Cylindrical battery cell, battery pack and vehicle including the same, and collector plate.

Description

1 / 30 Cylindrical battery cell, battery pack and vehicle including the same, and collector plate. FIELD OF TECHNIQUE

[001] The present application claims priority over Korean Patent Application Number 10-2023-0099233, filed on July 28, 2023 in the Republic of Korea, the invention of which is incorporated herein by reference.

[002] The present invention relates to a cylindrical battery cell, a battery pack and a vehicle including the same, and a collector plate and, more specifically, relates to a cylindrical battery cell capable of reducing the internal pressure of the cylindrical battery cell, a battery pack and a vehicle including the same, and a collector plate. BACKGROUND OF THE TECHNIQUE

[003] Secondary batteries, which are easy to apply depending on the product group and have electrical characteristics such as high energy density and the like, are generally used in electric vehicles (EVs) or hybrid electric vehicles (HEVs) that are powered by an electric drive source, as well as in portable devices.

[004] These secondary batteries are attracting attention as a new energy source to improve sustainability and energy efficiency due to the primary advantage of dramatically reducing the use of fossil fuels and another advantage of not generating byproducts resulting from energy use.

[005] Commonly used secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and the like. The operating voltage of this unit secondary battery cell is approximately 2.5 V to 4.5 V. Petition 870250086430, dated 09 / 24 / 2025, page 10 / 57 2 / 30

[006] Therefore, when a higher output voltage than this is required, a battery pack can be configured by connecting a plurality of battery cells in series. Furthermore, a battery module or a battery pack can be configured by connecting multiple battery cells in parallel, depending on the required charge / discharge capacity. Consequently, the number of battery cells included in the battery pack and the type of electrical connection can be defined in various ways, depending on at least one of the output voltage or the charge / discharge capacity.

[007] Meanwhile, as a type of secondary battery cell, cylindrical, prismatic, and pouch-type battery cells are known. In the case of a cylindrical battery cell, a separator, which is an insulator, is interposed between a positive electrode plate and a negative electrode plate, and this is rolled up to form a jelly-roll type electrode assembly, which is then inserted into a battery container along with an electrolyte to form a battery. In addition, a collector plate can be used to electrically connect each of the positive electrode plate and the negative electrode plate in the cylindrical battery cell.

[008] Repeated charge and discharge cycles of the cylindrical battery cell can generate gas within the electrode assembly, thereby increasing the internal pressure and, if this internal pressure is not reduced, an explosion can occur, so a vent portion can be formed in several ways in the cylindrical battery cell.

[009] However, a conventional cylindrical battery cell has a problem in which gas discharge is not easy because the collector plate blocks the space between the central portion and the vent portion of the electrode array. Petition 870250086430, dated 09 / 24 / 2025, page 11 / 57 3 / 30 DETAILED DESCRIPTION OF THE INVENTION TECHNICAL PROBLEM

[0010] The present invention was designed to solve the problems of the related art and, therefore, the present invention is directed to providing a cylindrical battery cell in which the shape of a collector plate is deformed due to the increase in internal pressure when gas is generated inside the cylindrical battery cell, thereby reducing the internal pressure and preventing an explosion, a battery pack and a vehicle, which include the same, and a collector plate.

[0011] However, the technical problems that the present invention seeks to solve are not limited to the problems mentioned above, and other problems not mentioned above will be clearly understood by those skilled in the art of the invention described below. TECHNICAL SOLUTION

[0012] According to one aspect of the present invention, a cylindrical battery cell is provided comprising: an electrode assembly configured in a structure in which a positive electrode plate, a negative electrode plate and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction; a cylindrical battery container configured to house the electrode assembly and having a through hole formed therein; a positive electrode collector plate electrically connected to the positive electrode plate; a cell terminal connected to the positive electrode collector plate through the through hole of the battery container;and a negative electrode collector plate electrically connected to the negative electrode plate, wherein a breakdown induction portion is formed on the positive electrode collector plate or on the negative electrode collector plate such that at least a portion of the positive electrode collector plate or the collector plate; Petition 870250086430, dated 09 / 24 / 2025, page 12 / 57 4 / 30 of the negative electrode is ruptured by the gas generated inside the battery casing.

[0013] In one embodiment, the positive electrode collector plate or the negative electrode collector plate may include: an edge portion that defines an edge; a central portion spaced from the edge portion and coupled to the electrode assembly; and a connection portion configured to connect the edge portion and the central portion.

[0014] In one embodiment, the rupture-inducing portion may be formed in the connecting portion.

[0015] In one embodiment, the rupture-inducing portion may be formed in the connecting portion at a position where the central portion and the connecting portion meet.

[0016] In one embodiment, the fracture induction portion may be formed as a notched groove.

[0017] In one embodiment, the rupture induction portion can be formed as a through hole.

[0018] In one embodiment, four connecting portions may be provided, and eight notched grooves may be provided such that a pair of notched grooves is formed in each connecting portion.

[0019] In one embodiment, the notched groove may be formed to be recessed towards the interior of the connecting portion in a direction in which a width or thickness of the connecting portion is gradually or continuously reduced.

[0020] In one embodiment, the rupture induction portion can be configured to include a twisted portion formed by twisting the connecting portion.

[0021] In one embodiment, the twisted portion may include: a first portion connected to the central portion; and a second portion configured to be twisted and folded from the first portion and then li Petition 870250086430, dated 09 / 24 / 2025, page 13 / 57 5 / 30 added to the edge portion.

[0022] In one embodiment, the twisted portion can be formed into a curved shape so as to rotate the gas.

[0023] In one embodiment, the twisted portion can be configured so that the connecting portion is rotated 180 degrees from the center portion and coupled to the edge portion.

[0024] Meanwhile, according to another aspect of the present invention, a battery pack can be provided that includes at least one cylindrical battery cell described above, and a vehicle can be provided that includes at least one cylindrical battery cell described above.

