WO2024112166A1 - 전지 모듈 - Google Patents
전지 모듈 Download PDFInfo
- Publication number
- WO2024112166A1 WO2024112166A1 PCT/KR2023/019166 KR2023019166W WO2024112166A1 WO 2024112166 A1 WO2024112166 A1 WO 2024112166A1 KR 2023019166 W KR2023019166 W KR 2023019166W WO 2024112166 A1 WO2024112166 A1 WO 2024112166A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- side sealing
- length
- fixing member
- long side
- battery module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
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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 module including a pouch-type battery cell.
- Secondary batteries can be charged and discharged, so they can be applied to various fields such as digital cameras, mobile phones, laptops, and hybrid cars.
- Secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
- lithium secondary batteries have been manufactured as flexible pouched type battery cells, connecting multiple units. It is used in a modular format.
- a pouch-type battery cell is a method of using a pouch as an exterior material surrounding an electrode assembly.
- the electrode assembly has a stacked structure of a positive electrode plate filled with electrode active material, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate.
- has A positive electrode tab is formed on one side of the positive electrode plate, and a negative electrode tab is formed on one side of the negative electrode plate.
- the tabs are connected to an external circuit by each being connected to an electrode lead.
- This electrode assembly is sealed by a pouch as an exterior material.
- the pouch includes a receiving portion that stores the electrode assembly, and a sealing portion that is located around the receiving portion and seals the electrode assembly. Additionally, electrode leads may protrude from some of the sealing parts, and other parts may be folded to increase energy density to form wing folding parts.
- the wing folding part may be formed by double side folding (DSF). When a predetermined period of time passes, the wing folding part cannot maintain its folded state and a portion may unfold and protrude to the outside. To prevent this, the wing folding part can be fixed using a fixing member such as tape.
- the problem that the present invention aims to solve is to delay the venting of flame or gas generated within a pouch-type battery cell toward the electrode lead and to provide a battery module in which flame or gas vented from the pouch-type battery cell is smoothly vented to the outside. It is provided.
- a battery module includes a module frame; a plurality of pouch-type battery cells arranged side by side within the module frame; And it may include a plurality of vent holes formed through one surface of the module frame.
- the pouch-type battery cell includes an electrode assembly provided with an electrode lead; A receiving portion for accommodating the electrode assembly, a short side seal portion located on a portion of the circumference of the receiving portion and from which the electrode lead protrudes, and a long side seal portion located on another portion of the circumference of the receiving portion and folded toward the receiving portion.
- a battery case containing a unit may include a plurality of fixing members attached to the battery case to fix the long side sealing part in a folded state and arranged to be spaced apart from each other in the longitudinal direction of the long side sealing part.
- the area of each of the vent holes that does not overlap with the fixing member may be wider than the area that overlaps with the fixing member.
- a value obtained by subtracting the total length of the plurality of fixing members from the length of the long side sealing portion may be equal to or greater than the entire length of the short side sealing portion.
- the gap between the plurality of fixing members may be greater than the length of the fixing members.
- the gap between the plurality of fixing members may be larger than each length of the short side sealing part.
- the outermost fixing member among the plurality of fixing members may be positioned to correspond to the end of the storage unit.
- the total length of the plurality of fixing members may be 20% or less of the length of the long side sealing part.
- the total length of the plurality of fixing members may be 17% or less of the length of the long side sealing portion.
- the total length of the plurality of fixing members may be 10% or more of the length of the long side sealing portion.
- Each length of the fixing member may be 3% to 6% or less of the length of the long side sealing part.
- the vent hole is formed long in a direction parallel to the pouch-type battery cell and may have a length longer than the fixing member.
- the length of the vent hole may be three times or more than the length of the fixing member.
- the area where the plurality of fixing members overlap with the plurality of vent holes may be less than 1/3.
- the area of each of the vent holes overlapping with the fixing member may be less than 1/3 of the area that does not overlap with the fixing member.
- the plurality of vent holes include a first vent hole that does not overlap with the fixing member; And it may include a second vent hole that partially overlaps the fixing member.
- the plurality of vent holes are arranged to form a plurality of rows parallel to the stacking direction of the plurality of pouch-type battery cells, and the spacing between the plurality of vent holes in the longitudinal direction of the pouch-type battery cells is equal to that of the fixing member. It can be longer than length.
