WO2024117695A1 - 배터리 팩 - Google Patents
배터리 팩 Download PDFInfo
- Publication number
- WO2024117695A1 WO2024117695A1 PCT/KR2023/019152 KR2023019152W WO2024117695A1 WO 2024117695 A1 WO2024117695 A1 WO 2024117695A1 KR 2023019152 W KR2023019152 W KR 2023019152W WO 2024117695 A1 WO2024117695 A1 WO 2024117695A1
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- Prior art keywords
- cross beam
- lower cross
- upper cross
- groove
- base plate
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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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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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
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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
- 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
- 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
- H01M50/271—Lids or covers for the racks or secondary casings
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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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
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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
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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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
- H01M50/507—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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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 more specifically, to a battery pack with a structure that allows cell stacks or battery modules to be installed in close contact with a partition wall without interference from weld beads and to regulate their mounting positions.
- the present invention provides a battery pack suitable for a cell-to-pack (CTP) structure in which the cell stack is directly installed in the battery pack.
- CTP cell-to-pack
- battery packs were manufactured with a structure in which a plurality of battery modules containing a plurality of cell stacks were accommodated in a module housing in a pack case.
- thermal resin is applied twice between the cell stack and the module housing, and between the module housing and the pack case, which increases manufacturing costs and reduces cooling performance.
- module parts for constructing the battery module and additional parts required for mounting the pack case were required, increasing component costs.
- the module housing cannot be installed closely to the partition wall due to the weld bead generated on the partition wall, which reduces the space utilization of the pack case and reduces the energy density of the battery pack. did.
- the structure of the battery pack can be simplified, space utilization and energy density can be improved by eliminating the interference of weld beads, the position of the cell stack can be regulated even in a cell-to-pack structure without a module housing, and multiple There is a need to develop technology that can effectively install cell stacks in pack cases.
- the present invention can easily perform the welding operation of joining a cross beam to a base plate, can apply uniform surface pressure to a plurality of cell stacks, and has a loading jig that handles a plurality of cell stacks as one body to form a cross beam.
- One purpose is to provide a pack case that can perform work stably without interference.
- Another purpose of the present invention is to provide a pack case that can solve the problem of cell stack interference by weld beads that inevitably occurs when welding a cross beam to a base plate.
- Another object of the present invention is to provide a pack case with a simplified configuration, for example, a pack case capable of regulating the position of the cell stack even in a cell-to-pack structure without a separate module housing.
- the present invention relates to a pack case, and in one example, it includes a base plate, a side plate that is coupled along the circumference of the base plate to form an accommodation space therein, and the accommodation space inside the base plate is horizontally divided. It includes a lower cross beam coupled to the base plate, and an upper cross beam coupled to the lower cross beam, wherein the lower cross beam and the upper cross beam are each provided with a binding groove that regulates the installation position of the cell stack. do.
- the upper cross beam is coupled upward to the lower cross beam to form one cross beam.
- the lower cross beam has a first uneven structure in which concave portions and protrusions are repeated with respect to the coupling direction of the upper cross beam, and the upper cross beam has a shape complementary to the first uneven structure.
- a second uneven structure may be provided.
- the lower cross beam may be coupled to the base plate by welding, and the upper cross beam may be coupled to the lower cross beam with bolts.
- the lower cross beam and the upper cross beam may be made of different materials, and the upper cross beam may be made of a lighter material than the lower cross beam.
- the lower cross beam may have at least one concave welding groove on the boundary with the base plate.
- the welding grooves may be provided on both sides of the lower cross beam.
- Each welding groove provided on both sides of the lower cross beam may be distributed so that at least a portion of the welding grooves do not overlap in the direction in which they face each other.
- the lower cross beam is welded to the base plate through the weld groove, and the weld bead formed in the weld groove may not protrude outside the lower cross beam.
- the binding groove may be formed in the form of an open groove with the coupling surface of the lower cross beam and the upper cross beam as an opening.
- the binding groove may be formed in the form of a hole separated from each other bordering the coupling surface of the lower cross beam and the upper cross beam, and may also be formed in the form of a hole that is separated from the coupling surface of the lower cross beam and the upper cross beam. It may include a guide groove connected from the surface to the hole.
- the present invention can provide a battery pack including a pack case having the above configuration, and a plurality of cell stacks mounted in divided accommodating spaces of the pack case.