[0025] Meanwhile, according to another aspect of the present invention, a collector plate can be provided that electrically connects an electrode assembly located in a portion where a vent portion is formed in a cylindrical battery cell, the collector plate including: an edge portion defining an edge; a central portion spaced from the edge portion and coupled to the electrode assembly; and a connection portion configured to connect the edge portion and the central portion, wherein a rupture induction portion is formed in the collector plate such that at least a portion of the collector plate is ruptured by the gas generated within the cylindrical battery cell. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0026] The embodiments of the present invention have the effect of reducing the internal pressure by deforming the shape of the collector plate when gas is generated inside the cylindrical battery cell to increase the internal pressure.

[0027] In addition, there is the effect of preventing an explosion of the cylindrical battery cell.

[0028] However, the effects obtained with the present invention do not Petition 870250086430, dated 09 / 24 / 2025, page 14 / 57 6 / 30 are limited to the effects mentioned above, and other effects not mentioned above will be clearly understood by those skilled in the art of the invention described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings illustrate a preferred embodiment of the present invention and, together with the detailed description of the invention, serve to provide a better understanding of the technical idea of ​​the present invention and, thus, the present invention is not interpreted as being limited to the drawings.

[0030] Figure 1 is a perspective view of a cylindrical battery cell, according to an embodiment of the present invention.

[0031] Figure 2 is a cross-sectional view of a cylindrical battery cell, according to an embodiment of the present invention.

[0032] Figure 3 is a diagram illustrating a battery container in a cylindrical battery cell, according to one embodiment of the present invention.

[0033] Figure 4 is a perspective view of a negative electrode collector plate of a cylindrical battery cell, according to an embodiment of the present invention.

[0034] Figures 5 to 10 are perspective views of negative electrode collector plates, according to modifications of the embodiment of Figure 4, respectively.

[0035] Figure 11 is a perspective view illustrating the negative electrode collector plate of Figure 10, whose shape has been altered.

[0036] Figure 12 is a diagram that schematically illustrates the configuration of a battery pack, which includes a cylindrical battery cell, according to each embodiment of the present invention.

[0037] Figure 13 is a diagram illustrating a vehicle, which includes a set of batteries, according to each embodiment of the present Petition 870250086430, dated 09 / 24 / 2025, page 15 / 57 7 / 30 invention. BEST WAY TO IMPLEMENT THE INVENTION

[0038] Hereafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the terms used in the specification and appended claims are not to be interpreted as limited to general and dictionary meanings, but interpreted based on the meanings and concepts that correspond to the technical aspects of the present invention, based on the principle that the inventor is permitted to define the terms appropriately for the best explanation. Therefore, the configurations proposed in the embodiments and drawings of this specification indicate only the most preferred embodiment of the present invention and do not represent all the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications could be made to this invention at the time of filing the application.

[0039] The sizes of the respective elements or specific parts of each element shown in the accompanying drawings are exaggerated, omitted, or simplified for the sake of explanation and clarification. Consequently, the sizes of the respective elements do not entirely reflect their actual sizes. Descriptions of known functions or configurations that may obscure the subject matter of the present invention will be omitted.

[0040] The expression one element is 'coupled' or 'fixed' to another element should be understood to mean that elements can be directly coupled or fixed to each other, and that elements can be indirectly coupled or fixed to each other through another element.

[0041] Figure 1 is a perspective view of a cell of Petition 870250086430, dated 09 / 24 / 2025, page 16 / 57 8 / 30 cylindrical battery, according to an embodiment of the present invention, Figure 2 is a cross-sectional view of a cylindrical battery cell, according to an embodiment of the present invention, Figure 3 is a diagram illustrating a battery container in a cylindrical battery cell, according to an embodiment of the present invention, and Figure 4 is a perspective view of a negative electrode collector plate of a cylindrical battery cell, according to an embodiment of the present invention.

[0042] Referring to Figures 1 and 2, a cylindrical battery cell 10, according to one embodiment of the present invention, includes an electrode assembly 100, a battery container 200, a positive electrode collector plate 300, a cell terminal 400 and a negative electrode collector plate 600.

[0043] Referring to Figure 2, the electrode assembly 100 has a structure in which a positive electrode plate 110, a negative electrode plate 120, and a separator 130 that is interposed between the positive electrode plate 110 and the negative electrode plate 120 are rolled in one direction. In addition, a central hole 140 can be formed in the center of the electrode assembly 100 to configure a type of jelly-roll.

[0044] For example, the electrode assembly 100 can be manufactured by winding a stack obtained sequentially by stacking the negative electrode plate 120, the separator 130, the positive electrode plate 110 and the separator 130 at least once. Here, the positive electrode plate 110 and the negative electrode plate 120 can be formed into a sheet shape.

[0045] That is, the electrode assembly 100 applied to the present embodiment may be a winding-type electrode assembly 100. In this case, an additional separator may be provided on the outer surface of the electrode assembly 100 for insulation from the container. Petition 870250086430, dated 09 / 24 / 2025, p. 17 / 57 9 / 30 of battery 200. That is, the electrode array 100 can have a winding structure well known in the relevant art, without limitations.

[0046] The positive electrode plate 110 may have a positive electrode active material applied to one or both sides thereof, and a first uncoated portion 111 (see Figure 2) on which the positive electrode active material is not applied may be formed at one end of the positive electrode plate 110. Although Figure 2 illustrates the positive electrode plate 110 on which the first uncoated portion 111 is formed, the cylindrical battery cell 10, according to one embodiment of the present invention, includes an embodiment of a positive electrode plate 110 on which the first uncoated portion 111 is not formed. However, for convenience of explanation, the following description will be made based on the positive electrode plate 110 that has the first uncoated portion 111 formed on it.The first uncoated portion 111 can be exposed to the outside of the separator 130 while forming a plurality of winding turns around the center of the electrode assembly 100 and can be used as an electrode tab in itself.