- Both ends of the vent hole may be rounded and convex outward.
- gas and flame when a fire occurs inside a pouch-type battery cell, gas and flame can be vented preferentially from the long-side sealing portion rather than the short-side sealing portion from which the electrode lead protrudes.
- the time it takes for gas or flame to be vented to the short-side sealing part can be delayed as much as possible, and the flame can be minimized from rapidly spreading to the surroundings and causing continuous thermal runaway of adjacent battery cells.
- the long side sealing portion can be reliably maintained in a folded state by the fixing member.
- gas and flames vented from the long side sealing portion of the pouch-type battery cell can be smoothly discharged through the vent hole of the module frame.
- Figure 1 is a perspective view of a pouch-type battery cell included in a battery module according to an embodiment of the present invention.
- FIG. 2 is a partial cross-sectional view taken along line A-A' of FIG. 1.
- FIG. 3 is a front view of the pouch-type battery cell shown in FIG. 1.
- Figure 4 is a front view showing a modified example of the pouch-type battery cell shown in Figure 1.
- 5A to 5D are front views of a pouch-type battery cell according to a comparative example.
- Figure 6 is a perspective view of a battery module according to an embodiment of the present invention.
- Figure 7 is an exploded perspective view of the battery module shown in Figure 6.
- Figure 8 is a plan view of the battery module shown in Figure 6.
- FIGS. 9A and 9B are diagrams showing the interior of a battery module according to an experimental example.
- Figure 1 is a perspective view of a pouch-type battery cell included in a battery module according to an embodiment of the present invention
- Figure 2 is a partial cross-sectional view taken along line A-A' of Figure 1
- Figure 3 is a pouch-type battery cell shown in Figure 1.
- It is a front view of a battery cell
- FIG. 4 is a front view showing a modified example of the pouch-type battery cell shown in FIG. 1.
- the pouch-type battery cell 100 (hereinafter referred to as 'battery cell') described below may be included in a battery module according to an embodiment of the present invention.
- the battery cell 100 may include an electrode assembly 110, a battery case 120, and a fixing member 130.
- the electrode assembly 110 may be formed with a separator interposed between alternating anodes and cathodes. That is, the electrode assembly 110 may include a plurality of electrodes and a separator interposed between the plurality of electrodes to insulate the plurality of electrodes from each other.
- the electrode assembly 110 may be accommodated together with an electrolyte in the battery case 120, and more specifically, in the storage portion 121, which will be described later.
- the electrode assembly 110 includes a stack type, a jelly roll type, and a stack and folding type, and the type of the electrode assembly 110 is not limited.
- the electrode assembly 110 may include electrode tabs respectively connected to the anode and cathode, and the electrode tab may serve as a path through which electrons can move between the inside and outside of the electrode assembly 110.
- the electrode tab may include a positive electrode tab connected to the positive electrode and a negative electrode tab connected to the negative electrode.
- the anode tab and the cathode tab may protrude in different directions from the electrode assembly 110, but are not limited to this and may protrude in various directions, such as side by side protruding in the same direction from one side.
- the electrode assembly 110 may be provided with an electrode lead 111.
- the electrode lead 111 may electrically connect the electrode assembly 110 to the outside.
- the electrode lead 111 may be connected to the electrode tab of the electrode assembly 110 by spot welding, etc. Additionally, a portion of the electrode lead 111 may be surrounded by an insulating member.
- the insulating member may be positioned to correspond to the short side sealing portion 122 of the battery case 120, which will be described later. Accordingly, the insulating member can insulate the electrode lead 111 and the short side sealing portion 122 and maintain the sealing of the short side sealing portion 122.
- an insulating tape that is easy to attach to the electrode lead 111 and has a relatively thin thickness is often used, but is not limited thereto.
- the electrode lead 111 may be connected to the electrode tab and the other end may protrude to the outside of the battery case 120 .
- the electrode lead 111 may include a positive electrode lead connected to the positive electrode tab and a negative electrode lead connected to the negative electrode tab. Since the positive and negative electrode tabs are formed to protrude in various directions, the positive and negative electrode leads can also extend in various directions.
- the battery case 120 may be formed by molding a laminate sheet, and may accommodate the electrode assembly 110 therein.
