Battery, and battery pack and vehicle comprising same

Abstract

A battery according to an embodiment of the present invention may comprise: an electrode assembly having a wound structure around the winding center hole thereof; a battery housing configured to accommodate the electrode assembly through an opening provided at one side thereof; a battery cover configured to cover the opening of the battery housing and provided with a venting part which is configured to be broken when the internal pressure of the battery housing exceeds a reference venting pressure; and a core support inserted into the winding center hole of the electrode assembly to increase the rigidity of the core part of the electrode assembly, and configured to guide the discharge direction of gas generated inside the electrode assembly toward the venting part.

Description

Batteries, battery packs and vehicles containing the same

[0001] The present invention relates to a battery, a battery pack including the same, and a vehicle.

[0002] This application claims priority to Korean Patent Application No. 10-2023-0193194, filed on December 27, 2023, and Korean Patent Application No. 10-2024-0042769, filed on March 28, 2024, the entire contents of which are incorporated herein by reference.

[0003] Batteries with high applicability according to product group and electrical characteristics such as high energy density are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electrical power sources.

[0004] These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can drastically reduce the use of fossil fuels, but also because they produce no byproducts from energy use.

[0005] Currently, widely used battery types include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these unit battery cells ranges from approximately 2.5 V to 4.5 V. Therefore, if a higher output voltage is required, multiple batteries are connected in series to form a battery pack. Furthermore, depending on the required charge / discharge capacity, multiple batteries are connected in parallel to form a battery pack. Therefore, the number of batteries and the electrical connection configuration included in a battery pack can vary depending on the required output voltage and / or charge / discharge capacity.

[0006] Meanwhile, in the case of a cylindrical battery, a jelly roll type electrode assembly having a structure in which a negative electrode (anode), a separator, an anode (cathode), and a separator are sequentially laminated and wound may be accommodated in a roughly cylindrical battery housing.

[0007] The jellyroll-type electrode assembly applied to such cylindrical batteries may have a winding center hole formed in the core portion as the battery is wound. As the battery is repeatedly charged and discharged, the electrodes constituting the electrode assembly may undergo repeated expansion and contraction.

[0008] In cases where expansion and contraction of the electrode are repeated in this way, a core collapse phenomenon may occur, in which the electrode is partially bent on the inner wall of the winding center hole of the electrode assembly and protrudes toward the winding center hole. If this core collapse phenomenon occurs, the risk of a short circuit occurring in the core portion of the electrode assembly increases, making it difficult to ensure the safety of use of the secondary battery.

[0009] Accordingly, there is a need to develop a method to suppress deformation of the core structure of the electrode assembly due to expansion and contraction of the electrode that occurs with repeated charging and discharging of the battery.

[0010] The present invention was created in consideration of the above-described problems, and its primary purpose is to provide an electrode assembly having a structure capable of suppressing deformation of the core structure of the electrode assembly due to expansion and contraction of the electrode that occurs due to repeated charging and discharging of the battery.

[0011] In another aspect, the present invention aims to smoothly discharge pressure in a desired direction when the internal pressure increases during the use of a battery.

[0012] In another aspect, the present invention aims to minimize the pressure transfer to the side of the battery by facilitating pressure release in a desired direction, thereby preventing a chain reaction of fire / explosion due to side rupture.

[0013] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0014] According to one embodiment of the present invention for solving the above-described problem, a battery may include: an electrode assembly having a structure wound around a winding center hole; a battery housing configured to receive the electrode assembly through an opening provided on one side; a battery cover configured to cover the opening of the battery housing and having a venting portion configured to be ruptured when an internal pressure of the battery housing exceeds a reference venting pressure; and a core support inserted into the winding center hole of the electrode assembly to increase the rigidity of a core portion of the electrode assembly, and configured to guide a discharge direction of a gas generated inside the electrode assembly toward the venting portion.

[0015] The above core support may have a hollow structure.

[0016] The above core support may be configured to have electrical insulation properties.

[0017] The core support may have a rupture portion configured to rupture when at least one of the conditions is satisfied: when the pressure caused by the gas generated inside the electrode assembly exceeds a reference rupture pressure; and when the temperature inside the battery housing exceeds a reference rupture temperature.

[0018] The above-mentioned break portion may be provided at a position closer to the second end located opposite the first end than to the first end located in the direction toward the battery cover among the longitudinal ends of the core support body.