[0047] The negative electrode plate 120 may have a negative electrode active material applied to one or both sides thereof, and a second uncoated portion 121 (see Figure 2) in which the negative electrode active material is not applied may be formed at one end of the negative electrode plate 120. Although Figure 2 illustrates the negative electrode plate 120 in which the second uncoated portion 121 is formed, the cylindrical battery cell 10, according to one embodiment of the present invention, includes an embodiment of a negative electrode plate 120 in which the second uncoated portion 121 is not formed. However, for convenience of explanation, the following description will be made based on the electrode plate. Petition 870250086430, dated 09 / 24 / 2025, p. 18 / 57 10 / 30 negative 120 which has the second uncoated portion 121 formed over it. The second uncoated portion 121 can be exposed to the outside of the separator 130, while forming a plurality of turns around the center of the electrode assembly 100, and can be used as an electrode tab by itself.

[0048] That is, at least one of the positive electrode plate 110 and the negative electrode plate 120 may include an uncoated portion in which the active material is not coated on the long side end in the winding direction. Furthermore, the first uncoated portion 111 and the second uncoated portion 121 may be configured to be directed in opposite directions to each other.

[0049] Here, any active material known in the art may be used for the active material of the positive electrode coated on the positive electrode plate 110 and the active material of the negative electrode coated on the negative electrode plate 120, without limitation.

[0050] In addition, separator 130 can be configured as a single porous polymer film, for example, a porous polymer film made of a polyolefin polymer, such as an ethylene homopolymer, a propylene homopolymer, an ethylene / butene copolymer, an ethylene / hexene copolymer, an ethylene / methacrylate copolymer, or the like, or as a stack thereof.

[0051] As another example, a conventional porous nonwoven fabric, such as a nonwoven fabric made of high melting point fiberglass, polyethylene terephthalate fiber and the like, can be used for separator 130.

[0052] The separator 130 may include a coating layer of inorganic particles on at least one surface thereof. In addition, the separator 130 itself may be formed by a coating layer of inorganic particles. The particles that constitute Petition 870250086430, dated 09 / 24 / 2025, page 19 / 57 11 / 30 The coating layer may have a structure in which these are combined with a binder, so that there is an interstitial volume between adjacent particles.

[0053] Furthermore, the central hole 140 of the electrode assembly 100 is also used to weld the cell terminal 400 (positive electrode terminal) and the positive electrode collector plate 300. That is, a laser can be irradiated through the central hole 140 of the electrode assembly 100, thereby welding the cell terminal 400 and the positive electrode collector plate 300.

[0054] Referring to Figure 2, the electrode assembly 100 is received inside the battery container 200. Furthermore, referring to Figure 3, a through hole 211 is formed in the battery container 200. For example, the battery container 200 can be cylindrically formed so that the electrode assembly 100 is accommodated inside the battery container 200 and can be electrically connected to the negative electrode plate 120 of the electrode assembly 100. Consequently, the battery container 200 can have the same polarity as the negative electrode plate 120, that is, a negative polarity.

[0055] Here, the diameter of the battery container 200 is formed to be larger than the diameter of the electrode assembly 100. A gap of a predefined size can be formed between the battery container 200 and the positive electrode collector plate 300, and an insulator 500 can be provided in the gap.

[0056] If the size of the electrode array 100 is increased in the state in which the size of the battery container 200 is fixed according to the standard, the total capacity of the battery cell increases, but the gap between the battery container 200 and the electrode array 100 decreases.

[0057] That is, how the gap between the battery container 200 and the electrode assembly 100 is reduced if the size of the electrode assembly is reduced. Petition 870250086430, dated 09 / 24 / 2025, page 20 / 57 12 / 30 electrodes 100 for increased so as to increase the total capacity of the battery cell, the insulator 500 must be provided in the reduced gap between the battery container 200 and the electrode assembly 100 so as to increase the capacity of the battery cell. Thus, for this purpose, it is desirable that the thickness of the insulator 500 be as thin as possible.

[0058] Referring to Figure 3, the battery container 200 may have a closed portion 210 and an opening 220, which are positioned opposite each other.

[0059] For example, in Figure 3, an opening 220 can be formed in the bottom of the battery container 200. The battery container 200 receives the electrode assembly 100 through the opening 220 formed in the bottom, and the electrolyte is also injected through the opening 220 formed in the bottom of the battery container 200.

[0060] That is, the 200 battery container is an approximately cylindrical container with an opening 220 formed at the bottom and can be made of a conductive material, such as metal. The 200 battery container can be made of a conductive metal, such as aluminum, steel, stainless steel or similar, but is not limited to this.

[0061] Furthermore, in Figure 3, a closed portion 210 can be formed in the upper portion of the battery container 200. The closed portion 210 can be partially formed on the opposite side of the opening 220. A through hole 211 is formed in the closed portion 210 and, as shown in Figure 2, a cell terminal 400 is coupled to the through hole 211 and electrically connected to the positive electrode collector plate 300 through the through hole 211. Furthermore, referring to Figure 2, an insulator 500 can be interposed between the battery container 200 on the side of the closed portion 210 and the positive electrode collector plate 300.

[0062] The positive electrode collector plate 300 is electrically Petition 870250086430, dated 09 / 24 / 2025, page 21 / 57 13 / 30 connected to the positive electrode plate 110 and, for example, referring to Figure 2, the positive electrode collector plate 300 is connected to the positive electrode plate 110 in the upper portion of the electrode assembly 100. Here, a rupture induction portion 700 can be formed on the positive electrode collector plate 300. As will be described in detail below, the present invention will be described based on the case where the rupture induction portion 700 is formed on the negative electrode collector plate 600, and the description of the negative electrode collector plate 600 can also be applied to the case where a rupture induction portion 700 is formed on the positive electrode collector plate 300.

