WO2024010428A1 - 배터리 모듈 - Google Patents
배터리 모듈 Download PDFInfo
- Publication number
- WO2024010428A1 WO2024010428A1 PCT/KR2023/009709 KR2023009709W WO2024010428A1 WO 2024010428 A1 WO2024010428 A1 WO 2024010428A1 KR 2023009709 W KR2023009709 W KR 2023009709W WO 2024010428 A1 WO2024010428 A1 WO 2024010428A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery module
- joint
- electrode lead
- present
- bus bar
- Prior art date
Links
- 238000005452 bending Methods 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
-
- 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
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
-
- 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
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 battery modules.
- lithium secondary batteries have little memory effect compared to nickel-based secondary batteries, so they can be freely charged and discharged. It is receiving attention for its extremely low self-discharge rate and high energy density.
- lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is built into a metal can and pouch-type secondary batteries in which the electrode assembly is built in a pouch of an aluminum laminate sheet, depending on the shape of the exterior material.
- the electrical connection between secondary batteries is often made by bringing electrode leads into direct contact with each other. At this time, to connect the secondary batteries in parallel, electrode leads of the same polarity are connected to each other, and to connect the secondary batteries in series, electrode leads of different polarities are connected to each other.
- the bus bar may be connected to electrode leads, particularly two or more electrode leads. At this time, the joint connection between the electrode lead and the bus bar is often made by welding.
- the electrode leads of the battery cell can be welded after being brought into close contact with the busbar in a bent state.
- welding defects may occur depending on the bending quality of the electrode lead.
- stress may occur in the electrode lead itself or the tab-lead joint area.
- each electrode lead in order to weld each electrode lead to one bus bar in a state in which a plurality of battery cells are stacked, the length of each electrode lead may vary. At this time, deviations may occur in the length of each electrode lead. In addition, welding defects may occur due to a gap between electrode leads stacked according to this length deviation.
- the risk of tab disconnection of the battery cell may increase depending on the positions of the bus bar and electrode leads.
- the bending angle of the battery cell tab may become very large depending on the amount of swelling. And, this increase in bending angle may cause an internal disconnection issue of the battery cell tab.
- the present invention aims to solve the above-mentioned problems and other problems.
- Another object of the present invention may be to provide a battery module including a structure that improves the weldability of electrode leads and bus bars.
- Another object of the present invention may be to provide a battery module including a structure that can reduce scrap costs when manufacturing unit battery cells.
- Another object of the present invention may be to provide a battery module including a structure that can effectively prevent disconnection of battery cell tabs or electrode leads.
- Another object of the present invention may be to provide a battery module including a structure in which the bending process of electrode leads can be eliminated.
- Another object of the present invention may be to provide a battery module including a structure that can increase the degree of freedom in the welding method according to the joint structure.
- Another object of the present invention may be to provide a battery module including a structure that can prevent welding defects due to bending quality.
- Another object of the present invention may be to provide a battery module including a structure in which welding quality can be stably secured through welding of the same material as the bus bar and the electrode lead.
- a battery module for achieving the above object includes a plurality of battery cells each having electrode leads protruding forward and stacked in the left and right directions;
- the main body part and at least a portion of the main body part may be configured in a bent form and include a bus bar having a junction part electrically connected to the electrode lead.
- the electrode lead and the joint may be configured to be joined by welding.
- junction portion may be formed in plurality to correspond one-to-one with the electrode lead.
- the electrode lead and the joint may be configured to make surface contact.
- the joint may be formed by cutting at least a portion of the main body and bending the cut portion.
- the bus bar may include a hole adjacent to the joint and penetrating the main body, and the diameter of the joint may be smaller than the diameter of the hole.
- the bus bar includes a hole adjacent to the joint and penetrating the main body, and the electrode lead can pass through the hole.
- bus bar may be composed of different metal layers.
- At least a portion of the joint may be composed of different metal layers.