[0019] The core support may have a structure in which a first end positioned in the direction toward the battery cover among the longitudinal ends thereof is open, and a second end positioned opposite the first end is closed.

[0020] The above-mentioned breaking portion is provided in multiple numbers, and the plurality of breaking portions may be provided spaced apart from each other along the circumference of the core support.

[0021] The above battery housing may have a beading portion having a structure that is recessed inward from the outer circumference.

[0022] A reinforcing member may be filled within the space surrounded by the above beading portion.

[0023] The battery may include a current collector electrically coupled to the electrode assembly and interposed between the battery cover and the electrode assembly.

[0024] The above-mentioned collector may have a collector hole formed at a position corresponding to the winding center hole.

[0025] The diameter of the above-mentioned collector hole can be formed to be larger than the diameter of the above-mentioned winding center hole.

[0026] The diameter of the above-mentioned collector hole can be formed to be larger than the inner diameter of the core support.

[0027] A battery pack according to one embodiment of the present invention for solving the above-described problem may include a battery according to one embodiment of the present invention.

[0028] A vehicle according to one embodiment of the present invention for solving the above-described problem may include a battery pack according to one embodiment of the present invention.

[0029] According to one aspect of the present invention, deformation of the core structure of an electrode assembly due to expansion and contraction of the electrode caused by repeated charging and discharging of the battery can be suppressed.

[0030] According to another aspect of the present invention, when the internal pressure increases during the use of the battery, the pressure can be smoothly discharged in a desired direction.

[0031] According to another aspect of the present invention, the pressure transfer to the side of the battery can be minimized by ensuring smooth pressure release in the intended direction, thereby preventing a chain reaction of fire / explosion of batteries due to side rupture.

[0032] However, the advantageous effects derived from the present invention are not limited to the above-described effects, and other advantageous effects not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0033] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0034] FIG. 1 is a drawing showing the structure of an upper portion of a battery according to one embodiment of the present invention.

[0035] FIG. 2 is a drawing showing a cross-section of an electrode assembly according to one embodiment of the present invention.

[0036] FIG. 3 is a drawing for explaining a core collapse phenomenon that occurs in a core region of an electrode assembly to which the core support of the present invention is not applied.

[0037] Figures 4 to 7 are drawings showing various embodiments of the core support of the present invention.

[0038] FIG. 8 is a drawing showing a structure to which a reinforcing member is applied in a battery according to one embodiment of the present invention.

[0039] FIG. 9 is a drawing for comparing the inner diameter of a core support, the diameter of a winding center hole, and the diameter of a current collector hole in a battery according to one embodiment of the present invention.

[0040] FIG. 10 is a drawing showing the structure of a lower portion of a battery according to one embodiment of the present invention.

[0041] FIG. 11 is a drawing showing a battery pack according to one embodiment of the present invention.

[0042] FIG. 12 is a drawing showing a vehicle according to one embodiment of the present invention.

[0043] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be interpreted as limited to their typical or dictionary meanings, and should be interpreted with meanings and concepts that conform to the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

[0044]

[0045] Hereinafter, the overall structure of a battery (1) according to one embodiment of the present invention will be described with reference to FIGS. 1 to 7.

[0046] FIG. 1 is a drawing showing the structure of the upper portion of a battery according to one embodiment of the present invention, and FIG. 2 is a drawing showing a cross-section of an electrode assembly according to one embodiment of the present invention. FIG. 3 is a drawing for explaining a core collapse phenomenon occurring in a core region of an electrode assembly to which the core support of the present invention is not applied, and FIGS. 4 to 7 are drawings showing various embodiments of the core support of the present invention.

[0047] Referring to FIG. 1, a battery (1) according to one embodiment of the present invention may include an electrode assembly (10), a battery housing (20), a battery cover (30), and a core support (40). The battery (1) may be a secondary battery. The battery (1) may be a cylindrical battery.

[0048] Referring to FIGS. 1 and 2, the electrode assembly (10) may have a structure wound around a winding center hole (10a) formed in the core. The electrode assembly (10) may include a first electrode (11), a second electrode (12), and a first separator (13) interposed between the first electrode (11) and the second electrode (12). The electrode assembly (10) may be manufactured by sequentially stacking the first electrode (11), the first separator (13), and the second electrode (12) and winding the resulting laminate. The electrode assembly (10) may further include a second separator (14). In this case, the second separator (14) may be configured to cover an outer circumferential surface of the electrode assembly (10).