[0063] The positive electrode collector plate 300 is made of a conductive metal and is connected to the first uncoated portion 111 of the electrode assembly 100. The positive electrode collector plate 300 can be coupled to the top of a coupling surface formed by bending the end of the first uncoated portion 111 in a direction parallel to the positive electrode collector plate 300. The bending direction of the first uncoated portion 111 can be, for example, a direction towards the central winding portion of the electrode assembly 100.

[0064] If the first uncoated portion 111 has the folded shape described above, the space occupied by the first uncoated portion 111 can be reduced, thereby improving the energy density. In addition, the coupling area between the first uncoated portion 111 and the positive electrode collector plate 300 can be increased, thereby improving the bonding resistance and reducing the resistance.

[0065] The terminal of cell 400 is made of a conductive metal and is connected to the through hole 211 formed in the closed portion 210 of the battery container 200, so as to be electrically connected to Petition 870250086430, dated 09 / 24 / 2025, page 22 / 57 14 / 30 positive electrode collector plate 300 through through hole 211. Furthermore, cell terminal 400 is electrically connected to the positive electrode plate 110 of the electrode assembly 100 through the positive electrode collector plate 300 and thus has a positive polarity.

[0066] That is, cell terminal 400 can function as a positive electrode terminal. Furthermore, battery container 200 can be electrically connected to the negative electrode plate 120 of electrode assembly 100 and thus has a negative polarity, as described above.

[0067] Referring to Figure 2, the negative electrode collector plate 600 is electrically connected to the negative electrode plate 120. Here, a rupture induction portion 700 can be formed on the negative electrode collector plate 600. However, the rupture induction portion 700 will be described later.

[0068] The negative electrode collector plate 600 is connected to the second uncoated portion 121 of the electrode assembly 100. The negative electrode collector plate 600 is coupled to the lower portion of the electrode assembly 100. The negative electrode collector plate 600 may be made of a conductive metal, such as aluminum, steel, copper, nickel or similar, and electrically connected to the second uncoated portion 121 of the negative electrode plate 120.

[0069] The negative electrode collector plate 600 can be electrically connected to the battery container 200. For this purpose, at least a portion of the edge of the negative electrode collector plate 600 can be interposed and fixed between the inner surface of the battery container 200 and the sealing gasket 260.

[0070] As an embodiment, at least a portion of the edge of the negative electrode collector plate 600 may be supported on the lower surface of a crimp portion 240 formed at the end Petition 870250086430, dated 09 / 24 / 2025, page 23 / 57 15 / 30 lower part of battery container 200 and fixed to the crimp portion 240 by welding. In a modified embodiment, at least a portion of the edge of the negative electrode collector plate 600 can be directly welded to the inner wall surface of battery container 200.

[0071] Furthermore, at least a portion of the remaining portion of the negative electrode collector plate 600, excluding the bonding portion of the crimp portion 240, can be coupled to the folded surface of the second uncoated portion 121 by welding, for example, laser welding.

[0072] In addition, at least one portion of the edge of the negative electrode collector plate 600 can be electrically coupled to one of the upper and lower surfaces of the crimping portion 240 adjacent to a crimping portion 250.

[0073] Referring to Figure 2, a cover plate 230 is configured to seal the opening 220 (see Figure 3) formed in the bottom of the battery container 200. The cover plate 230 can be made, for example, of a metal to ensure rigidity.

[0074] Furthermore, the cap plate 230 can be separated from the electrode assembly 100 so that it has no polarity. That is, even if the cap plate 230 is made of a conductive metal, it may not have a polarity.

[0075] The fact that the cover plate 230 has no polarity indicates that the cover plate 230 is electrically isolated from the battery container 200 and the cell terminal 400. As described above, the cover plate 230 may not have a polarity and is not necessarily made of a conductive metal.

[0076] The cover plate 230 can be placed and supported in the crimp portion 240 formed in the battery container 200. Furthermore, the cover plate 230 is secured by the crimp portion 250. A Petition 870250086430, dated 09 / 24 / 2025, page 24 / 57 A 16 / 30 sealing gasket 260 can be interposed between the cover plate 230 and the crimping portion 250 of the battery container 200 to ensure the tightness of the battery container 200. That is, the sealing gasket 260 can be configured to be interposed between the edge of the cover plate 230 and the opening 220 of the battery container 200.

[0077] The crimping portion 240 and the crimping portion 250 can be formed in the lower portion of the battery container 200.

[0078] The 240 frieze portion is formed by pressing the outer circumference of the 200 battery container inward, in an area adjacent to the 220 opening of the 200 battery container.

[0079] The crimping portion 240 can support the electrode assembly 100, which has a size approximately corresponding to the width of the battery container 200, so that the electrode assembly 100 does not come out through the opening 220 formed in the bottom of the battery container 200, and can also function as a support on which the cover plate 230 is seated. In addition, the crimping portion 240 can support the outer surface of the sealing gasket 260.

[0080] The crimping portion 250 is configured to extend and bend into the interior of the battery container 200 and to wrap around and secure the edge of the cover plate 230 together with the sealing gasket 260. Here, the crimping portion 250 is formed at the bottom of the battery container 200, based on the arrangement of the battery container 200. For example, in the case where the battery container 200 is arranged so that the cell terminal 400 is located at the top, as shown in Figure 2, the crimping portion 250 is formed at the bottom of the battery container 200, based on Figure 2. Furthermore, as shown in Figure 2, the crimping portion 250 is formed below the crimping portion 240. However, this is only one embodiment, and the positions of the crimping portion 250 and the crimping portion 240 are not limited to this. Petition 870250086430, dated 09 / 24 / 2025, page 25 / 57 17 / 30

[0081] Furthermore, the present invention does not exclude a case where the battery container 200 does not have at least one of the crimping portion 240 and the crimping portion 250. In the present invention, if the battery container 200 does not have at least one of the crimping portion 240 and the crimping portion 250, the fixing of the electrode assembly 100, the fixing of the cover plate 230 or the sealing of the battery container 200 can be carried out by at least one additional application of a component that can function as a stop for the electrode assembly 100, additional application of a structure in which the cover plate 230 is able to be seated and welding between the battery container 200 and the cover plate 230.