- a battery pack according to the present invention for achieving the above object includes a battery module according to the present invention.
- a vehicle according to the present invention for achieving the above object includes a battery module according to the present invention.
- An energy storage system according to the present invention for achieving the above object includes a battery module according to the present invention.
- weldability can be improved in a configuration in which an electrode lead and a bus bar are welded.
- scrap costs can be reduced when manufacturing a unit cell.
- disconnection of a cell tab or lead can be effectively prevented.
- the bending process of the cell lead can be eliminated. Accordingly, stress and welding defects in cell tabs or cell leads can be effectively prevented. Additionally, according to this aspect of the present invention, the manufacturing cost of battery modules or packs can be reduced and the manufacturing process can be simplified.
- the degree of freedom of the welding method according to the joint structure can be increased.
- assembly/welding defects due to lead cutting length deviation can be prevented.
- welding defects due to bending quality can be prevented.
- welding quality can be stably secured through welding of the same material as the bus bar and the electrode lead.
- disconnection due to swelling can be prevented and assembly efficiency can be improved by maintaining the cell tab and cell lead horizontally.
- the present invention may have various other effects, and these will be described in each implementation configuration, or the description of effects that can be easily inferred by those skilled in the art will be omitted.
- FIG. 1 is a perspective view showing a battery module according to an embodiment of the present invention.
- Figure 2 is a diagram showing some components of a battery module separated according to an embodiment of the present invention.
- FIG. 4 is a view showing a partial configuration of the battery module of FIG. 3 from one side.
- Figure 5 is a diagram showing a partial configuration of a battery module according to an embodiment of the present invention.
- FIG. 6 is a view showing a partial configuration of the battery module of FIG. 5 from one side.
- Figure 7 is a perspective view showing a bus bar of a battery module according to an embodiment of the present invention.
- Figure 8 is a perspective view showing a bus bar of a battery module according to another embodiment of the present invention.
- Figure 9 is a perspective view showing a bus bar of a battery module according to another embodiment of the present invention.
- Figure 10 is a perspective view showing a battery module according to another embodiment of the present invention.
- Figure 11 is a perspective view showing a battery module according to another embodiment of the present invention.
- FIG. 1 is a perspective view showing a battery module according to an embodiment of the present invention.
- Figure 2 is a diagram showing some components of a battery module separated according to an embodiment of the present invention.
- Figure 3 is a diagram showing a partial configuration of a battery module according to an embodiment of the present invention.
- FIG. 4 is a view showing a partial configuration of the battery module of FIG. 3 from one side.
- Figure 4 shows only the bus bar 200 as a cross-section, and the body 110 of the battery cell 100 is schematically shown.
- the battery module may be configured to include a plurality of battery cells 100 and a bus bar 200.
- the battery module may include a frame 300 providing an internal space 301 .
- the frame 300 may have a shape with open front and rear sides.
- the end cover 400 may be provided on the front and rear sides of the frame 300.
- the end cover 400 may be coupled to the open portion of the frame 300. At this time, the frame 300 and the end cover 400 may be joined by welding.
- a battery module may be referred to as a cell assembly or battery pack.
- the battery module according to an embodiment of the present invention additionally includes components such as a BMS, busbar assembly, case, relay, current sensor, etc., it may be referred to as a battery pack.
- the battery cells 100 may be provided in plural numbers. Each battery cell 100 may include a body 110 and an electrode lead 120 extending or protruding from the body 110 . Each of the plurality of battery cells 100 may have at least one electrode lead 120 protruding from the body 110 toward the front side or the +Z axis. Additionally, each of the plurality of battery cells 100 may have at least one electrode lead 120 protruding from the body 110 toward the rear side or the -Z axis. A plurality of battery cells 100 may be stacked in the left-right direction or the X-axis direction. The battery cell 100 may be accommodated inside the frame 300.
- the plurality of battery cells 100 may be pouch-type secondary batteries.
