BATTERY, BATTERY SET INCLUDING THE BATTERY, AND VEHICLE INCLUDING THE BATTERY SET

Abstract

A battery according to one embodiment of the present invention may comprise: an electrode assembly; a battery housing for accommodating the electrode assembly through an opening formed at one side thereof; a battery terminal electrically connected to the electrode assembly through a closing part provided at the opposite side of the opening of the battery housing; and a current collector including a first coupling part, which is electrically coupled to the electrode assembly, and a second coupling part, which is electrically coupled to the battery terminal and has a resistance increase region formed in at least one portion thereof.

Description

1 / 17 BATTERY, BATTERY SET INCLUDING THE BATTERY, AND VEHICLE INCLUDING THE FIELD BATTERY SET OF THE TECHNOLOGY

[001] The present description refers to a battery, a battery pack that includes the battery, and a vehicle that includes the battery pack.

[002] This application is based on and claims priority from Korean Patent Application Number 10-2023-0110068, filed on August 22, 2023 with the Korean Intellectual Property Office, the description of which is incorporated herein in its entirety by reference. PRECEDENT TECHNIQUE

[003] Fuse devices currently used in secondary batteries include PTC (positive temperature coefficient thermistor) and TCO (thermal cutoff) thermistors. However, PTC or TCO have the disadvantage that their resistance increases as operation is repeated, thereby increasing overall resistance in the circuit.

[004] Also, the aforementioned devices are all operated by heat generation due to overcurrent. In other words, the aforementioned devices correspond to devices that operate to block the flow of current only when an overcurrent is generated in the circuit current path due to overload or similar, and thus the temperature increases as a result.

[005] Therefore, the aforementioned devices can operate and block overcurrent only after safety has already been compromised due to heat generation, and are not capable of blocking overcurrent immediately when a cause for temperature increase occurs. Even if the internal pressure increases due to an abnormal temperature rise within the secondary battery, safety problems such as ignition or explosion may occur. Petition 870250081275, dated 10 / 09 / 2025, page 6 / 40 2 / 17 if the overcurrent is not blocked at the appropriate time.

[006] Furthermore, since the aforementioned devices simply operate depending on temperature, these devices make it difficult to use them in high-performance secondary batteries, as well as secondary batteries for battery packs used in vehicles. In other words, a battery pack for a vehicle requires a high C-rate and consequently generates a large amount of heat. However, devices such as PTC thermistors (positive temperature coefficient thermistors), TCOs (thermal cut-offs), and thermal fuses have the problem that they may operate prematurely when placed in such a high-temperature environment.

[007] Therefore, a secondary battery is needed with a structure that can be used even in environments where high currents flow and that can block the current in advance when events that could cause a temperature increase (for example, an increase in the internal pressure of a secondary battery) occur before the temperature rises to a level that could cause a safety problem. INVENTION TECHNICAL PROBLEM

[008] The present invention is designed to solve the problems of the relevant art and, therefore, the present invention is directed to quickly cutting off the electrical connection in the event that an overcurrent exceeding a standard value occurs in a battery.

[009] However, the technical object to be solved by the present invention is not limited to the above, and other objects not mentioned here will be clearly understood by those skilled in the art from the following description. TECHNICAL SOLUTION Petition 870250081275, dated 10 / 09 / 2025, page 7 / 40 3 / 17

[0010] In one aspect of the present invention, a battery is provided comprising: an electrode assembly; a battery housing configured to accommodate the electrode assembly through an open portion formed on one side thereof; a battery terminal configured to be electrically connected to the electrode assembly through a closed portion formed on a side opposite the open portion of the battery housing; and a current collector having a first coupling portion electrically coupled to the electrode assembly and a second coupling portion electrically coupled to the battery terminal and having a resistance-boosting region formed in at least part thereof.

[0011] The resistance-boosting region may be configured to have a smaller cross-sectional area compared to the remaining region of the second coupling portion.

[0012] The resistance increase region can be configured to have a thinner thickness compared to the remaining region of the second coupling portion.