- the battery case 120 may include a pair of cases connected by a bridge before being sealed or in a state in which the sealing is released, and at least one of the pair of cases has a recessed storage portion 121. It can be molded, and the surrounding area of the storage part 121 can form a terrace. Also, when the bridge is folded while the electrode assembly 110 is stored in the storage unit 121, the terraces of the pair of cases can come into contact with each other and be sealed on three sides by heat fusion. In this case, the bridge may form a folding part 124, and the terrace may form a sealing part 122 (123).
- the pair of cases may be separate members.
- the terraces of a pair of cases can be in contact with each other and sealed on all four sides by heat fusion.
- the configuration of this cell case is a well-known technology, so a person skilled in the art will be able to easily understand it.
- the battery case 120 includes an accommodating portion 121 that accommodates the electrode assembly 110, a short-side sealing portion 122 located on a portion of the circumference of the accommodating portion 121 and from which the electrode lead 111 protrudes, It is located on another part of the circumference of the receiving part 121 and may include a long side sealing part 123 that is folded toward the receiving part 121.
- the receiving portion 121 may have a pocket shape, and the electrode assembly 111 may be accommodated therein.
- the short side sealing portion 122 may be located on a portion of the circumference of the receiving portion 121.
- the short-side sealing portion 122 may be located on both sides in the full-length direction of the receiving portion 121 and may extend in the full-width direction.
- the electrode lead 111 may protrude out of the battery case 120 through the short side sealing portion 122.
- the long side sealing part 123 may be located on another part of the circumference of the receiving part 121.
- the long side sealing portion 123 may be located on one side of the receiving portion 121 in the full width direction and may extend in the full length direction.
- the long side sealing portion 123 may connect both short side sealing portions 122.
- the long side sealing part 123 may be located on the opposite side of the folding part 124.
- the long side sealing portion 123 may be a portion where the electrode lead 111 does not protrude.
- the long side sealing part 123 is sealed later than the short side sealing part 122, so the corners of the sealing parts 122 and 123 may be included in the long side sealing part 123.
- the long side sealing portion 123 may be folded toward the receiving portion 121 at least once.
- the long side sealing portion 123 may be double side folded (DSF).
- the fixing member 130 may be attached to the battery case 120 to fix the long side sealing portion 123 in a folded state. That is, the fixing member 130 can fix the long side sealing part 123 in a folded state.
- the fixing member 130 may be an adhesive tape.
- a plurality of fixing members 130 may be provided.
- the plurality of fixing members 130 may be arranged at a predetermined distance from each other in the longitudinal direction of the long side sealing portion 123.
- the plurality of fixing members 130 may include a pair of outermost fixing members and at least one intermediate fixing member located between the pair of outermost fixing members.
- the plurality of fixing members 130 it is not limited to this, and as shown in FIG. 4, it is possible for the plurality of fixing members 130 to include only a pair of outermost fixing members.
- the lengths (L) of the plurality of fixing members 130 may be the same, but are not limited thereto.
- the battery case 120 may be damaged and gas may be discharged along with sparks or particles.
- the gas is discharged toward the electrode lead 111, there is a risk that heat and flame can spread quickly to other surrounding battery cells 100, so a configuration is needed to minimize this concern.
- the portion of the long side sealing portion 123 where the fixing member 130 is attached does not swell and it is difficult for gas to vent.
- the portion of the long side sealing portion 123 to which the fixing member 130 is not attached gradually spreads as the internal pressure of the battery case 120 increases, and the internal volume of the battery case 120 increases, resulting in gas venting. The time it takes to do this may be delayed, and the gas may be vented relatively preferentially.
- a portion of the long side sealing portion 123 to which the fixing member 130 is not attached may be provided with a weakly sealed portion or an unsealed portion that is preferentially broken. However, it is not limited to this.
- a value obtained by subtracting the total of the lengths (L) of the plurality of fixing members 130 from the length (L2) of the long side sealing portion 123 may be equal to or greater than the total length of the short side sealing portion 122. That is, the total length of the portion of the long side sealing portion 123 to which the fixing member 130 is not attached may be greater than or equal to the entire length of the short side sealing portion 122.
- the total length of the short side sealing portion 122 may be the sum of the respective lengths L1 of the short side sealing portion 122.