[0049] The first electrode (11) may have a first uncoated portion (11a) formed along the winding direction at one end. The first uncoated portion (11a) may be formed at one end of the first electrode (11) constituting the electrode assembly (10). The first uncoated portion (11a) may extend along the winding direction of the electrode assembly (10). The first uncoated portion (11a) may be provided on one surface of the electrode assembly (10), and may extend upwardly from the electrode assembly (10), for example.

[0050] The battery housing (20) may be configured to accommodate an electrode assembly (10) through an opening provided on one side. The battery housing (20) may include a conductive metal. The battery housing (20) may be electrically connected to the electrode assembly (10). An electrolyte may be accommodated together with the electrode assembly (10) within the battery housing (20).

[0051] The battery cover (30) may be configured to cover an opening of the battery housing (20). The battery cover (30) may have a venting portion (30a) configured to be ruptured when the internal pressure of the battery housing (20) exceeds a reference venting pressure. The venting portion (30a) may be an area of ​​the battery cover (30) that is configured to be more vulnerable than other areas around it. The venting portion (30a) may be, for example, an area having a thinner thickness compared to the remaining areas of the battery cover (30). The venting portion (30a) may be, for example, an area with notches on both sides. The venting portion (30a) may have an extended shape to form a closed loop surrounding the approximate center of the battery cover (30). The venting portion (30a) may be formed continuously or discontinuously. In this way, when the battery (1) of the present invention is provided with a venting portion (30a), even if an abnormality occurs in the battery (1), the internal pressure of the battery (1) can be prevented from increasing above a certain level.

[0052] Meanwhile, the battery (1) of the present invention may include a first gasket (G1) interposed between the battery cover (30) and the battery housing (20) in the area covered by the battery cover (30). The first gasket (G) may strengthen the sealing force in the area covered by the battery cover (30).

[0053] Referring to FIGS. 4 to 7 together with FIG. 1, the core support (40) can be inserted into the winding center hole (10a) of the electrode assembly (10). The core support (40) can be configured to increase the rigidity of the core portion of the electrode assembly (10). The core support (40) can be configured to guide the discharge direction of gas generated inside the electrode assembly (10) toward the venting portion (30a). The core support (40) can have a hollow structure. The core support (40) can be configured to have electrical insulation properties. The core support (40) can include, for example, a ceramic material.

[0054] By providing the core support (40), it is possible to prevent the core collapse phenomenon from occurring on the inner wall surface of the winding center hole (10a). This is because the rigidity of the inner wall of the winding center hole (10a) of the electrode assembly (10) can be increased by the core support (40).

[0055] As the charging and discharging of the battery (1) is repeated, the expansion and contraction of the electrodes (11, 12) constituting the electrode assembly (10) are repeated, and accordingly, a phenomenon in which the end of the first electrode (11) in the core portion of the electrode assembly (10) bends toward the core may occur. This bending of the end of the first electrode (11) may cause damage to the first separator (13) forming the inner wall surface of the winding center hole (10a), which may increase the risk of a short circuit occurring in an area adjacent to the core portion of the electrode assembly (10). Therefore, when a structure capable of improving the rigidity of the core portion of the electrode assembly (10) is applied, as in the present invention, the problem caused by this core collapse phenomenon can be solved.

[0056] Referring to FIG. 1, the core support (40) can guide the flow of gas toward the venting portion (30a) when the venting portion (30a) of the battery cover (30) is ruptured due to an increase in the internal pressure of the battery (1) caused by gas generated inside the electrode assembly (10). That is, the gas flows from the inside of the electrode assembly (10) into the inside of the core support (40), and the introduced gas can be guided to flow toward the venting portion (30a) where the rupture occurred. If the flow of gas from the inside of the electrode assembly (10) toward the venting portion (30a) is blocked due to the core support (40) provided to improve the rigidity of the core portion of the electrode assembly (10), the pressure can act on the side of the battery (1). In this way, when the pressure acts on the side of the battery (1) and a rupture occurs at the side, a chain reaction of ignition and / or explosion of adjacently arranged batteries (1) may occur. The battery (1) of the present invention can solve this problem by having a core support (40) configured to increase the rigidity of the core portion of the electrode assembly (10) and also to induce pressure discharge through the core portion of the electrode assembly (10).