[0013] The region of increased resistance may include a groove line formed on one surface or both surfaces of the second coupling portion.

[0014] The groove line may extend along a circumferential direction of the battery.

[0015] The resistance increase region may include a plurality of groove lines formed on one or both surfaces of the second coupling portion. The plurality of groove lines may be spaced from each other along a radial direction of the battery.

[0016] The plurality of groove lines can be spaced from each other along a circumferential direction of the battery.

[0017] A welding portion can be provided in a region Petition 870250081275, dated 10 / 09 / 2025, page 8 / 40 4 / 17 where the second coupling portion and the battery terminal are coupled. The welding portion can be provided in a region where the resistance increase region is not formed.

[0018] The resistance increase region can be configured to surround the welding portion.

[0019] The electrode assembly may have a structure in which a battery comprising a first electrode, a second electrode, and a separator interposed between the first and second electrodes is wound. The resistance increase region may be provided in a position corresponding to an inner side of a central winding hole formed by winding the electrode assembly.

[0020] The battery may further comprise a protective member configured to cover an inner wall surface of the central winding hole at an inlet of the central winding hole facing the current collector.

[0021] The first coupling portion and the second coupling portion of the current collector can be positioned away from each other along a radial direction of the battery.

[0022] The current collector may include a hoop portion positioned on an outer periphery of the first coupling portion and the second coupling portion; and a connection portion configured to connect the hoop portion and the second coupling portion.

[0023] In another aspect of the present invention, a battery pack is also provided, comprising: the battery according to an embodiment of the present invention.

[0024] In another aspect of the present invention, a vehicle is also provided, comprising the battery pack according to an embodiment of the present invention. ADVANTAGEOUS EFFECTS Petition 870250081275, dated 10 / 09 / 2025, page 9 / 40 5 / 17

[0025] According to one aspect of the present invention, when an overcurrent exceeding a standard value occurs in a battery, the electrical connection can be quickly cut, thereby ensuring the safe use of the battery.

[0026] However, the advantageous effects that can be derived through the present invention are not limited to the effects described above, and other advantageous effects not mentioned above will be clearly understood by those skilled in the art of the following invention. DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings illustrate a preferred embodiment of the present invention and, together with the description above, serve to provide a better understanding of the technical features of the present invention and, therefore, the present invention is not interpreted as being limited to the drawing.

[0028] Figure 1 is a diagram showing the structure of an upper portion of a battery, according to an embodiment of the present invention.

[0029] Figure 2 is a drawing showing a resistance increase region provided in a current collector (first current collector), according to an embodiment of the present invention.

[0030] Figure 3 is a cross-sectional view taken along line AA' in Figure 2.

[0031] Figures 4 and 5 are drawings that show exemplary forms of the resistance-enhancing region of the present invention.

[0032] Figures 6 and 7 are drawings showing the positional relationship of the resistance increase region provided in the current collector (first current collector), according to an embodiment of the present invention, and a welded portion formed in a current collector. Petition 870250081275, dated 10 / 09 / 2025, page 10 / 40 6 / 17

[0033] Figure 8 is a drawing to explain the position of formation of the resistance increase region of the present invention.

[0034] Figure 9 is a drawing showing a battery to which the protective member of the present invention is applied.

[0035] Figure 10 is a drawing showing an exemplary form of the current collector (first current collector) of the present invention.

[0036] Figure 11 is a drawing showing the structure of a lower portion of the battery, according to an embodiment of the present invention.

[0037] Figure 12 is a diagram showing a battery array, according to an embodiment of the present invention.

[0038] Figure 13 is a drawing showing a vehicle, according to an embodiment of the present invention. BEST WAY

[0039] Hereafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and appended claims should not 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 invention proposed here is only a preferred example for illustrative purposes only, and is not intended to limit the scope of the invention; therefore, it should be understood that other equivalents and modifications could be made to this invention without departing from the scope of the invention.