- the part of the long side sealing part 123 to which the fixing member 130 is not attached spreads as the internal pressure of the gas increases, delaying venting of the gas, and also increases the possibility that the gas will be preferentially vented through this part. , it is possible to sufficiently delay the venting of gas toward the short side sealing portion 122.
- the gap between the plurality of fixing members 130 may be larger than the length L of each fixing member 130.
- the gap between the plurality of fixing members 130 may be larger than each length L1 of the short side sealing portion 122. Accordingly, when the internal pressure of the battery case 120 increases, the portion of the long side sealing portion 123 located between the plurality of fixing members 130 easily swells and can be vented with gas preferentially over the short side sealing portion 122. there is.
- the outermost fixing member 130 may be positioned corresponding to the end of the storage unit 121.
- the end of the storage unit 121 may refer to the end in the full length direction.
- the outermost fixing member 130 may be attached to the end of the receiving part 121 or may be attached adjacent to the end of the receiving part 121.
- the total length L of the plurality of fixing members 130 may be 20% or less, preferably 17% or less, of the length L2 of the long side sealing portion 123. If the total length L of the plurality of fixing members 130 is greater than 20% of the length L2 of the long side sealing part 123, the time for gas to be vented to the short side sealing part 122 is sufficient. There is a problem that cannot be delayed.
- the total length (L) of the plurality of fixing members 130 may be 10% or more of the length (L2) of the long side sealing portion 123. If the total length (L) of the plurality of fixing members 130 is less than 10% of the length (L2) of the long side sealing part 123, it is difficult to sufficiently fix the long side sealing part 123 in the folded state. There is.
- each fixing member 130 may be 6% or less of the length L2 of the long side sealing portion 123.
- the portion of the long side sealing portion 123 to which the fixing member 130 is not attached can be easily inflated by an increase in the internal pressure of the battery case 120, and an area through which gas can be vented can be evenly formed.
- each fixing member 130 may be 3% or more of the length L2 of the long side sealing portion 123. As a result, the attachment force of each fixing member 130 can be prevented from falling off by the restoring force of the folded long side sealing portion 123.
- 5A to 5D are front views of a pouch-type battery cell according to a comparative example.
- the fixing member 130a of the battery cell 100a according to the first comparative example is attached to the entire long side sealing portion 123, so if a fire occurs within the battery cell 100a, the short side sealing portion ( 122), the gas can be vented almost immediately, and the venting delay effect is minimal.
- the fixing member 130b of the battery cell 100b according to the second comparative example is formed to be relatively long in each length, so that the portion of the long side sealing portion 123 where the fixing member 130b is not attached is Sufficient length may not be secured. In this case, it is difficult to sufficiently delay the venting of gas to the short side sealing portion 122.
- each of the fixing members 130c of the battery cell 100c according to the third comparative example has a relatively short length, but the number of fixing members 130c is relatively large, so the long side sealing portion 123 The length of the portion where the fixing member 130c is not attached may not be sufficiently secured. Additionally, since the distance between the fixing members 130c is short, it is difficult for the portion between the long side sealing portion 123 and the fixing members 130c to swell and for gas to be vented. In this case, it is more difficult to sufficiently delay gas venting to the short side sealing portion 122.
- the battery cell 100d according to the fourth comparative example may not be provided with a fixing member in the long side sealing portion 123. In this case, it is difficult to maintain the long side sealing portion 123 in a folded state.
- the inventor(s) attaches a heating pad to the center of one side of the storage portion 121 of the battery cell 100 and heats it, and the time taken from the time venting of the gas occurs to the venting of the gas in the short side sealing portion 122 ( Hereinafter, 'delay time') was measured.
- the long side sealing part of the battery case used in each experimental example was treated with double side folding (DSF) at 270 degrees, and the length of the long side sealing part was 548 mm. Additionally, a fixing tape was used as a fixing member.
- the long side sealing part was entirely fixed using a single fixing tape with a length of 548 mm (see Figure 5a).
- the gas was first vented from the short side sealing portion 122, and the delay time was measured to be 0 seconds. In other words, it can be confirmed that there is no flame retardation effect.
- the fixing tape was not attached to the long side sealing portion (see Figure 5d).
- the delay time was measured to be 10 seconds, confirming that it had a flame retardation effect at the battery cell level.
- the long side sealing part is not fixed.