- a pouch-type secondary battery may be configured with an electrode assembly and an electrolyte stored inside a pouch exterior material.
- the pouch exterior material may be configured to seal the edges of two pouches in which the electrode assembly and electrolyte are stored.
- a pouch-type secondary battery may be configured with a storage portion located in the center and a sealing portion surrounding the periphery.
- the pouch-type secondary battery may be configured in a square shape with four corners, and three or four of the four corners may be sealed.
- the bus bar 200 may be electrically connected to the electrode lead 120.
- the electrode leads 120 of the plurality of battery cells 100 may each be physically and/or electrically connected to the bus bar 200. Depending on the connection type of the bus bar 200 and the electrode lead 120, the plurality of battery cells 100 may be electrically connected in series or parallel.
- the bus bar 200 may extend in the left and right directions. Additionally, the longitudinal direction of the bus bar 200 may be perpendicular to the direction in which the electrode lead 120 protrudes. And the bus bar 200 may be located between the end cover 400 and the plurality of battery cells 100. Additionally, the bus bar 200 can be accommodated in the space formed by the frame 300 and the end cover 400.
- the bus bar 200 may be configured to include a main body portion 210 and a joint portion 220.
- the main body 210 may be configured in a bar and/or plate shape. As the number of battery cells 100 connected to the bus bar 200 increases, the main body 210 may be configured to extend long.
- the main body 210 may be made of a metal material.
- the joint portion 220 may be configured in a manner in which at least a portion of the main body portion 210 is bent. Alternatively, the joint portion 220 may be configured to extend or protrude from the main body portion 210.
- the joint 220 may be physically and/or electrically connected to the electrode lead 120. For example, referring to FIG. 3, the joint 220 may be bent toward the front side or the +Z axis direction. The joint 220 may be positioned to face the electrode lead 120.
- the joint portion 220 is formed by bending, so that the electrode lead 120 can be physically and/or electrically connected to the joint portion without bending or folding. Because of this, pulling or stress applied to the electrode lead 120 can be minimized. Additionally, damage or disconnection of the electrode lead 120 can be prevented.
- the tabs of the electrode lead 120 and the battery cell 100 can be horizontally connected, attached, fixed, or combined. That is, inside the battery cell 100, the electrode tab and the electrode lead 120 are coupled through surface contact, and this coupling portion is not bent and can be maintained flat. Accordingly, the possibility of disconnection or damage to the battery cell 100 may be reduced.
- the joint portion 220 is formed by bending the main body portion 210, manufacturing of the bus bar becomes easy and manufacturing time and cost can be reduced. Accordingly, productivity of bus bars and battery modules including them can be improved.
- the electrode lead 120 and the joint portion 220 of the battery module may be configured to be joined by welding.
- the electrode lead 120 and the joint 220 may be welded together using a lead joint (J) method.
- welding is performed in a state where the electrode lead 120 faces the joint portion 220 without being bent, thereby improving weldability.
- the junction portion 220 of the battery module according to an embodiment of the present invention may be formed in plurality to correspond one-to-one with the electrode lead 120.
- each electrode lead 120 may be coupled to one joint 200 .
- each electrode lead 120 may be configured to have the same length in the front-to-back direction or the length in the Z-axis direction. That is, in all battery cells 100 included in the battery module according to the present invention, the electrode leads 120 protruding outward from the body 110 may all have the same length.
- the arrangement spacing of the plurality of battery cells 100 and the arrangement spacing of the plurality of junction parts 200 may be configured to be the same.
- weldability can be improved by combining one joint 220 and one electrode lead 120 through one joint J.
- the productivity of the battery module can be improved by configuring the electrode leads 120 of each battery cell 100 to have the same shape or the same length.
- the electrode lead 120 of the battery module may be configured to have a flat shape.
- the electrode lead 120 may be configured to have an overall flat shape. That is, the electrode lead 120 may have an overall flat shape without bending or folding. Additionally, each of the plurality of electrode leads 120 may have a flat shape and/or a planar shape.