[0057] Referring to FIGS. 4 to 7, the core support (40) may have a fracture portion (40a). The fracture portion (40a) may be configured to fracture when at least one of the conditions is satisfied: when the pressure caused by the gas generated inside the electrode assembly (10) exceeds a reference fracture pressure; and when the temperature inside the battery housing (20) exceeds a reference fracture temperature. The fracture portion (40a) may fracture when the conditions described above are satisfied, thereby allowing the internal space of the electrode assembly (10) and the internal space of the core support (40) to communicate. The fracture portion (40a) may be configured to have lower rigidity compared to the remaining region of the core support (40). The fracture portion (40a) may be a region of the core support (40) where the thickness is reduced. The fracture portion (40a) may be configured to have a lower melting point compared to the remaining region of the core support (40). The melting point of the above-mentioned fracture portion (40a) can be controlled, for example, by selecting the material and / or reducing the thickness.

[0058] Referring to FIG. 5 together with FIG. 1, the fracture portion (40a) may be provided at a position closer to the second end positioned opposite the first end than to the first end positioned in the direction toward the battery cover (30) among the longitudinal ends of the core support (40). When the fracture portion (40a) is provided at such a position, gas discharge through the internal space of the core support (40) can be smoothly achieved even at a position far from the venting portion (30a).

[0059] Referring to FIG. 6 together with FIG. 1, the core support (40) may have a structure in which a first end positioned in the direction toward the battery cover (30) among its longitudinal ends is open, and a second end positioned opposite the first end is closed. When the core support (40) of the present invention has such a structure, the movement of gas introduced into the interior of the core support (40) from the electrode assembly (10) can naturally occur in the direction toward the venting portion (30a), thereby enabling smooth gas discharge.

[0060] Referring to FIG. 7 together with FIG. 1, the above-described fracture portions (40a) may be provided in multiple numbers. The multiple fracture portions (40a) may be provided spaced apart from each other along the circumference of the core support (40). Although not illustrated in the drawing, the multiple fracture portions (40a) may also be arranged spaced apart from each other along the vertical extension direction of the core support (40). In this case, when multiple fracture portions (40a) are provided, gas discharge through the internal space of the core support (40) can be more smoothly achieved.

[0061]

[0062] Next, the reinforcing member (50) of the present invention will be described with reference to FIG. 8.

[0063] FIG. 8 is a drawing showing a structure to which a reinforcing member is applied in a battery according to one embodiment of the present invention.

[0064] Referring to Fig. 8, the battery housing (20) may have a beading portion (21) having a structure that is recessed inward from the periphery of the outer surface. The beading portion (21) may be provided at a position adjacent to the opening of the battery housing (20). The beading portion (21) may function as a stopper that prevents the electrode assembly (10) from coming out of the battery housing (20). The beading portion (21) may function as a mounting portion that supports the battery cover (30). The battery housing (20) may have a crimping portion (22) that extends and bends from the beading portion (21) so as to wrap around the periphery of the edge of the battery cover (30).

[0065] A reinforcing member (50) may be filled within the space surrounded by the above beading portion (21). The reinforcing member (50) may prevent a break from occurring in the area where the beading portion (21), which may be structurally vulnerable, is formed in the battery housing (20).

[0066] The above beading portion (21) may be formed, for example, by pressing the outer surface of the battery housing (20) with a beading tool. In this case, the battery housing (20) may be elongated in the area where the beading portion (21) is formed, and thus the thickness of the battery housing (20) may be reduced. Therefore, the area where the beading portion (21) is formed may correspond to an area at high risk of being preferentially broken when the internal pressure of the battery (1) increases. Considering that the beading portion (21) may be structurally vulnerable in this way, the reinforcing member (50) may be applied to reinforce the rigidity of the battery housing (20) in the area where the beading portion (21) is formed, thereby preventing a break from occurring on the side of the battery (1) before pressure is released through the venting portion (30a).

[0067]

[0068] Next, the current collector (first current collector) (60) of the present invention will be described with reference to FIG. 9.

[0069] FIG. 9 is a drawing for comparing the inner diameter of a core support, the diameter of a winding center hole, and the diameter of a current collector hole in a battery according to one embodiment of the present invention.

[0070] Referring to FIG. 9, a battery (1) according to one embodiment of the present invention may include a current collector (first current collector) (60). The current collector (60) may be interposed between a battery cover (30) and an electrode assembly (10). The current collector (60) may be electrically coupled to the electrode assembly (10). The current collector (60) may be electrically coupled to, for example, a first non-conductive portion (11a) provided in a first electrode (11) of the electrode assembly (10). The current collector (60) may be electrically connected to a battery housing (20). The current collector (60) may be electrically coupled to an inner surface of the battery housing (20). The current collector (60) may be coupled to a beading portion (21) (see FIG. 8) of the battery housing (20).