- the battery cell 100 according to an embodiment of the present invention can minimize side effects while having a flame retardation effect (fourth experimental example).
- the battery cell 100 according to the modified example is also useful as the battery cell 100 alone (Third Experimental Example).
- Figure 6 is a perspective view of a battery module according to an embodiment of the present invention
- Figure 7 is an exploded perspective view of the battery module shown in Figure 6
- Figure 8 is a top view of the battery module shown in Figure 6.
- the battery module 10 may include a plurality of battery cells 100 and a module frame 200.
- a plurality of battery cells 100 may be accommodated in the module frame 200.
- a plurality of battery cells 100 may be arranged side by side with each other.
- a plurality of battery cells 100 may be stacked on each other.
- a plurality of battery cells 100 stacked together may form a battery cell stack 140.
- the battery cell stack 140 may be provided with at least one heat dissipation pad 150.
- the heat dissipation pad 150 can dissipate heat from the battery cell 100.
- the heat dissipation pad 150 may be disposed between a plurality of battery cells 100 or may be disposed to cover the outermost battery cell 100.
- the module frame 200 may form the appearance of the battery module 10.
- the module frame 200 may be made of a metal material with high strength.
- the structure of the module frame 200 may vary.
- the module frame 200 may be a mono frame.
- the mono frame may be a metal plate in which the top, bottom, and both sides are integrated.
- the module frame 200 may have a structure in which a U-shaped frame and an upper plate (upper surface) are combined.
- the U-shaped frame may be a metal plate in which a lower plate (bottom) and side plates (both sides) are combined or integrated.
- the structure of the module frame 200 may be provided as a structure in which L-shaped frames are combined, and may also be provided in various structures not described in the above example.
- the module frame 200 may have an internal space, and a battery cell stack 140 may be accommodated in the internal space.
- the module frame 200 may include a top surface, a bottom surface, and both sides. Both ends of the module frame 200 in the overall length direction may be open and may be covered by end plates 400, which will be described later.
- a plurality of vent holes 240 may be formed on one side 210 of the module frame 200, preferably on the upper side. If ignition occurs in the battery cell 100 within the module frame 200, gas and flame can be quickly discharged through the vent hole 240.
- Each vent hole 240 may be formed long in a direction parallel to the battery cell 100.
- Both ends of each vent hole 240 may be rounded and convex outward. As a result, the open area of the vent hole 240 can be increased while reducing stress concentration near the corner of the vent hole 240.
- the plurality of vent holes 240 may be arranged to form a plurality of rows parallel to the stacking direction of the plurality of pouch-type battery cells 100.
- the plurality of vent holes 240 may be arranged in five rows parallel to the stacking direction of the pouch-type battery cells 100. Accordingly, a predetermined gap d may be formed between the two vent holes 240 forming adjacent rows in the longitudinal direction of the pouch-type battery cell 100.
- the battery module 10 may further include a busbar frame 300 and an end plate 400.
- the bus bar frame 300 may be disposed on both sides of the battery cell stack 120 in the full length direction. At least one bus bar 310 may be mounted on the bus bar frame 300, and each bus bar 310 may be connected to the electrode lead 111 of the battery cell 100. The bus bar 310 may be configured to electrically connect a plurality of battery cells 100 to an external device.
- the end plate 400 may be disposed outside the busbar frame 300. That is, the bus bar frame 300 may be disposed between the battery cell stack 120 and the end plate 400.
- the end plate 400 may be coupled to the module frame 200.
- the end plate 400 may cover both open ends of the module frame 200.
- An opening 400H is formed in the end plate 400, and the bus bar 310 can be electrically connected through the opening 400H. That is, the bus bar 310 of one battery module 10 may be electrically connected to another battery module 10 or a battery disconnect unit (BDU) through the opening 400H.
- BDU battery disconnect unit
- each vent hole 240 may not overlap with the fixing member 130, or less than half of its area may overlap with the fixing member 130. Accordingly, the gas vented from the battery cell 100 can be smoothly vented into the vent hole 240.
- the area where the plurality of fixing members 130 overlap with the plurality of vent holes 240 may be less than 1/3. That is, only 1/3 or less of the total area of the plurality of vent holes 240 may overlap with the fixing member 130.