- the electrode lead 120 extends outward from the body 110 of the battery cell 100, but is not bent and is straight in parallel to the Z-axis direction. It may be extended.
- a plurality of electrode leads 120 formed one welded joint and were connected to the bus bar 200.
- at least a portion of the plurality of electrode leads 120 may be bent, and the electrode leads 120 may be damaged due to bending.
- the electrode lead 120 has an overall flat shape without bending or folding, so damage or disconnection of the electrode lead 120 can be prevented.
- the process of bending the electrode lead 120 is omitted, thereby improving the productivity of the battery module.
- bus bar 200 may be referred to as a bending-free busbar (200) in the sense that the electrode lead 120 may be configured not to bend for welding.
- the electrode lead 120 and the junction part 220 of the battery module may be configured to make surface contact.
- the joint portion 220 may be formed in a flat shape by bending at least a portion of the main body portion 210 having a bar or plate shape.
- the joint 220 and the electrode lead 120 may be physically and/or electrically connected and may be in surface contact.
- the joint 220 may extend toward the front side or in the +Z-axis direction depending on the bending direction. Alternatively, the joint 220 may extend toward the rear or the -Z axis direction depending on the bending direction. Alternatively, at least a portion of the joint 220 may extend in the front side or +Z-axis direction and the remainder may extend in the rear side or -Z-axis direction. When the joint portion 220 extends toward the rear side or the -Z-axis direction, the length of the electrode lead 120 may be shorter than when the joint portion 220 extends toward the front side or the +Z-axis direction.
- the joint portion 220 may be configured to be bent approximately perpendicular to the main body portion 210.
- the joint portion 220 when the main body portion 210 is configured parallel to the X-Y plane, the joint portion 220 is aligned in the It may be configured in a parallel form.
- the joint portion 220 may be configured to be parallel to the longitudinal direction of the battery cell 100.
- the battery cell 100 can be said to be formed to be long in the Z-axis direction
- the joint portion 220 of the bus bar 200 can also be said to be formed to be long in the Z-axis direction. there is.
- the electrode lead 120 can be selectively extended to the front side or the rear side, thereby increasing the degree of freedom in designing the battery module.
- the electrode lead 120 continues to have a straight shape not only in the portion that protrudes outward from the sealing portion of the body 110 but also in the portion welded to the joint portion 220 of the bus bar 200. It can be maintained.
- the junction part 220 does not require separate component processing, so the productivity of the battery module can be improved. Additionally, in this case, since there is no need for structures or fastening members to couple the joint 220 to the main body 210, the coupling force between the joint 220 and the main body 210 can be stably secured. Additionally, contact resistance between the joint portion 220 and the main body portion 210 can be eliminated or reduced.
- the joint portion 220 of the bus bar 200 of the battery module has at least a portion of the main body portion 210 cut and the cut portion is bent. It can be configured to form.
- the incision line C may penetrate the main body 210.
- the incision line (C) can form three of the four sides of a square.
- the width W of the cut portion may be equal to or larger than the width of the electrode lead 120.
- the cut portion of the main body 210 may be bent toward the front side or the +Z axis direction. Referring to FIG. 7, the cut portion of the main body 210 may be bent toward the rear or -Z axis. The cut portion of the main body 210 may be bent to form the joint 220. The joint portion 220 may be bent or extended in a direction perpendicular to the main body portion 210.
- the joint portion 220 does not require separate component processing and can be formed through a relatively simple process. Because of this, the productivity of the battery module can be improved.
- the bus bar 200 of the battery module includes a hole 211 adjacent to the junction part 220 and penetrating the main body 210, and the junction part 220.
- the diameters D2 and D4 of 220 may be smaller than the diameters D1 and D3 of the hole 211.
- the hole 211 may be formed by bending the joint 220.
- the hole 211 may be formed in a square shape.
- the diameters D1 and D3 of the hole 211 may mean the maximum diameters D1 and D3 of the hole 211.