[0082] In Figure 2, the crimping portion 250 is formed below the crimping portion 240. The crimping portion 250 is configured to extend and bend so as to encircle the edge of the cover plate 230 disposed below the crimping portion 240. The cover plate 230 is secured onto the crimping portion 240 by the bent shape of the crimping portion 250.

[0083] Meanwhile, the battery container 200 of the present invention may not have at least one of the crimping portion 240 and the crimping portion 250 and, in this case, the sealing gasket 260 may be interposed between a fastening structure provided on the opening side 220 in the battery container 200 and the cover plate 230 to ensure the tightness of the battery container 200.

[0084] For example, it is also possible to exclude the crimping portion 250 and have the cover plate 230 cover the opening 220 of the battery container 200 and be secured using another fastening structure. For example, Korean Unexamined Patent Publication KR 10-2019-0030016A, filed by the applicant, describes a cylindrical battery cell that excludes the crimping portion 240, and such a structure can be applied to the present invention. Petition 870250086430, dated 09 / 24 / 2025, p. 26 / 57 18 / 30

[0085] A vent notch 231 may be formed in the cover plate 230 so as to rupture when the pressure inside the battery container 200 exceeds a limit.

[0086] For example, the ventilation notch 231 can be formed on both sides of the cover plate 230 and can be formed in at least one pattern among a continuous circular pattern, a discontinuous circular pattern, and a linear pattern on the surface of the cover plate 230. Furthermore, the ventilation notch 231 can be formed in several other patterns.

[0087] Vent notch 231 can be formed in the bottom of battery container 200, based on the arrangement of battery container 200 in Figure 2, and can be configured so that gas is discharged from battery container 200 through the bottom of battery container 200 when vent notch 231 ruptures. For example, in the case where cell terminal 400 is positioned on top of battery container 200, as shown in Figure 2, vent notch 231 can be formed in the bottom of battery container 200.

[0088] The ventilation notch 231 can be shaped to be thinner than the surrounding area of ​​the cover plate 230.

[0089] Because the vent notch 231 is thinner than the surrounding area, it can be ruptured more easily than the surrounding area, and when the internal pressure of the battery container 200 increases to a certain level or more, the vent notch 231 can rupture to discharge the gas generated inside the battery container 200.

[0090] For example, the ventilation notch 231 may be formed by notches on one side or both sides of the cover plate 230, by means of partially reducing the thickness of the battery container 200. Petition 870250086430, dated 09 / 24 / 2025, p. 27 / 57 19 / 30

[0091] The cylindrical battery cell 10, according to one embodiment of the present invention, may have a structure in which both the positive electrode terminal and the negative electrode terminal are positioned in the upper portion of Figure 2, and thus the upper structure is more complex than the lower structure.

[0092] Therefore, in order to smoothly discharge the gas generated inside the battery container 200, the vent notch 231 can be formed in the cover plate 230 which constitutes the lower surface of the cylindrical battery cell 10.

[0093] As described above, if the gas generated inside the battery container 200, provided in the cylindrical battery cell 10, is discharged downwards, this can be advantageous for user safety.

[0094] For example, in the case where the cylindrical battery cell 10 is disposed directly under the driver's seat in an electric vehicle, if the gas is discharged upwards, there may be a safety hazard for the driver. However, if the gas is discharged downwards from the battery container 200, as in the cylindrical battery cell 10, according to one embodiment of the present invention, the above problem does not occur even if the cylindrical battery cell 10 is disposed directly under the driver's seat in an electric vehicle.

[0095] Hereafter, the rupture induction portion 700 will be described. The rupture induction portion 700 can be formed on the collector plate arranged in a direction in which the gas is discharged. That is, the rupture induction portion 700 can be formed on the collector plate that electrically connects the electrode assembly 100 located in the area where the vent portion is formed on the cylindrical battery cell 10.

[0096] In the present embodiment, the ventilation portion may be the ventilation notch 231 formed in the cover plate 230 and, in this case Petition 870250086430, dated 09 / 24 / 2025, page 28 / 57 20 / 30 so, the rupture induction portion 700 can be formed on the negative electrode collector plate 600 located in the area where the vent notch 231 is formed.

[0097] For example, as described above, as the gas generated within the battery container 200 provided in the cylindrical battery cell 10 is discharged downwards in Figure 2, the rupture induction portion 700 is formed on the negative electrode collector plate 600 located at the bottom. Furthermore, although not shown in the drawing, for example, in the case where the gas is discharged through the upper portion of the cylindrical battery cell 10 and where the positive electrode collector plate 300 is located at the top, the rupture induction portion 700 may be formed on the positive electrode collector plate 300.

[0098] That is, depending on the direction of gas discharge, the rupture induction portion 700 can be formed on the positive electrode collector plate 300 or on the negative electrode collector plate 600. However, in the embodiment shown in Figure 2, since the rupture induction portion 700 is formed on the negative electrode collector plate 600, the following description will be based on the case where the rupture induction portion 700 is formed on the negative electrode collector plate 600 for convenience of explanation. Furthermore, the description of the embodiment where the rupture induction portion 700 is formed on the negative electrode collector plate 600 can also be applied to the embodiment where the rupture induction portion 700 is formed on the positive electrode collector plate 300.

[0099] As shown in Figure 2, the rupture induction portion 700 is formed on the negative electrode collector plate 600 and configured so that at least a portion of the negative electrode collector plate 600 is ruptured by the gas generated within the battery container 200. Petition 870250086430, dated 09 / 24 / 2025, page 29 / 57 21 / 30

[00100] Referring to Figure 2, as the negative electrode collector plate 600 is positioned between the central hole 140 of the electrode assembly 100 and the cover plate 230, when the gas generated inside the battery container 200 moves towards the cover plate 230 through the central hole 140, the movement is prevented by the negative electrode collector plate 600.