- the plurality of cell stacks includes a bus bar frame assembly coupled to the battery cell stack at both ends where leads protrude, and the bus bar frame assembly is fastened to each binding groove of the lower cross beam and the upper cross beam. It may be provided with a protrusion structure.
- the binding groove is formed in the form of an open groove with the coupling surface of the lower cross beam and the upper cross beam as an opening, and correspondingly, the protrusion structure has the open grooves of the lower and upper cross beams. It can be provided as a pin structure corresponding to a connected form.
- the binding groove is formed in the form of a hole separated from each other bordering the coupling surface of the lower cross beam and the upper cross beam, and correspondingly, the protrusion structure is formed in the hole of the lower cross beam and the upper cross beam. It may be provided as a snap-fit joint including a cantilever lug to be fastened.
- the binding groove includes a guide groove connected from the coupling surface of the lower cross beam and the upper cross beam to the hole, and the protrusion structure allows the cantilever lug to slide on the guide groove surface and be fastened to the hole.
- the protrusion structure may be disposed on both sides of the bus bar frame assembly facing each binding groove of the lower cross beam and the upper cross beam.
- bus bar frame assembly may include an insulating cover coupled to the front surface.
- thermal resin may be interposed on a contact surface between the plurality of cell stacks and the base plate.
- the pack case of the present invention has a two-layer structure of a lower cross beam in which one cross beam is coupled to the base plate, and an upper cross beam in which one cross beam is coupled upward to the lower cross beam.
- the cross beam has a two-layer combined structure, the accessibility of the welding tool tip is improved, making welding of the lower cross beam to the base plate easier, and by seating the multiple cell stacks in the pack case before assembling the upper cross beam.
- the workability of the loading jig is improved.
- the upper cross beam which does not involve welding work on the base plate, is made of a lightweight heterogeneous material, such as engineering plastic, which can contribute to reducing the weight of the battery pack.
- the pack case of the present invention is provided with binding grooves that regulate the installation position of the cell stack on each of the lower and upper cross beams, and thus has a simplified pack case structure, such as a cell-to-pack structure without a separate module housing. It is also possible to regulate the position of the cell stack, which improves the productivity and safety of the battery pack.
- the lower cross beam is provided with a first concavo-convex structure, so that the gripper of the loading jig can firmly grasp and enter the cell stack without causing interference with the lower cross beam, Additionally, the cell stack can be placed stably on the base plate without impact.
- FIG. 1 is a perspective view of a pack case according to an embodiment of the present invention.
- Figure 2 is a perspective view showing the upper cross beam separated from the pack case of Figure 1.
- Figure 3 is a diagram showing the combined structure of the lower and upper cross beams.
- Figure 4 is a cross-sectional view taken along line "A-A" in Figure 3.
- Figure 5 is a perspective view showing the welded structure of the lower cross beam to the base plate.
- Figure 6 is a plan view showing welding points of the lower cross beam to the base plate.
- Figure 7 is a view showing one embodiment of a cross beam provided with a binding groove.
- Figure 8 is a view showing another embodiment of a cross beam having a binding groove.
- FIG. 9 is a diagram showing a configuration in which a plurality of cell stacks are mounted on a pack case including the cross beam of FIG. 7.
- FIG. 10 is an enlarged view showing the structure in which the protrusion structure of the bus bar frame assembly is coupled to the binding groove of FIG. 7.
- FIG. 11 is an enlarged view showing the structure in which the protrusion structure of the bus bar frame assembly is coupled to the binding groove of FIG. 8.
- FIG. 12 is a perspective view of a battery pack according to one embodiment of the present invention.
- FIG. 13 is a cross-sectional view taken along line “B-B” in FIG. 12.
- Figure 14 is a perspective view showing an embodiment in which the gripper of a loading jig holding a plurality of cell stacks enters the lower cross beam.
- Figure 15 is a cross-sectional view showing the loading jig of Figure 14 entering the lower cross beam.
- Figure 16 is a cross-sectional view showing the process of removing a loading jig after seating a plurality of cell stacks.
- Figure 17 is a cross-sectional view showing a state in which the upper cross beam is fastened after the loading jig is removed.
- the present invention relates to a pack case, and in one example, it includes a base plate, a side plate that is coupled along the circumference of the base plate to form an accommodation space therein, and the accommodation space inside the base plate is horizontally divided. It includes a lower cross beam coupled to the base plate, and an upper cross beam coupled to the lower cross beam, wherein the lower cross beam and the upper cross beam are each provided with a binding groove that regulates the installation position of the cell stack. do.