- the diameters (D2, D4) of the joint 220 may mean the maximum diameters (D2, D4) of the joint.
- the joint 220 may refer to a flat plate portion.
- the diameters D2 and D4 of the joint 220 may be smaller than the diameters D1 and D3 of the hole 211.
- the diameters D2 and D4 of the joint portion 220 may be formed as small as the width of the cut line C in the diameters D1 and D3 of the hole 211.
- the joint 220 may be entirely accommodated in the hole 211.
- the joint portion 220 and the hole 211 can be formed simultaneously. Because of this, the manufacturing process of the bus bar 200 can be simplified and the productivity of the battery module can be improved.
- the bus bar 200 of the battery module includes a hole 211 adjacent to the junction part 220 and penetrating the body part 210, and an electrode Lead 120 may be configured to pass through hole 211.
- At least a portion of the electrode lead 120 may pass through the hole 211 and be coupled to the joint 220.
- the electrode lead 120 and the joint 220 may be referred to as a lead insert joint (J) structure.
- the joint portion 220 and the hole 211 can be formed simultaneously. Because of this, the manufacturing process of the bus bar 200 can be simplified and the productivity of the battery module can be improved.
- FIGS. 10 and 11 show only the bus bar 200 as a cross-section, and the body 110 of the battery cell 100 is schematically shown.
- the bus bar 200 of the battery module according to an embodiment of the present invention may be composed of different metal layers (M1 and M2).
- the bus bar 200 may be made of a clad metal material.
- the bus bar 200 may be composed of two metal layers (M1 and M2).
- the two metal layers (M1, M2) may be made of different materials.
- the bus bar 200 may be configured to include a metal layer made of the same material as the metal material of the cathode electrode lead 120 and a metal layer made of the same material as the metal material of the anode electrode lead 120.
- one side of the bus bar 200 may be made of aluminum, and the other side of the bus bar may be made of copper.
- the electrode lead 120 can be welded to the metal layers M1 and M2 of the bus bar 200 having the same metal material as that of the electrode lead 120. Because of this, the weldability of the bus bar 200 and the electrode lead 120 can be improved. Additionally, due to this, the degree of freedom in arranging the plurality of battery cells 100 may be increased.
- the junction 220 of the battery module may be composed of different metal layers M1 and M2.
- the body portion 210 and the joint portion 220 of the bus bar 200 may be formed as one body, and the body portion 210 and the joint portion 220 may be made of the same clad metal material.
- the joint portion 220 may be bent toward the rear side or the -Z axis direction.
- the right side of the joint 220 may be composed of a first metal layer (M1)
- the left side of the joint 220 may be composed of a second metal layer (M2).
- the electrode lead 120 may be selectively welded to the first metal layer (M1) or the second metal layer (M2) of the joint 220.
- the first metal layer (M1) is made of aluminum and the electrode lead 120 is made of aluminum
- the electrode lead 120 may be welded to the first metal layer (M1).
- the second metal layer (M2) is made of copper and the electrode lead 120 is made of copper
- the electrode lead 120 may be welded to the second metal layer (M2).
- the electrode lead 120 can be selectively welded to the joint 220 having the same metal material as that of the electrode lead 120. Because of this, the weldability of the bus bar 200 and the electrode lead 120 can be improved.
- bending of the electrode lead 120 can be minimized even if the electrode lead 120 is welded to either the left side or the right side of the joint 220.
- a portion of the joint 220 may be bent toward the rear side or the -Z axis direction, and the remainder of the joint portion 220 may be bent toward the front side or the +Z axis direction.
- the electrode lead 120 may be selectively welded to the joint 220 bent in the front side or +Z-axis direction or to the joint 220 bent in the rear side or -Z-axis direction. That is, the joint portion 220 may be bent in the +Z-axis direction or the -Z-axis direction depending on the material of the electrode lead 120 to be welded.