[00101] That is, if the negative electrode collector plate 600 remains in its original position, the gas generated inside the battery container 200 will not be easily discharged due to the interference of the negative electrode collector plate 600, thereby increasing the internal pressure of the battery container 200. However, if the internal pressure of the battery container 200 is left unattended, without being reduced, an explosion may occur in the cylindrical battery cell 10.

[00102] Therefore, in order to solve this problem, the cylindrical battery cell 10, according to one embodiment of the present invention, is configured so that the rupture induction portion 700 is formed on the negative electrode collector plate 600, so that the negative electrode collector plate 600 is ruptured by the internal pressure of the battery container 200.

[00103] Referring to Figure 4, the negative electrode collector plate 600 can be configured to include an edge portion 610, a central portion 620, and a connection portion 630. Figure 4 shows the negative electrode collector plate 600 viewed from the opposite direction in Figure 2. That is, although the central portion 620 is located above the edge portion 610 in Figure 2, the central portion 620 is located below the edge portion 610 in Figure 4. This is also the same in Figures 5 to 11 below.

[00104] Border portion 610 defines a border and may have an approximate border shape, in which at least a portion of the region Petition 870250086430, dated 09 / 24 / 2025, page 30 / 57 The inner 22 / 30 is empty to form an internal space. Although the edge portion 610 is shown as having an approximately circular edge shape in Figure 4, the shape of the edge portion 610 is not limited to this. Contrary to what is shown, the edge portion 610 may have an approximately square edge shape, a hexagonal edge shape, an octagonal edge shape, or other shapes. The edge portion 610 may be coupled to the connecting portion 630.

[00105] The central portion 620 is located within the edge portion 610 and is spaced from the edge portion 610. For example, the central portion 620 can be positioned in the exact center of the internal space of the edge portion 610, but is not limited to this. Furthermore, the central portion 620 is coupled to the connecting portion 630 and is connected to the edge portion 610 by the connecting portion 630. Additionally, the central portion 620 is coupled to the electrode assembly 100. Here, the central portion 620 can be arranged in a position that corresponds to the central hole 140 of the electrode assembly 100.

[00106] The connecting portion 630 connects the edge portion 610 and the center portion 620. A plurality of connecting portions 630 can be provided, and the plurality of connecting portions 630 can be spaced from each other. Although four connecting portions 630 are provided in Figure 4, the number of connecting portions 630 is not limited to this. Furthermore, the plurality of connecting portions 630 can be arranged at equal intervals, but is not limited to this.

[00107] Here, the rupture induction portion 700 can be formed in various positions and formed, for example, in the connection portion 630. As an embodiment, as shown in Figure 4, the rupture induction portion 700 can be formed in the connection portion 630 in the position where the central portion 620 and the connection portion 630 meet. However, the rupture induction portion 700 does not precisely Petition 870250086430, dated 09 / 24 / 2025, page 31 / 57 23 / 30 can only be formed at the position where the central portion 620 and the connecting portion 630 meet, and can be formed at any position of the connecting portion 630.

[00108] Referring to Figure 4, the rupture induction portion 700 can be formed as a groove, for example, a notched groove 710, in which the width of the connecting portion 630 is reduced at the position where the central portion 620 and the connecting portion 630 meet. Furthermore, the notched groove 710 can be formed to be recessed towards the interior of the connecting portion 630 in a direction in which the width of the connecting portion 630 is gradually or continuously reduced (in the left-right direction of the connecting portion 630). That is, the notched groove 710 can be formed in the width direction of the outer end of the connecting portion 630 towards its interior. Here, the outer end of the connecting portion 630 is on the side of the edge portion 610, and the inner end of the connecting portion 630 is on the side of the center portion 620.

[00109] The notched groove 710 can have various shapes. Although it is formed in a triangular shape in Figure 4, it is not limited to this and can have more diverse shapes.

[00110] Furthermore, as shown in Figure 4, a pair of rupture induction portions 700 can be provided to be disposed at both ends of the connecting portion 630, respectively. For example, four connecting portions 630 can be provided, and eight notched grooves 710 can be formed so that a pair of notched grooves is provided in each connecting portion 630, but the invention is not limited to this.

[00111] As described above, if the rupture induction portion 700, such as the notched groove 710, is formed in the connection portion 630, when the internal pressure of the battery container is 200 au Petition 870250086430, dated 09 / 24 / 2025, page 32 / 57 24 / 30 mint, the connecting portion 630 can break off at the notched groove 710, so that the central portion 620 coupled to the electrode assembly 100 can also be easily removed.

[00112] Furthermore, if the central portion 620 is removed and the central hole 140 of the electrode assembly 100 is opened, the gas inside the battery container 200 moves towards the cover plate 230 through the central hole 140 and breaks the vent notch 231 formed in the cover plate 230. Therefore, the gas inside the battery container 200 can be easily discharged from the battery container 200.

[00113] Furthermore, the internal pressure of the cylindrical battery cell 10 can be reduced by discharging the gas inside the battery container 200, thereby preventing the explosion of the cylindrical battery cell 10.

[00114] Figures 5 to 10 are perspective views of negative electrode collector plates according to modifications of the embodiment of Figure 4, respectively, and Figure 11 is a perspective view illustrating the negative electrode collector plate of Figure 10, whose shape has been altered.

[00115] The modality description in Figure 4 can also be applied to the modified modalities in Figures 5 to 11 with respect to redundant components. Furthermore, the modality description in Figure 4, which is applicable to the modified modalities in Figures 5 to 11, can be applied to the modified modalities in Figures 5 to 11.