[0071] The current collector (60) may be provided with a current collector hole (60a) formed at a position corresponding to the winding center hole (10a) of the electrode assembly (10). The diameter (D1) of the current collector hole (60a) may be formed larger than the diameter (D2) of the winding center hole (10a). In this case, when the internal pressure abnormally increases due to an abnormality in the battery (1), not only can the internal gas be smoothly discharged through the venting portion (30a), but also the core portion of the electrode assembly (10) can be smoothly discharged through the broken venting portion (30a). When the internal pressure of the battery (1) increases exceeding the critical pressure, an unwinding phenomenon of the laminate wound from the inner wall surface of the winding center hole (10a) may occur, and accordingly, a phenomenon in which the core portion of the electrode assembly (10) is discharged along the direction of pressure discharge may occur. At this time, by ensuring that the discharge of the electrode assembly (10) is smooth, the pressure can also be discharged smoothly along the discharge direction of the electrode assembly (10).

[0072] In another aspect, the diameter (D1) of the current collector hole (60a) may be formed to be larger than the inner diameter (D3) of the core support (40). The core support (40) may have a structure in which one end facing the battery cover (30) is open. If the current collector (60) covers the open portion of the core support (40), the gas discharge effect through the core support (40) may be reduced.

[0073]

[0074] Next, the lower structure of a battery (1) according to one embodiment of the present invention will be described with reference to FIG. 10.

[0075] FIG. 10 is a drawing showing the structure of a lower portion of a battery according to one embodiment of the present invention.

[0076] Referring to FIG. 10, the battery (1) may include a battery terminal (T1). The battery terminal (T1) may be electrically coupled to an electrode assembly (10). The battery terminal (T1) may be electrically connected to a second electrode (12) of the electrode assembly (10). The battery terminal (T1) may be electrically insulated from a battery housing (20). A second gasket (G2) may be provided between the battery terminal (T1) and the battery housing (20). Accordingly, the battery terminal (T1) may function as a first electrode terminal of the battery (1).

[0077] The above battery terminal (T1) can be partially inserted into the inside of the battery housing (20) through a closing portion provided on the opposite side of the opening portion of the battery housing (20). In this way, when the battery terminal (T1) is provided on the closing portion side of the housing (20), the closing portion of the battery housing (20) can function as a second electrode terminal (T2). Accordingly, the battery (1) of the present invention can have a structure in which both a positive terminal and a negative terminal are provided on the closing portion side of the battery housing (20). In this way, when both a positive terminal and a negative terminal are provided on one side of the battery (1), the task of electrically connecting a plurality of batteries (1) can be facilitated, and the electrical connection structure can be simplified, which can also lead to an improvement in energy density.

[0078] The above battery (1) may include a current collector (second current collector) (P) configured to electrically connect a battery terminal (T1) and an electrode assembly (10). The current collector (P) may be electrically connected to a second electrode (12) of the electrode assembly (10). The current collector (P) may be electrically coupled to a second non-coated portion (12a) provided on the second electrode (12). The second non-coated portion (12a) may extend from one end of the second electrode along the winding direction of the electrode assembly (10). The second non-coated portion (12a) may be provided on a surface opposite to a surface on which the first non-coated portion (11a) is provided among both surfaces of the electrode assembly (10), and may extend, for example, downwardly of the electrode assembly (10).

[0079] The above current collector (P) can be electrically connected to the battery terminal (T1). For example, the current collector (P) and the battery terminal (T1) can be welded by irradiating a laser through the winding center hole (10a) of the electrode assembly (10) from the open side of the battery housing (20) or by inserting a welding tool.

[0080] When the battery (1) of the present invention has a current collector (P), an insulator (IS) may be interposed between the current collector (P) and the closed portion of the battery housing (20). The insulator (IS) may prevent contact between the current collector (P) and the battery housing (20), which are configured to have different polarities.

[0081]

[0082] Next, a battery pack (3) according to an embodiment of the present invention will be described with reference to FIG. 11. FIG. 11 is a drawing showing a battery pack according to an embodiment of the present invention.