- joints 220 bent in opposite directions with respect to the main body 210 will be provided on one bus bar 200. You can.
- the electrode lead 120 may be welded to the front side or the right side of the joint 220 bent in the +Z-axis direction or to the second metal layer M2. At this time, the metal material of the electrode lead 120 and the metal material of the second metal layer M2 may be the same material.
- the electrode lead 120 may be welded to the rear side or the right side of the joint 220 bent in the -Z-axis direction or to the first metal layer M1.
- the metal material of the electrode lead 120 and the metal material of the first metal layer (M1) may be the same material.
- the length of the electrode lead 120 of the battery cell 100 welded to the junction 220 bent in the front side or +Z axis direction is the length of the junction 220 bent in the rear side or -Z axis direction. It may be configured to be longer than the length of the electrode lead 120 of the welded battery cell 100.
- the electrode lead 120 can be selectively welded to the joint 220 having the same metal material as that of the electrode lead 120. Because of this, the weldability of the bus bar 200 and the electrode lead 120 can be improved.
- the degree of freedom in the stacking order of the battery cells 100 can be increased.
- the bending direction of the junction 220 can be selectively configured to correspond to the stacking order of the battery cells 100.
- the electrode lead 120 Bending of the lead 120 can be minimized.
- the battery pack according to the present invention may include the battery module according to the present invention described above.
- the battery pack according to the present invention in addition to the battery module according to the present invention described above, includes various other components, such as BMS, bus bar, pack case, relay, current sensor, etc. known at the time of filing of the present invention. It may further include battery pack components, etc.
- the automobile according to the present invention may include the battery module according to the present invention described above.
- the battery module according to the present invention can be applied to automobiles such as electric vehicles or hybrid vehicles.
- the vehicle according to the present invention may further include various other components included in the vehicle, such as a vehicle body, a motor, and a control device such as an ECU (electronic control unit), in addition to the battery module.
- ECU electronic control unit
- the energy storage system (ESS) according to the present invention may include the battery module according to the present invention described above.
- the energy storage system according to the present invention includes other components included in the energy storage system in addition to the battery module, for example, a sensor for detecting the state of the battery module, a firefighting module for controlling thermal events, and a DC part. , it may further include an AC part and a BSC part.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (15)
- 각각 전방으로 돌출되는 전극 리드를 구비하고 좌우 방향으로 적층되는 복수의 배터리 셀; 그리고,본체부 및 상기 본체부의 적어도 일부가 벤딩된 형태로 구성되어 상기 전극 리드와 전기적으로 연결되는 접합부를 구비하는 버스바를 포함하는 배터리 모듈.
- 제1 항에 있어서,상기 전극 리드와 상기 접합부는,용접으로 결합되도록 구성되는 배터리 모듈.
- 제1 항에 있어서,상기 접합부는,상기 전극 리드와 일대일 대응되도록 복수로 형성되는 배터리 모듈.
- 제1 항에 있어서,상기 전극 리드는,평평한 형상을 갖도록 구성되는 배터리 모듈.
- 제4 항에 있어서,상기 전극 리드와 상기 접합부는,면 접촉되도록 구성되는 배터리 모듈.
- 제1 항에 있어서,상기 접합부는,상기 본체부와 일체로 형성되도록 구성되는 배터리 모듈.
- 제1 항에 있어서,상기 접합부는,전후 방향으로 연장되는 배터리 모듈.
- 제1 항에 있어서,상기 접합부는,상기 본체부의 적어도 일부분이 절개되고, 절개된 부분이 벤딩되어 형성된 배터리 모듈.
- 제1 항에 있어서,상기 버스바는,상기 접합부에 인접하고 상기 본체부를 관통하는 홀을 포함하고,상기 접합부의 직경은,상기 홀의 직경보다 작도록 구성되는 배터리 모듈.
- 제1 항에 있어서,상기 버스바는,상기 접합부에 인접하고 상기 본체부를 관통하는 홀을 포함하고,상기 전극 리드는,상기 홀을 통과하는 배터리 모듈.