- the upper cross beam is coupled upward to the lower cross beam to form one cross beam.
- the pack case of the present invention has a two-layer structure of a lower cross beam in which one cross beam is coupled to the base plate, and an upper cross beam in which one cross beam is coupled upward to the lower cross beam.
- the cross beam has a two-layer combined structure, the accessibility of the welding tool tip is improved, making welding of the lower cross beam to the base plate easier, and by seating the multiple cell stacks in the pack case before assembling the upper cross beam.
- the workability of the loading jig is improved.
- the upper cross beam which does not involve welding work on the base plate, is made of a lightweight heterogeneous material, such as engineering plastic, which can contribute to reducing the weight of the battery pack.
- the pack case of the present invention is provided with binding grooves on each of the lower and upper cross beams to regulate the installation position of the cell stack, which allows the position of the cell stack to be regulated even in a cell-to-pack structure without a separate module housing. This improves the productivity and safety of the battery pack.
- Figure 1 is a perspective view of the pack case 100 according to an embodiment of the present invention
- Figure 2 is a perspective view showing a state in which the upper cross beam 136 is separated from the pack case 100 of Figure 1. 1 and 2, the overall configuration of the pack case 100 according to an embodiment of the present invention will be described.
- the present invention relates to a pack case 100 that equally divides and accommodates a plurality of cell stacks 210.
- the cell stack 210 is a completed battery cell capable of charging and discharging as a secondary battery, and is used in this specification in a comprehensive sense regardless of external distinction such as a pouch-type battery or a square-shaped battery.
- the plurality of cell stacks 210 constitute a battery module stored in one housing and be mounted on the pack case 100, but in particular, the pack case 100 of the present invention is used as a module housing, etc.
- a plurality of cell stacks 210 are shown in the drawing as a simple collection of pouch-type batteries.
- the illustrated pack case 100 includes a base plate 110 and a side plate 120 that is coupled along the circumference of the base plate 110 to form a receiving space therein. And, as a partition member dividing the receiving space inside the base plate 110, it is provided with a cross beam 130 that is coupled to the base plate 110 in the transverse direction, based on the drawing.
- the cross beam 130 of the pack case 100 has a length corresponding to the transverse width of the base plate 110, and thus both ends of the cross beam 130 contact the side plate 120. It is adjacent to the inside.
- the cross beam 130 includes a lower cross beam 132 directly coupled to the base plate 110 to laterally divide the receiving space inside the base plate 110, and a lower cross beam 132. It consists of two upper cross beams 136 coupled to.
- the upper cross beam 136 is coupled upward with respect to the lower cross beam 132, that is, the upper cross beam 136 is aligned and overlapped above the lower cross beam 132, thereby forming one cross beam 130.
- It consists of a two-layer structure that forms.
- the pack case 100 of the present invention has many advantages. For example, since only the lower cross beam 132 needs to be joined to the base plate 110, the accessibility of the welding tool tip is improved as the height of the cross beam 130 is lowered, making welding work on the lower cross beam 132 possible. It becomes easier. In addition, since the plurality of cell stacks 210 can be mounted in the pack case 100 before assembling the upper cross beam 136, the problem of interference with the cross beam 130 is reduced. The workability of the loading jig 300, which handles 210 at once, is improved.
- the upper cross beam 136 which does not involve welding work on the base plate 110, can be made of a lightweight dissimilar material, for example, the lower cross beam 132 can be welded.
- the upper cross beam 136 can be made of a metal material such as stainless steel, and the upper cross beam 136 can be made of a lighter engineering plastic, thereby contributing to reducing the weight of the battery pack 200.
- FIG. 3 is a diagram illustrating an embodiment of the combined structure of the lower and upper cross beams 132 and 136
- FIG. 4 is a cross-sectional view taken along line “A-A” of FIG. 3.
- the lower cross beam 132 has a first uneven structure 133 in which concave portions 133-1 and protrusions 133-2 are repeated in the upward coupling direction of the upper cross beam 136. is provided, and correspondingly, the upper cross beam 136 is provided with a second uneven structure 137 that is complementary to the first uneven structure 133.
- the fact that the first uneven structure 133 and the second uneven structure 137 have a complementary shape means that the concave portion 133-1 of the first uneven structure 133 and the second uneven structure 137 This means that the protrusion 137-2, the protrusion 133-2 of the first uneven structure 133, and the concave part 137-1 of the second uneven structure 137 form a type of meshing structure facing each other. It is done.