[00116] Referring to Figure 5, as in the embodiment in Figure 4, the rupture induction portion 700 can be formed as a groove, for example, a notched groove 710. However, the groove is formed so that the width (in the left-to-right direction) of the connecting portion 630 is reduced in Figure 4, whereas the groove is formed so that the thickness (in the top-to-bottom direction) of the Petition 870250086430, dated 09 / 24 / 2025, page 33 / 57 25 / 30 connecting portion 630 is reduced in Figure 5. That is, the notched groove 710 can be formed to be recessed towards the interior of the connecting portion 630 in a direction in which the thickness of the connecting portion 630 is gradually or continuously reduced.

[00117] Referring to Figure 5, the notched groove 710 can be formed on the upper and lower surfaces of the connecting portion 630, respectively, at the position where the central portion 620 and the connecting portion 630 meet. As described above, even if the notched groove 710 is formed in such a way that the thickness of the connecting portion 630 is reduced, the connecting portion 630 can rupture at the notched groove 710 due to the internal pressure of the battery container 200.

[00118] Referring to Figure 6, the rupture induction portion 700 can be formed as a through hole 720. Here, the through hole 720 can be formed in any portion of the connection portion 630. For example, the through hole 720 can be formed in the middle of the connection portion 630, or it can be formed in the connection portion 630 at the position where the central portion 620 and the connection portion 630 meet.

[00119] Various numbers of through holes 720 can be provided. For example, although a through hole 720 is formed in a connection portion 630 in Figure 6, this is only one embodiment, and the number of through holes 720 formed in a connection portion 630 can vary.

[00120] Furthermore, the through hole 720 can have various shapes. For example, although the circular through hole 720 is formed in the connecting portion 630 in Figure 6, this is only one embodiment, and the shape of the through hole 720 can vary, such as an oval, triangle or square. Petition 870250086430, dated 09 / 24 / 2025, page 34 / 57 26 / 30

[00121] As described above, if the through hole 720 is formed in the connection portion 630, the connection portion 630 can easily rupture due to the internal pressure of the battery container 200.

[00122] Furthermore, referring to Figure 7, the rupture induction portion 700 is configured in such a way that a notched groove 710 is additionally formed in the circular through hole 720. That is, a pair of triangular notched grooves 710 is formed from the circumference of the circular through hole 720 towards the outside. Here, the pair of notched grooves 710 can be formed to face in opposite directions. Here, the shapes of the through hole 720 and the notched groove 710 can vary.

[00123] Referring to Figure 8, the rupture induction portion 700 can be configured to include a twisted portion 730 formed by twisting the connection portion 630. The twisted portion 730 can be formed by cutting the portion of the connection portion 630 that is connected to the edge portion 610, twisting it so that the opposite surface (bottom surface) is directed upwards, and welding it to the edge portion 610.

[00124] Furthermore, when twisting the connecting portion 630 and connecting it to the edge portion 610, the degree of welding can be adjusted to induce fracture so that the edge portion 610 and the connecting portion 630 easily break apart. Here, a cut or groove (e.g., a notched groove) can be formed at the position where the edge portion 610 and the twisted portion 730 meet, facilitating the fracture of the edge portion 610 and the connecting portion 630.

[00125] For example, the twisted portion 730 can be configured to include a first portion 731 and a second portion 732. The first portion 731 is connected to the center portion 620. Furthermore, the second portion 732 is twisted and bent from the first portion 731 and then connected to the edge portion 610. Petition 870250086430, dated 09 / 24 / 2025, page 35 / 57 27 / 30

[00126] As described above, if the twisted portion 730 is formed in the connecting portion 630, the gas inside the battery container moves and collides with the twisted portion 730 to rotate. The gas moves and rotates, the energy consumption increases and the force is uniformly distributed in all directions, thereby reducing the explosive power caused by the gas.

[00127] Furthermore, when welding the connection portion 630, in which the twisted portion 730 is formed to the edge portion 610, the degree of welding can be adjusted, or a cut or groove (e.g., a notched groove) can be formed to facilitate the fracture of the edge portion 610 and the connection portion 630 by the gas.

[00128] That is, the embodiment in Figure 8 has the effects of facilitating the fracture of the edge portion 610 and the connection portion 630 provided on the negative electrode collector plate 600 to facilitate gas discharge, avoiding an explosion due to internal pressure according to this and consuming the energy possessed by the gas by rotating the gas through the twisted portion 730 to uniformly distribute the force, thereby reducing the explosive power caused by the gas.

[00129] Figure 9 shows a modification of the embodiment of Figure 8, in which the twisted portion 730 is formed into a curved shape so as to rotate the gas. The twisted portion 730 can have various curved shapes and, for example, referring to Figure 9, the twisted portion 730 can be configured so that the connecting portion 630 rotates 180 degrees from the central portion 620 and is coupled to the edge portion 610.

[00130] Furthermore, as shown in Figure 9, a notched groove 710 can be formed in the second portion 732 of the twisted portion 730.

[00131] The arrangement in Figure 9 is more advantageous for gas rotation compared to the arrangement in Figure 8. However, either the arrangement in Figure 8 or the arrangement in Figure 9 may be appropriate. Petition 870250086430, dated 09 / 24 / 2025, page 36 / 57 28 / 30 carefully selected, as needed.

[00132] Meanwhile, the detailed description of the modality in Figure 8 can be applied to the modality in Figure 9.

[00133] Referring to Figure 10, the rupture induction portion 700 is formed as a groove, for example, a notched groove 710. Furthermore, this is formed as a groove in which the thickness (in the top-down direction) of the connecting portion 630 is reduced. However, although a pair of notched grooves 710 are formed on both the upper and lower surfaces of the connecting portion 630 in Figure 5, the embodiment in Figure 10 is different, in that the notched groove 710 is formed only on the upper surface of the connecting portion 630.