[0083] Referring to FIG. 11, a battery pack (3) according to one embodiment of the present invention may include at least one battery (1) of the present invention as described above. The battery (1) may be accommodated in a pack housing (2). The battery pack (3) may include components for electrical connection of the batteries (1) and / or a BMS (Battery Management System) configured to control charging and discharging of the batteries (1).

[0084] Next, with reference to Fig. 12, a vehicle (5) according to one embodiment of the present invention will be described. Fig. 12 is a drawing showing a vehicle according to one embodiment of the present invention.

[0085] Referring to FIG. 12, a vehicle (5) according to one embodiment of the present invention includes at least one battery pack (3). The vehicle (5) may be configured to operate by receiving power from the battery pack (3). The vehicle (5) may be, for example, a hybrid electric vehicle (HEV) or an electric vehicle (EV).

[0086]

[0087] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0088] [Explanation of symbols]

[0089] 1: Battery

[0090] 2: Pack housing

[0091] 3: Battery pack

[0092] 5: Car

[0093] 10: Electrode assembly

[0094] 10a: Winding center hole

[0095] 11: First electrode

[0096] 11a: 1st Military Department

[0097] 12: Second electrode

[0098] 12a: 2nd Muji Department

[0099] 13: First membrane

[0100] 14: Second membrane

[0101] 20: Battery housing

[0102] 21: Bidding Department

[0103] 22: Crimping section

[0104] 30: Battery cover

[0105] 30a: Venting section

[0106] G1: First gasket

[0107] 40: Core support

[0108] 40a: Breaking point

[0109] 50: Reinforcing member

[0110] 60: Whole house (first whole house)

[0111] 60a: Whole house hall

[0112] T1: Battery terminal (first electrode terminal)

[0113] T2: Closure (second electrode terminal)

[0114] G2: Second gasket

[0115] P: Whole house (second whole house)

[0116] IS: Insulator

Claims

1. An electrode assembly having a structure wound around a winding center hole; A battery housing configured to receive the electrode assembly through an opening provided on one side; A battery cover configured to cover the opening of the battery housing and having a venting portion configured to rupture when the internal pressure of the battery housing exceeds a reference venting pressure; and A core support configured to be inserted into the winding center hole of the electrode assembly to increase the rigidity of the core portion of the electrode assembly and configured to guide the discharge direction of gas generated inside the electrode assembly toward the venting portion; A battery containing:

2. In paragraph 1, The above core support is, A battery characterized by having a hollow structure.

3. In paragraph 1, The above core support is, A battery characterized in that it is configured to have electrical insulation properties.

4. In paragraph 1, The above core support is, A battery characterized by having a rupture part configured to rupture when at least one of the conditions is satisfied: when pressure due to gas generated inside the electrode assembly exceeds a reference rupture pressure; and when the temperature inside the battery housing exceeds a reference rupture temperature.

5. In paragraph 4, The above-mentioned fractured part is, A battery characterized in that the second end, which is located opposite the first end, is provided at a position closer to the battery cover than the first end, which is located in the direction facing the battery cover, among the longitudinal ends of the core support.

6. In paragraph 1, The above core support is, A battery characterized in that a first end positioned in the direction toward the battery cover among the longitudinal ends has an open structure, and a second end positioned opposite the first end has a closed structure.

7. In paragraph 4, The above-mentioned breaking part is provided in multiple numbers, A battery characterized in that the plurality of said fracture portions are provided spaced apart from each other along the periphery of the core support.

8. In paragraph 1, A battery characterized in that the battery housing has a beading portion having a structure that is recessed inward from the outer peripheral surface.

9. In paragraph 8, A battery characterized in that a reinforcing member is filled within the space surrounded by the above beading portion.

10. In paragraph 1, The above battery, A battery characterized by including a current collector electrically connected to the electrode assembly and interposed between the battery cover and the electrode assembly.

11. In paragraph 10, The above entire house, A battery characterized by having a current collector hole formed at a position corresponding to the above-mentioned winding center hole.

12. In paragraph 11, The diameter of the above-mentioned collector hole is A battery characterized in that the diameter of the above-mentioned winding center hole is formed larger than that of the above-mentioned winding center hole.

13. In paragraph 11, The diameter of the above-mentioned collector hole is A battery characterized in that the inner diameter of the core support is formed larger than that of the core support.

14. A battery pack comprising a battery according to any one of claims 1 to 13.

15. A vehicle comprising a battery pack according to Article 14.

Images