[0040] First, a battery 1, according to an embodiment of the present invention, will be described with reference to Figures 1 to 3. A Petition 870250081275, dated 10 / 09 / 2025, page 11 / 40 7 / 17 Figure 1 is a diagram showing the structure of an upper portion of a battery, according to an embodiment of the present invention. Figure 2 is a drawing showing a resistance increase region provided in a current collector (first current collector), according to an embodiment of the present invention. Figure 3 is a cross-sectional view made along line AA' of Figure 2.

[0041] Referring to Figures 1 to 3, battery 1, according to one embodiment of the present invention, may include an electrode assembly 10, a battery housing 20, a battery terminal 30 and a current collector (first current collector) 40. Battery 1 may be a secondary battery configured to be capable of charging and discharging. Battery 1 may be, for example, a cylindrical battery.

[0042] The electrode assembly 10 may include a first electrode having a first polarity, a second electrode having a second polarity opposite to the first polarity, and a separator interposed between the first electrode and the second electrode. The electrode assembly 10 may have a form in which a stack including the first electrode, the second electrode, and the separator is wound in one direction. When the electrode assembly 10 has such a wound form, a central winding hole 10a may be formed in a region that becomes a winding center.

[0043] The first electrode may include a first uncoated portion 11, which is a region in which an active electrode material is not coated. The first uncoated portion 11 may extend along a winding direction of the electrode assembly 10 from one end of the first electrode. Consequently, the first uncoated portion 11 may be provided on a first surface that is approximately perpendicular to an outer circumference of the electrode assembly 10. Petition 870250081275, dated 10 / 09 / 2025, page 12 / 40 8 / 17

[0044] The second electrode may include a second uncoated portion 12, which is a region in which an active electrode material is not coated (see Figure 11). The second uncoated portion 12 may extend along the winding direction of the electrode assembly 10 from one end of the second electrode. Consequently, the second uncoated portion 12 may be provided on a second surface (a surface located on an opposite side to the first surface) that is approximately perpendicular to the outer circumference of the electrode assembly 10.

[0045] Although not specifically illustrated in the drawings, the first uncoated portion 11 and / or the second uncoated portion 12 may include a plurality of segments formed by splitting along the winding direction of the electrode assembly 10. The segments may be formed by notches in the first uncoated portion 11 and / or the second uncoated portion 12 to a predetermined depth. The plurality of segments may be folded approximately along the radial direction of the electrode assembly 10. In this case, some of the segments adjacent to each other along the radial direction may overlap each other.

[0046] The battery housing 20 can be configured to accommodate the electrode assembly 10 through an open portion formed on one side thereof. The battery housing 20 can have a closed portion formed on a side opposite the open portion. The battery housing 20 can include a conductive metal. The battery housing 20 can be electrically connected to the second electrode of the electrode assembly 10.

[0047] Battery terminal 30 can be configured to be electrically connected to electrode assembly 10 via the closed portion provided on a side opposite the open portion of battery housing 20. Battery terminal 30 can be electrically connected, Petition 870250081275, dated 10 / 09 / 2025, page 13 / 40 9 / 17 for example, to the first electrode of the electrode assembly 10. In this case, battery terminal 30 can function as a first terminal of battery 1. Battery terminal 30 and battery housing 20 can have opposite polarities and, in this case, a first sealing member G1 can be provided between battery housing 20 and battery terminal 30 to prevent contact between these parts and to ensure the sealing of battery housing 20.

[0048] The battery terminal 30 may include a first portion 31 and a second portion 32. The first portion 31 may be configured to be electrically coupled to the current collector 40 on the inner side of the battery housing 20. The first portion 31 may be provided in a position corresponding to the central winding hole 10a of the electrode assembly 10. The second portion 32 may be exposed to the outside of the battery housing 20. The second portion 32 may be located approximately in the center of the closed portion of the battery housing 20. The battery terminal 30 may include a third portion 33 provided on the outer side of the first portion 31. The third portion 33 may be riveted towards the closed portion of the battery housing 20 to secure the battery terminal 30 to the battery housing 20.