[00134] In the case where the notched groove 710 is formed only on the upper surface of the connecting portion 630, as shown in Figure 10, the negative electrode collector plate 600 moves in the opposite direction (see arrow in Figure 11) due to the gas inside the battery container 200, as shown in Figure 11. When the central portion 620 is deformed in the opposite direction, as described above, the gas inside the battery container 200 is easily discharged. Here, if gas continues to be generated after the central portion 620 is deformed in the opposite direction, the central portion 620 and the connecting portion 630 may eventually rupture. In the embodiment of Figure 5, the central portion 620 of the negative electrode collector plate 600 may also be deformed in the opposite direction due to the gas inside the battery container 200, as shown in Figure 10.

[00135] Figure 12 is a diagram that schematically illustrates the configuration of a battery pack that includes a cylindrical battery cell, according to each embodiment of the present invention.

[00136] Referring to Figure 12, a battery pack 20, according to one embodiment of the present invention, may include a Petition 870250086430, dated 09 / 24 / 2025, page 37 / 57 29 / 30 or more cylindrical battery cells 10, according to an embodiment of the present invention described above. In addition, the battery pack 20 may also include a housing 200 for storing the cylindrical battery cell 10 and various devices for controlling the charging and discharging of the cylindrical battery cell 10, such as a BMS, a current sensor, a fuse or the like.

[00137] Figure 13 is a diagram illustrating a vehicle that includes a battery pack, according to each embodiment of the present invention.

[00138] Referring to Figure 13, a vehicle 30, according to one embodiment of the present invention, may include one or more cylindrical battery cells 10 or battery packs 20, according to each of the embodiments described above. Here, the vehicle 30 includes various vehicles that are designed to use electricity, such as an electric vehicle or a hybrid vehicle.

[00139] Although terms indicating directions such as up, down, left and right are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[00140] As described above, although the present invention has been described with reference to limited embodiments and designs, the present invention is not limited thereto, and various modifications and variations are possible within the technical idea of ​​the present invention and the scope of equivalence of the claims to be described below by those skilled in the art to which the present invention pertains. Therefore, the embodiments described above should be considered as those intended to describe the present invention, to Petition 870250086430, dated 09 / 24 / 2025, p. 38 / 57 30 / 30 instead of those intended to limit the present invention. In other words, the true scope of the technical idea of ​​the present invention is shown in the claims, and all differences within the scope equivalent to these should be interpreted as being included in the present invention. INDUSTRIAL APPLICABILITY

[00141] The present invention relates to a cylindrical battery cell, a battery pack and vehicle including the same, and a collector plate, and is specifically applicable to industries relating to secondary batteries. Petition 870250086430, dated 09 / 24 / 2025, p. 39 / 57

Claims

1 / 3 CLAIMS 1. A cylindrical battery cell characterized in that it comprises: an electrode assembly configured in a structure in which a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction; a cylindrical battery container configured to house the electrode assembly and having a through hole formed therein; a positive electrode collector plate electrically connected to the positive electrode plate; a cell terminal connected to the positive electrode collector plate through the through hole in the battery container;and a negative electrode collector plate electrically connected to the negative electrode plate, wherein a rupture induction portion is formed on the positive electrode collector plate or on the negative electrode collector plate such that at least a portion of the positive electrode collector plate or the negative electrode collector plate is ruptured by the gas generated within the battery container.

2. A cylindrical battery cell according to claim 1, characterized in that the positive electrode collector plate or the negative electrode collector plate comprises: an edge portion defining an edge; a central portion spaced from the edge portion and coupled to the electrode assembly; and a connecting portion configured to connect the edge portion and the central portion.

3. Cylindrical battery cell according to claim 2, characterized in that the rupture induction portion is formed in the connection portion.

4. Cylindrical battery cell according to claim 2, characterized in that the rupture induction portion is formed in the connecting portion at a position where the central portion and the connecting portion meet.

5. Cylindrical battery cell according to claim 1, characterized in that the rupture induction portion is formed as a notched groove.

6. Cylindrical battery cell according to claim 1, characterized in that the rupture induction portion is formed as a through hole.

7. Cylindrical battery cell according to claim 5, characterized in that four connecting portions are provided, and in that eight notched grooves are provided such that a pair of notched grooves is formed in each connecting portion.

8. Cylindrical battery cell according to claim 5, characterized in that the notched groove is formed to be recessed towards an interior of the connecting portion in a direction in which a width or thickness of the connecting portion is gradually or continuously reduced.

9. Cylindrical battery cell according to claim 2, characterized in that the rupture induction portion is configured to include a twisted portion formed by twisting the connecting portion.

10. Cylindrical battery cell according to claim 9, characterized in that the twisted portion comprises: a first portion connected to the central portion; and Petition 870250086430, dated 09 / 24 / 2025, page 41 / 57 3 / 3 a second portion configured to be twisted and bent from the first portion and then connected to the edge portion.

11. Cylindrical battery cell according to claim 9, characterized in that the twisted portion is formed in a curved shape so as to rotate the gas.

12. Cylindrical battery cell according to claim 11, characterized in that the twisted portion is configured so that the connecting portion is rotated 180 degrees from the central portion and coupled to the edge portion.

13. Battery pack characterized in that it comprises at least one cylindrical battery cell as defined in any one of claims 1 to 12.

14. Vehicle characterized in that it comprises at least one cylindrical battery cell as defined in any one of claims 1 to 12.

15. Collector plate that electrically connects an electrode array located in a portion where a vent portion is formed in a cylindrical battery cell, the collector plate characterized in that it comprises: an edge portion that defines an edge; a central portion spaced from the edge portion and coupled to the electrode array; and a connection portion configured to connect the edge portion and the central portion, wherein a rupture induction portion is formed in the collector plate such that at least one portion of the collector plate is ruptured by the gas generated within the cylindrical battery cell. Petition 870250086430, dated 09 / 24 / 2025, pp. 42 / 57

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