 및 이를 포함하는 디바이스 |
KR20220020203A (ko) | 2020-08-11 | 2022-02-18 | 김성우 | 이중으로 에어패널이 형성되는 비말차단장치 |
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KR20230123266A (ko) | 2023-08-23 |
US20240186617A1 (en) | 2024-06-06 |
EP4379911A1 (en) | 2024-06-05 |
JP2024510432A (ja) | 2024-03-07 |
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