- the area of each of the vent holes 240 that overlaps with the fixing member 130 may be less than 1/3 of the area that does not overlap with the fixing member 130 . That is, only 1/3 or less of the area of each vent hole 240 may overlap with the fixing member 130. As a result, some vent holes 240 are prevented from being blocked by the fixing member 130 and all vent holes 240 are opened evenly, thereby improving the reliability of gas venting.
- the vent hole 240 may have a longer length than the fixing member 130.
- the length of the vent hole 240 may be three times or more than the length (L) of the fixing member 130.
- the distance d between the plurality of vent holes 240 in the longitudinal direction of the battery cell 100 may be equal to or greater than the length L of the fixing member 30 .
- the plurality of vent holes 240 may include a first vent hole 241 that overlaps the fixing member 130 and a second vent hole 242 that does not overlap the fixing member 130. That is, some of the plurality of vent holes 240 may overlap with the fixing member 130, and other parts may not overlap with the fixing member 130. As a result, while maintaining the venting of gas through the plurality of vent holes 240 somewhat smoothly, the plurality of vent holes 240 are formed excessively wide in the module frame 200, so that the rigidity of the module frame 200 is excessively low. You can prevent losing.
- the plurality of vent holes 240 include only the first vent hole 241 or the second vent hole 242. Of course, it is also possible to include only ).
- FIGS. 9A and 9B are diagrams showing the interior of a battery module according to an experimental example.
- the battery module 10 according to an embodiment of the present invention has a reliable flame retardation effect (second experimental example).
- Battery module 100 Pouch-type battery cell
- electrode assembly 111 electrode lead
- module frame 210 one side (of module frame)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
Claims (16)
- 모듈 프레임;상기 모듈 프레임 내에 나란하게 배치된 복수개의 파우치형 전지셀; 및상기 모듈 프레임의 일면에 관통 형성된 복수개의 벤트홀을 포함하고,상기 파우치형 전지셀은,전극 리드가 구비된 전극 조립체;상기 전극 조립체를 수용하는 수납부와, 상기 수납부의 둘레 중 일부에 위치하며 상기 전극 리드가 돌출되는 단변 실링부와, 상기 수납부의 둘레 중 다른 일부에 위치하며 상기 수납부를 향해 폴딩된 장변 실링부를 포함하는 전지 케이스; 및상기 장변 실링부를 폴딩된 상태로 고정하도록 상기 전지 케이스에 부착되며 상기 장변 실링부의 길이 방향에 대해 서로 간격을 이루도록 배열된 복수개의 고정 부재를 포함하고,상기 벤트홀 각각은, 상기 고정부재와 중첩되는 영역보다 상기 고정 부재와 비중첩되는 영역이 더 넓은 전지 모듈.
- 제 1 항에 있어서,상기 장변 실링부의 길이에서 상기 복수개의 고정 부재의 길이의 총합을 뺀 값은, 상기 단변 실링부의 전체 길이 이상인 전지 모듈 .
- 제 1 항에 있어서,상기 복수개의 고정 부재 사이의 간격은, 상기 고정 부재의 길이보다 큰 전지 모듈 .
- 제 1 항에 있어서,상기 복수개의 고정 부재 사이의 간격은, 상기 단변 실링부의 각 길이보다 큰 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 고정 부재 중 최외각 고정 부재는, 상기 수납부의 끝단에 대응되게 위치하는 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 고정 부재의 길이의 총합은, 상기 장변 실링부의 길이의 20 % 이하인 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 고정 부재의 길이의 총합은, 상기 장변 실링부의 길이의 17 % 이하인 전지 모듈.
- 제 6 항 또는 제 7 항에 있어서,상기 복수개의 고정 부재의 길이의 총합은, 상기 장변 실링부의 길이의 10 % 이상인 전지 모듈.
- 제 1 항에 있어서,상기 고정 부재의 각 길이는, 상기 장변 실링부의 길이의 3 % 내지 6 % 이하인 전지 모듈.
- 제 1 항에 있어서,상기 벤트홀은 상기 파우치형 전지셀과 나란한 방향으로 길게 형성되며 상기 고정 부재보다 긴 길이를 갖는 전지 모듈.
- 제 10 항에 있어서,상기 벤트홀의 길이는 상기 고정 부재의 길이의 3배 이상인 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 벤트홀의 전체 면적에 대해, 상기 복수개의 고정 부재가 상기 복수개의 벤트홀과 중첩되는 면적은 1/3 이하인 전지 모듈.