- the complementary uneven structures 133 and 137 the coupling position of the upper cross beam 136 with respect to the lower cross beam 132 is set at one, so that the lower and upper cross beams 132 and 136 are accurately aligned.
- the first concavo-convex structure 133 of the lower cross beam 132 is advantageously used to avoid interference with the loading jig 300.
- the lower cross beam 132 may be coupled to the base plate 110 by welding, and the upper cross beam 136 may be coupled to the lower cross beam 132 with bolts 138, such as
- the separated two-layer bonding structure makes it possible to make the upper cross beam 136 from a lightweight, different material. Referring to FIG. 3, considering the effective screwing depth of the bolt 138, it is advantageous to have a short access path from the upper cross beam 136 to the lower cross beam 132, so that the second uneven structure 137 The bolt 138 is fastened in an area where the concave portion 137-1 is coupled to the convex portion of the first uneven structure 133.
- the lower and upper cross beams 132 and 136 basically have a hollow structure and are provided with a rib structure connecting both side walls to reinforce rigidity. Lightweight can be achieved through the hollow structure of the lower and upper cross beams 132 and 136, and heat generated from any cell stack 210 in the pack case 100 is transmitted between the cross beams 130 in the form of conduction. It is also advantageous to delay heat propagation due to thermal runaway by suppressing movement to other cell stacks 210 placed there.
- FIG. 5 is a perspective view showing the welded structure of the lower cross beam 132 to the base plate 110
- FIG. 6 is a plan view showing welding points of the lower cross beam 132 to the base plate 110.
- the cross beam 130 is an important member that reinforces the lateral rigidity of the pack case 100, and is connected to the base plate 110 by welding or bolting. Welding is widely used considering fastening strength, productivity, weight reduction, etc. In this case, the weld bead 135 formed on the welded surface of the cross beam 130 and the base plate 110 improves the safety and capacity of the battery pack 200. causes problems.
- a plurality of cell stacks 210 are mounted inside the cross beam 130.
- the cell stacks 210 interfere with the weld bead 135 and cause vibration or
- the cell stack 210 that interferes with the weld bead 135 is easily damaged or broken, which may cause serious safety problems such as fire.
- a design that avoids interference from the weld bead 135 reduces the energy density of the battery pack 200 by creating dead space.
- the lower cross beam 132 has at least one concave welding groove 134 on the boundary with the base plate 110.
- the lower cross beam 132 is welded to the base plate 110 through the weld groove 134, and thus a weld bead 135 is formed in the concave space within the weld groove 134, and is formed within the weld groove 134.
- the formed weld bead 135 does not protrude outside the lower cross beam 132. As a result, it is possible to prevent the interference of the cell stack 210 by the weld bead 135 and/or the occurrence of dead space due to avoidance design.
- the size of the welding groove 134 can be designed in consideration of the size of the welding tool tip and the size of the welding bead 135 according to the welding method.
- the tip size is small and the size of the weld bead 135 is about 2 to 3 mm, so the size of the weld groove 134 can be made correspondingly to a height and depth of several millimeters. there is.
- welding grooves 134 may be provided on both sides of the lower cross beam 132.
- each welding groove 134 provided on both sides of the lower cross beam 132 can be arranged to stagger each other so that at least some portions do not overlap along the direction facing each other. there is. Since the welding grooves 134 are evenly distributed on both sides of the lower cross beam 132, stable welding strength can be secured while reducing the risk of deformation due to welding heat.
- FIGS. 7 and 8 show a pack case 100 according to a third embodiment of the present invention.
- the third embodiment of FIGS. 7 and 8 is characterized in that the lower cross beam 132 and the upper cross beam 136 are each provided with a binding groove 140 that regulates the installation position of the cell stack 210. do.
- the cells are stacked using the binding groove 140 of the cross beam 130.
- the location of ritual installation can be tightly regulated.
- the plurality of cell stacks 210, whose positions are regulated, are installed at precise positions and do not easily shake even during use of the battery pack 200, thereby improving the stability of the battery pack 200.
- Figure 7 shows an embodiment of the binding groove 140, in which the binding groove 140 is formed in the form of an open groove 142 with the coupling surface of the lower cross beam 132 and the upper cross beam 136 as an opening. do.