[0049] Current collector 40 can be configured to electrically connect battery terminal 30 and electrode assembly 10. Current collector 40 can be electrically connected to the first electrode of electrode assembly 10. An insulator IS can be interposed between current collector 40 and an inner surface of the closed portion of the battery housing 20 to prevent contact between the battery housing 20 and current collector 40 which have opposite polarities.

[0050] Current collector 40 can be arranged on the first surface of electrode assembly 10. Current collector 40 can Petition 870250081275, dated 10 / 09 / 2025, page 14 / 40 10 / 17 include a first coupling portion 41 and a second coupling portion 42. The first coupling portion 41 can be configured to be electrically coupled to the electrode assembly 10. The first coupling portion 41 can be coupled to the first uncoated portion 11 of the electrode assembly 10. The first coupling portion 41 can be coupled to a coupling surface formed by the bending of the first uncoated portion 11. At least part of the first coupling portion 41 can be coupled to the first uncoated portion 11 in a region where the number of overlapping layers of the segments of the first uncoated portion 11 is maximized. The second coupling portion 42 can be electrically coupled to the battery terminal 30. The second coupling portion 42 can be electrically coupled to the first portion 31 of the battery terminal 30.The second coupling portion 42 can be welded to the first portion 31 of the battery terminal 30 by a welding tool inserted through the central winding hole 10a of the electrode assembly 10 or by a laser irradiated through the central winding hole 10a.

[0051] Meanwhile, the second coupling portion 42 may have a resistance increase region 40a formed in at least part of it. At least part of the resistance increase region 40a may be located within a region where the battery terminal 30 and the current collector 40 are in contact with each other. The resistance increase region 40a may be configured to have a smaller cross-sectional area compared to the remaining region of the second coupling portion 42. The resistance increase region 40a may be configured to have a thinner thickness compared to the remaining region of the second coupling portion 42, for example, as illustrated in Figure 3. Petition 870250081275, dated 10 / 09 / 2025, page 15 / 40 11 / 17

[0052] Thus, as battery 1 of the present invention is configured to have a region where the resistance partially increases in the current collector 40, when an overcurrent occurs due to an abnormality in battery 1, the overcurrent can be quickly blocked by breaking the current collector 40 itself and / or damaging the coupling portion of the current collector 40 and the battery terminal 30.

[0053] Next, various embodiments of the resistance increase region 40a of the present invention will be described with reference to Figures 4 and 5, together with Figures 1 to 3. Figures 4 and 5 are drawings showing a resistance increase region provided in a current collector (first current collector) according to an embodiment of the present invention, which show various embodiments of a groove line that constitutes the resistance increase region.

[0054] Referring to Figures 4 and 5, together with Figures 1 to 3, the resistance increase region 40a may include a groove line L formed on one or both surfaces of the second coupling portion 42 of the current collector 40. The groove line L may be formed at a predetermined depth on one or both surfaces of the second coupling portion 42. The groove line L may extend along the circumferential direction of battery 1. The groove line L may be provided in an approximately closed loop form. The resistance region 40a may include a plurality of groove lines L. The plurality of groove lines L may be arranged to be spaced from each other along the circumferential direction of the battery. The plurality of groove lines L may be arranged to be spaced from each other along the radial direction of battery 1.

[0055] Next, the positional relationship of the region of increase of re Petition 870250081275, dated 10 / 09 / 2025, page 16 / 40 12 / 17 resistance 40a and the welding portion W of the present invention will be described with reference to Figures 6 and 7, together with Figures 1 to 3. Figures 6 and 7 are drawings showing the positional relationship of the resistance increase region provided in the current collector (first current collector), according to an embodiment of the present invention, and a welding portion formed in a current collector.

[0056] Referring to Figures 6 and 7, together with Figures 1 to 3, a welding portion W can be provided in a region where the second coupling portion 42 of the current collector 40 of the present invention and the battery terminal 30 are coupled. The welding portion W can be provided in a region where the resistance increase region 40a is not formed. According to this configuration, when welding is performed for coupling between the battery terminal 30 and the current collector 40, it is possible to prevent the groove line L, which constitutes the resistance increase region 40a, from melting and thus the cross-sectional area decrease region from being removed.