- 제1 항에 있어서,상기 버스바의 적어도 일부는,서로 다른 금속층으로 구성되는 배터리 모듈.
- 제11 항에 있어서,상기 접합부의 적어도 일부는,서로 다른 금속층으로 구성되는 배터리 모듈.
- 제1 항 내지 제12 항 중 어느 한 항의 배터리 모듈을 포함하는 배터리 팩.
- 제1 항 내지 제10 항 중 어느 한 항의 배터리 모듈을 포함하는 자동차.
- 제1 항 내지 제10 항 중 어느 한 항의 배터리 모듈을 포함하는 에너지 저장 시스템.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP23835894.9A EP4391202A1 (en) | 2022-07-08 | 2023-07-07 | Battery module |
CN202380013515.2A CN117957711A (zh) | 2022-07-08 | 2023-07-07 | 电池模块 |
Applications Claiming Priority (4)
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KR10-2022-0084676 | 2022-07-08 | ||
KR20220084676 | 2022-07-08 | ||
KR1020230031777A KR20240007581A (ko) | 2022-07-08 | 2023-03-10 | 배터리 모듈 |
KR10-2023-0031777 | 2023-03-10 |
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WO2024010428A1 true WO2024010428A1 (ko) | 2024-01-11 |
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PCT/KR2023/009709 WO2024010428A1 (ko) | 2022-07-08 | 2023-07-07 | 배터리 모듈 |
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EP (1) | EP4391202A1 (ko) |
WO (1) | WO2024010428A1 (ko) |
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KR20210110555A (ko) * | 2016-12-23 | 2021-09-08 | 에스케이이노베이션 주식회사 | 배터리 모듈 |
JP2022014957A (ja) * | 2020-07-08 | 2022-01-21 | 株式会社オートネットワーク技術研究所 | 電池配線モジュール |
KR20220043373A (ko) * | 2020-09-29 | 2022-04-05 | 에이치그린파워 주식회사 | 배터리 모듈의 리드 연결 구조 및 방법 |
KR20220084676A (ko) | 2020-12-14 | 2022-06-21 | (주)아이벡스메디칼시스템즈 | 외이와 중이간 압력 평형 상태를 감지하는 고압산소챔버의 자동 압력 제어 방법 |
KR20230031777A (ko) | 2021-08-27 | 2023-03-07 | 가부시기가이샤 디스코 | 기판의 분할 방법 |
-
2023
- 2023-07-07 EP EP23835894.9A patent/EP4391202A1/en active Pending
- 2023-07-07 WO PCT/KR2023/009709 patent/WO2024010428A1/ko active Application Filing
Patent Citations (7)
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JPH07106634A (ja) * | 1993-09-17 | 1995-04-21 | Hewlett Packard Co <Hp> | 発光ダイオードモジュールおよび発光ダイオード光源 |
KR20150052755A (ko) * | 2013-11-05 | 2015-05-14 | 타이코에이엠피(유) | 배터리 셀 연결보드 |
KR20210110555A (ko) * | 2016-12-23 | 2021-09-08 | 에스케이이노베이션 주식회사 | 배터리 모듈 |
JP2022014957A (ja) * | 2020-07-08 | 2022-01-21 | 株式会社オートネットワーク技術研究所 | 電池配線モジュール |
KR20220043373A (ko) * | 2020-09-29 | 2022-04-05 | 에이치그린파워 주식회사 | 배터리 모듈의 리드 연결 구조 및 방법 |
KR20220084676A (ko) | 2020-12-14 | 2022-06-21 | (주)아이벡스메디칼시스템즈 | 외이와 중이간 압력 평형 상태를 감지하는 고압산소챔버의 자동 압력 제어 방법 |
KR20230031777A (ko) | 2021-08-27 | 2023-03-07 | 가부시기가이샤 디스코 | 기판의 분할 방법 |
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