- the binding groove 140 in FIG. 7 is formed in the form of a long groove in the lower cross beam 132 and the upper cross beam 136, and one side of each long groove, that is, the lower and upper cross beams 132 , 136), the joining surface forms an open inlet.
- Figure 8 shows another embodiment of the binding groove 140, in which the binding groove 140 is in the form of holes 144 separated from each other with a boundary between the coupling surfaces of the lower cross beam 132 and the upper cross beam 136. is formed That is, unlike the embodiment of FIG. 7, even if the lower and upper cross beams 132 and 136 are combined, the pair of binding grooves 140 are not connected to each other.
- the shape of the hole 144 is shown as a semicircular hole in FIG. 8, but is not limited thereto, and various other shapes not shown in the drawing, such as circular holes or square holes, are also applicable.
- the coupling groove 140 of the separated structure of FIG. 8 may include a guide groove 145 connected from the coupling surface of the lower cross beam 132 and the upper cross beam 136 to the hole 144.
- the guide groove 145 is intended to facilitate the sliding of the protrusion structure 214 fastened to the binding groove 140, which will be described further below.
- FIGS. 9 and 10 are diagrams for explaining a configuration in which the installation positions of the plurality of cell stacks 210 are regulated by the binding groove 140 of FIG. 7 .
- FIG. 9 shows a configuration in which a plurality of cell stacks 210 are mounted on the pack case 100 of the third embodiment.
- the illustrated cell stack 210 includes a bus bar frame assembly 212 coupled to the battery cell stack 210 at both ends where the leads protrude (both ends in the transverse direction, based on the drawing), and the bus bar frame assembly (212) is provided with a protrusion structure 214 that is fastened to each binding groove 140 of the lower cross beam 132 and the upper cross beam 136.
- the protrusion structure 214 provided on the bus bar frame assembly 212 is the open groove 142 of the lower and upper cross beams 132 and 136. It forms a pin structure 215 corresponding to this one connected form.
- FIG. 10 shows a structure in which the bus bar frame assembly 212 coupled to the plurality of cell stacks 210 is coupled to the binding groove 140 of FIG. 7.
- the plurality of cell stacks 210 are not shown in FIG. 10, and the adjacent cell stacks 210 on both sides sharing one cross beam 130 are bonded in the same manner. Its position is regulated by the groove 140.
- the cross beam 130 has only the lower cross beam 132 installed in the pack case 100, and the open groove (140) is the binding groove 140 of the lower cross beam 132.
- the opening of 142) is open upward. Accordingly, when the plurality of cell stacks 210 are inserted between the lower cross beams 132 from top to bottom, about half of the pin structure 215 of the bus bar frame assembly 212 is inserted into the open groove 142 and , As fastening between the pin structure 215 and the open groove 142 occurs at both ends of the multi-cell stack 210, the installation positions of the multi-cell stack 210 are aligned.
- FIG. 11 shows a structure in which the bus bar frame assembly 212 is coupled to the coupling groove 140 of FIG. 8.
- the embodiment of FIG. 8 is also the same in that the position of the multi-cell stack 210 is regulated by the combination of the lower and upper cross beams 132 and 136, except that the protrusion structure for the binding groove 140 There is a difference in the fastening method of (214).
- a binding groove 140 is formed in the form of a hole 144 separated from each other bordering the coupling surface of the lower cross beam 132 and the upper cross beam 136, and correspondingly, the bus bar
- the protruding structure 214 of the frame assembly 212 has a snap-fit joint 216 including a cantilever lug 217 that is fastened to the hole 144 of the lower and upper cross beams 132 and 136. Consists of.
- the binding groove 140 is formed in the form of an independent hole 144 without a cutout
- the cantilever lug 217 of the protrusion structure 214 composed of the snap-fit joint 216 is elastically bent to form a protrusion at the end of the cantilever. may enter the hole 144 and be bound.
- the engagement groove 140 has a guide groove 145 in the lower and upper cross beams 132 and 136, respectively, connected from the engagement surface to the hole 144. ) may be provided, and accordingly, the cantilever lug 217 of the snap-fit joint 216 can be smoothly fastened to the hole 144 by sliding on the surface of the guide groove 145.
- the protrusion structure 214 of the plurality of cell stacks 210 is formed on the lower and upper cross beams 132 and 136. It may be desirable to place them on both sides of the bus bar frame assembly 212 facing each binding groove 140.