- 제 1 항에 있어서,상기 벤트홀 각각은, 상기 고정부재와 중첩되는 영역이 상기 고정부재와 비중첩되는 영역의 1/3 이하인 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 벤트 홀은,상기 고정 부재와 중첩되는 제1벤트홀; 및상기 고정 부재와 비중첩되는 제2벤트홀을 포함하는 전지 모듈.
- 제 1 항에 있어서,상기 복수개의 벤트홀은, 상기 복수개의 파우치형 전지셀의 적층 방향과 나란한 복수개의 열을 이루도록 배열되고,상기 파우치형 전지셀의 길이 방향에 대한 상기 복수개의 벤트홀 간 간격은, 상기 고정 부재의 길이 이상인 전지 모듈.
- 제 1 항에 있어서,상기 벤트홀의 양 단부는 외측으로 볼록하도록 라운드지게 형성된 전지 모듈.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23895093.5A EP4604286A4 (en) | 2022-11-25 | 2023-11-24 | BATTERY MODULE |
| CN202380080670.6A CN120266324A (zh) | 2022-11-25 | 2023-11-24 | 电池模块 |
| JP2025529863A JP7853522B2 (ja) | 2022-11-25 | 2023-11-24 | 電池モジュール |
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| Application Number | Priority Date | Filing Date | Title |
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| KR20220160853 | 2022-11-25 | ||
| KR10-2022-0160853 | 2022-11-25 | ||
| KR10-2023-0165914 | 2023-11-24 | ||
| KR1020230165914A KR20240078389A (ko) | 2022-11-25 | 2023-11-24 | 전지 모듈 |
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| Publication Number | Publication Date |
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| WO2024112166A1 true WO2024112166A1 (ko) | 2024-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2023/019166 Ceased WO2024112166A1 (ko) | 2022-11-25 | 2023-11-24 | 전지 모듈 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4726827A1 (en) * | 2024-10-10 | 2026-04-15 | Samsung Sdi Co., Ltd. | Secondary battery and method for manufacturing the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113937403A (zh) * | 2021-09-23 | 2022-01-14 | 恒大新能源技术(深圳)有限公司 | 单元模块及电池包 |
| KR20220014160A (ko) * | 2020-07-28 | 2022-02-04 | 에스케이온 주식회사 | 배터리 셀 및 이를 포함하는 배터리 모듈 |
| KR20220018796A (ko) * | 2020-08-07 | 2022-02-15 | 주식회사 엘지에너지솔루션 | 개선된 가스 벤팅 구조를 갖는 전지 모듈 및 이를 포함하는 전지 팩 |
| KR20220021143A (ko) * | 2020-08-13 | 2022-02-22 | 에스케이온 주식회사 | 배터리 모듈 |
| KR20220142279A (ko) * | 2021-04-14 | 2022-10-21 | 주식회사 엘지에너지솔루션 | 전지 모듈 및 이를 포함하는 전지 팩 |
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- 2023-11-24 WO PCT/KR2023/019166 patent/WO2024112166A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220014160A (ko) * | 2020-07-28 | 2022-02-04 | 에스케이온 주식회사 | 배터리 셀 및 이를 포함하는 배터리 모듈 |
| KR20220018796A (ko) * | 2020-08-07 | 2022-02-15 | 주식회사 엘지에너지솔루션 | 개선된 가스 벤팅 구조를 갖는 전지 모듈 및 이를 포함하는 전지 팩 |
| KR20220021143A (ko) * | 2020-08-13 | 2022-02-22 | 에스케이온 주식회사 | 배터리 모듈 |
| KR20220142279A (ko) * | 2021-04-14 | 2022-10-21 | 주식회사 엘지에너지솔루션 | 전지 모듈 및 이를 포함하는 전지 팩 |
| CN113937403A (zh) * | 2021-09-23 | 2022-01-14 | 恒大新能源技术(深圳)有限公司 | 单元模块及电池包 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4726827A1 (en) * | 2024-10-10 | 2026-04-15 | Samsung Sdi Co., Ltd. | Secondary battery and method for manufacturing the same |
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| JP2025538248A (ja) | 2025-11-26 |
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