- the bus bar frame assembly 212 may include an insulating cover 218 coupled to the front surface. The insulating cover 218 is a cover member for electrically and physically protecting the front side of the bus bar frame assembly 212 facing the side plate 120 or another cell stack 210.
- the insulating cover 218 can also be configured to be easily attached to and removed from the bus bar frame assembly 212 by a snap-fit structure, and the insulating cover 218 has a protrusion structure 214 disposed on the side of the bus bar frame assembly 212. ) is designed not to block or obscure (see Figure 9).
- FIG 12 is a perspective view of the battery pack 200 according to one embodiment of the present invention.
- a plurality of cell stacks 210 are mounted in each of the plurality of accommodation spaces divided by the cross beam 130, thereby forming a battery pack 200.
- the illustrated embodiment is a battery pack 200 of a cell-to-pack structure in which a plurality of cell stacks 210 are gathered between bus bar frame assemblies 212 for electrical connection without a separate module housing, and the internal structure is The lead that closes the upper surface is omitted for the purpose of showing.
- FIG. 13 is a cross-sectional view taken along the line “B-B” of FIG. 12, and an insulating sheet or compression pad 220 is interposed between the lower and upper cross beams 132 and 136 and the contact surface of the cell stack 210.
- the insulating sheet and compression pad are referred to by distinguishing between a thin member as an insulating sheet and a relatively elastic thick member as a compression pad, and both have electrical insulation and layer resistance and abrasion resistance for the cell stack 210.
- FIGS. 14 to 17 show a series of processes for manufacturing the battery pack 200 using the pack case 100 of the present invention described above through the first to third embodiments.
- the manufacturing method of the battery pack 200 includes the pack case 100 of the present invention, that is, the base plate 110, and a side plate ( 120), and a lower cross beam 132 coupled to the base plate 110 to partition the receiving space inside the base plate 110.
- the second step is a step of seating a plurality of cell stacks 210 in the receiving space divided by the lower cross beam 132, and in particular, handling a plurality of cell stacks 210 at once for productivity.
- a loading jig 300 can be used.
- Figure 14 is a perspective view showing an embodiment in which the gripper 310 of the loading jig 300 holding the plurality of cell stacks 210 enters the lower cross beam 132
- Figure 15 is a loading diagram of Figure 14 This is a cross-sectional view showing the jig 300 entering the lower cross beam 132.
- the pack case 100 prepared in the first step has a concave portion 133-1 and a lower cross beam 132 with respect to the coupling direction of the upper cross beam 136. It is preferable that the protrusion 133-2 has a repeated first uneven structure 133.
- the loading jig 300 is provided with a gripper 310 that grips the plurality of cell stacks 210 as one body.
- the gripper 310 of the loading jig 300 is provided as a pair to grip both sides of the cell stack 210 parallel to the lower cross beam 132, and also grips the other side of the cell stack 210.
- a gripper 310 for gripping may be additionally provided.
- the gripper 310 that grips both sides of the cell stack 210 facing the lower cross beam 132 is formed in the concave portion 133- 1) It may include a plurality of feet corresponding to the location (or location and number). Accordingly, the gripper 310 of the loading jig 300 enters the concave portion 133-1 of the first uneven structure 133 and seats the plurality of cell stacks 210 held on the base plate 110. I order it.
- the depth of the concave portion 133-1 of the first uneven structure 133 is deeper than half of the total height of the cell stack 210. Accordingly, the gripper 310 of the loading jig 300 can secure a grip area of at least half the total height of the cell stack 210. In other words, since the lower cross beam 132 is provided with the first concavo-convex structure 133, the gripper 310 of the loading jig 300 can firmly hold the cell stack without causing interference with the lower cross beam 132. It is possible to enter by holding 210, and also the cell stack 210 can be stably placed on the base plate 110 without impact.
- the cross beam 130 of the pack case 100 is provided with the binding groove 140 described in the third embodiment, and the plurality of cell stacks 210 have a protrusion structure 214 fastened to the binding groove 140. ), the installation position of the plurality of cell stacks 210 mounted on the pack case 100 by the loading jig is accurately controlled.
- reference numeral 230 refers to thermal resin, which serves to improve the heat dissipation performance of the battery pack 200 by promoting conductive heat transfer between the base plate 110 and the cell stack 210.
- thermal resin 230 in the cell-to-pack structure battery pack 200, when the lower surface of the cell stack 210 is open, the thermal resin 230 is connected to the base plate 110 and the cell stack 210 without an intermediate structure such as a module housing. More smooth heat dissipation is possible by directly mediating the conduction heat transfer between the two devices.
- the thermal resin 230 is evenly applied to the base plate 110 with an appropriate thickness before mounting the cell stack 210 in the pack case 100.
- FIG. 16 is a cross-sectional view showing the process of removing the loading jig 300 after seating the plurality of cell stacks 210. Since the thickness of the gripper 310 is thinner than the thickness of the lower cross beam 132, the base plate ( 110), the gripper 310 may retreat, release the grip state, and then leave upward of the lower cross beam 132.
- the lower cross beam on which the plurality of cell stacks 210 are seated is installed.
- sufficient surface pressure can be formed for the entire height of the cell stack 210.
- the swelling phenomenon that occurs while the cell stack 210 is charging and discharging can be effectively suppressed.
- the above-described insulating sheet or compression pad 220 may be attached to the grip surface of the plural cell stack 210 held by the loading jig 300, and this insulating sheet or compression pad 220 also swells. It can help suppress the ring phenomenon.
- the above-described second and third steps that is, the second step of seating the plurality of cell stacks 210 in the receiving space partitioned by the lower cross beam 132, and the plurality of cell stacks 210
- the third step of coupling the upper cross beam 136 to the seated lower cross beam 132 is repeated, and the fourth step of mounting the plurality of cell stacks 210 in all the accommodation spaces is performed, thereby performing the present invention.
- the battery pack 200 with the cell stack 210 mounted on the pack case 100 is completed.
- pack case 110 base plate
- Protrusion structure 215 Pin structure
- Insulating cover 220 Insulating sheet or compression pad
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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)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (20)
- 베이스 플레이트;상기 베이스 플레이트의 둘레를 따라 결합하여 그 내부에 수용공간을 형성하는 사이드 플레이트;상기 베이스 플레이트 안쪽의 수용공간을 횡으로 구획하도록 상기 베이스 플레이트에 결합하는 하부 크로스 빔; 및상기 하부 크로스 빔에 결합하는 상부 크로스 빔;을 포함하고,상기 하부 크로스 빔과 상부 크로스 빔에는 각각 셀 적층체의 설치 위치를 규제하는 결속 홈이 구비된, 팩 케이스.
- 제1항에 있어서,상기 하부 크로스 빔에 대해 상기 상부 크로스 빔이 상방 결합하여 하나의 크로스 빔을 형성하는, 팩 케이스.
- 제1항에 있어서,상기 하부 크로스 빔은, 상기 상부 크로스 빔의 결합 방향에 대해 오목부와 돌출부가 반복된 제1 요철구조를 구비하고,상기 상부 크로스 빔은 상기 제1 요철구조에 상보하는 형태의 제2 요철구조를 구비하는, 팩 케이스.
- 제3항에 있어서,상기 하부 크로스 빔은 상기 베이스 플레이트에 대해 용접으로 결합하고,상기 상부 크로스 빔은 상기 하부 크로스 빔에 대해 볼트로 결합하는, 팩 케이스.
- 제4항에 있어서,상기 하부 크로스 빔과 상부 크로스 빔은 서로 이종재질로 이루어지고,상기 상부 크로스 빔은 상기 하부 크로스 빔보다 경량 재질로 이루어진, 팩 케이스.
- 제1항에 있어서,상기 하부 크로스 빔은,상기 베이스 플레이트와의 경계 상에 적어도 하나 이상의 오목한 용접홈을 구비하는, 팩 케이스.
- 제6항에 있어서,상기 용접홈은,상기 하부 크로스 빔의 양측으로 구비되는, 팩 케이스.
- 제7항에 있어서,상기 하부 크로스 빔의 양측으로 구비되는 각 용접홈은,서로 대면하는 방향을 따라 적어도 일부분이 중첩되지 않도록 분산 배치되는, 팩 케이스.
- 제8항에 있어서,상기 하부 크로스 빔은 상기 용접홈을 통해 상기 베이스 플레이트에 대해 용접되고,상기 용접홈 안에 형성된 용접 비드는 상기 하부 크로스 빔 외부로 돌출되지 않는, 팩 케이스.
- 제1항에 있어서,상기 결속 홈은,상기 하부 크로스 빔과 상부 크로스 빔의 결합면을 개구부로 하는 개방홈의 형태로 형성되는, 팩 케이스.
- 제1항에 있어서,상기 결속 홈은,상기 하부 크로스 빔과 상부 크로스 빔의 결합면을 경계로 서로 분리된 구멍의 형태로 형성되는, 팩 케이스.
- 제11항에 있어서,상기 결속 홈은,상기 하부 크로스 빔과 상부 크로스 빔의 결합면에서부터 상기 구멍까지 연결된 유도 그루브를 포함하는, 팩 케이스.
- 제1항 내지 제9항 중 어느 한 항에 따른 팩 케이스; 및상기 팩 케이스의 분할된 수용공간에 장착되는 복수의 셀 적층체;를 포함하는, 배터리 팩.
- 제13항에 있어서,상기 복수의 셀 적층체는,리드가 돌출된 양단부에서 상기 전지셀 적층체와 결합하는 버스바 프레임 어셈블리를 포함하고,상기 버스바 프레임 어셈블리는 상기 하부 크로스 빔과 상부 크로스 빔의 각 결속 홈에 체결되는 돌기 구조를 구비하는, 배터리 팩.
- 제14항에 있어서,상기 결속 홈은, 상기 하부 크로스 빔과 상부 크로스 빔의 결합면을 개구부로 하는 개방홈의 형태로 형성되고,상기 돌기 구조는, 상기 하부 및 상부 크로스 빔의 개방홈이 하나로 연결된 형태에 대응하는 핀 구조체인, 배터리 팩.
- 제14항에 있어서,상기 결속 홈은, 상기 하부 크로스 빔과 상부 크로스 빔의 결합면을 경계로 서로 분리된 구멍의 형태로 형성되고,상기 돌기 구조는, 상기 하부 및 상부 크로스 빔의 구멍에 체결되는 캔틸레버 러그를 포함하는 스냅-핏 조인트인, 배터리 팩.
- 제16항에 있어서,상기 결속 홈은, 상기 하부 크로스 빔과 상부 크로스 빔의 결합면에서부터 상기 구멍까지 연결된 유도 그루브를 포함하고,상기 돌기 구조는, 상기 캔틸레버 러그가 상기 유도 그루브 표면을 활주하여 상기 구멍에 체결되는, 배터리 팩.
- 제14항에 있어서,상기 돌기 구조는,상기 하부 크로스 빔과 상부 크로스 빔의 각 결속 홈에 마주보는 상기 버스바 프레임 어셈블리의 양 측면에 배치되는, 배터리 팩.
- 제18항에 있어서,상기 버스바 프레임 어셈블리는,그 전면에 결합하는 절연 커버를 포함하는, 배터리 팩.
- 제13항에 있어서,상기 복수의 셀 적층체와 상기 베이스 플레이트의 접촉면에는 써멀 레진이 개재되는, 배터리 팩.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024546181A JP2025505008A (ja) | 2022-12-02 | 2023-11-24 | バッテリーパック |
| EP23898226.8A EP4459766A4 (en) | 2022-12-02 | 2023-11-24 | BATTERY PACK |
| US18/836,933 US20250141023A1 (en) | 2022-12-02 | 2023-11-24 | Battery Pack |
| CN202380020535.2A CN118661324A (zh) | 2022-12-02 | 2023-11-24 | 电池组 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20220167142 | 2022-12-02 | ||
| KR10-2022-0167142 | 2022-12-22 | ||
| KR1020230035421A KR20240082976A (ko) | 2022-12-02 | 2023-03-17 | 배터리 팩 |
| KR10-2023-0035421 | 2023-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024117695A1 true WO2024117695A1 (ko) | 2024-06-06 |
Family
ID=91324529
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/019152 Ceased WO2024117695A1 (ko) | 2022-12-02 | 2023-11-24 | 배터리 팩 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250141023A1 (ko) |
| EP (1) | EP4459766A4 (ko) |
| JP (1) | JP2025505008A (ko) |
| WO (1) | WO2024117695A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230387081A1 (en) * | 2021-04-16 | 2023-11-30 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor structure and manufacturing method thereof |
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- 2023-11-24 WO PCT/KR2023/019152 patent/WO2024117695A1/ko not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4459766A1 (en) | 2024-11-06 |
| EP4459766A4 (en) | 2025-07-16 |
| JP2025505008A (ja) | 2025-02-19 |
| US20250141023A1 (en) | 2025-05-01 |
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