[0057] The resistance increase region 40a can be configured to surround the welding portion W. For example, when the resistance increase region 40a includes a groove line L that has an approximately closed loop shape, the welding portion W can be located within a space surrounded by the groove line L. Alternatively, the welding portion W can be located between adjacent groove lines L that are spaced apart, as illustrated in Figure 7. When the welding portion W and the resistance increase region 40a are arranged in this way, a current flowing from the battery terminal 30 to the electrode assembly 10 through the current collector 40 passes through the resistance increase region 40a in the current collector. Petition 870250081275, dated 10 / 09 / 2025, page 17 / 40 13 / 17 relative to 40. Therefore, when an overcurrent occurs, a rapid breakdown can occur in the resistance increase region of 40a, thus improving safety in the use of battery 1.

[0058] Next, the relative positional relationship between the resistance increase region 40a of the present invention and the electrode assembly 10 will be explained with reference to Figure 8. Figure 8 is a drawing to explain the formation position of the resistance increase region of the present invention.

[0059] Referring to Figure 8, the resistance increase region 40a of the present invention may be located within a region corresponding to the inner side of the central winding hole 10a formed due to the winding of the electrode assembly 10. That is, the resistance increase region 40a may be located within a region indicated by an arrow in Figure 8. According to this configuration, even if an overcurrent occurs during the use of battery 1, such that a rupture occurs in the resistance increase region 40a, foreign matter caused by the rupture may fall through the central winding hole 10a, thereby minimizing the possibility of foreign matter being introduced into the electrode assembly 10.

[0060] Next, a protective member 50 of the present invention will be described with reference to Figure 9. Figure 9 is a drawing showing a battery to which the protective member of the present invention is applied.

[0061] Referring to Figure 9, battery 1 of the present invention may include a protective member 50 configured to cover an inner wall surface of the central winding hole 10a at an inlet of the central winding hole 10a facing the current collector 40. If battery 1 of the present invention includes the protective member 50 as described above, when a foreign substance Petition 870250081275, dated 10 / 09 / 2025, page 18 / 40 14 / 17 generated during the rupture of the resistance increase region 40a enters the central winding hole 10a, the risk of damage to the separator positioned on the inner wall surface of the central winding hole 10a by the foreign substance can be reduced.

[0062] The protective member 50 can be configured to cover only a portion of the entire inner wall surface region of the central winding hole 10a. The protective member 50 can be configured to cover only a region adjacent to the current collector 40 within the entire inner wall surface region of the central winding hole 10a. With this configuration, the phenomenon of electrolyte impregnation through the inner wall surface of the central winding hole 10a being hindered can be minimized.

[0063] Next, an exemplary embodiment of the current collector 40 of the present invention will be described with reference to Figure 10. Figure 10 is a drawing showing an exemplary embodiment of the current collector (first current collector) of the present invention.

[0064] Referring to Figure 10, the current collector 40 of the present invention may have a structure in which the first coupling portion 41 and the second coupling portion 42 described above are spaced from each other along the radial direction. The current collector 40 of the present invention may include a ring portion 43 positioned on an outer periphery of the first coupling portion 41 and the second coupling portion 42. The current collector 40 may include a connection portion 44 configured to connect the ring portion 43 and the second coupling portion 42. If the first coupling portion 41 and the second coupling portion 42 are not directly connected to each other, but are indirectly connected through the ring portion 43 in this way, the shock applied to battery 1 may be dispersed. That is, it is pos Petition 870250081275, dated 10 / 09 / 2025, page 19 / 40 15 / 17 It is possible to minimize the shock applied to the welding portion of the first coupling portion 41 from being transmitted to the welding portion of the second coupling portion 42, and it is also possible to minimize the shock applied to the welding portion of the second coupling portion 42 from being transmitted to the first coupling portion 41.

[0065] Next, with reference to Figure 11, a lower portion of battery 1 according to an embodiment of the present invention will be described. Figure 11 is a drawing showing the structure of a lower portion of the battery, according to an embodiment of the present invention.

[0066] Referring to Figure 11, the battery 1 according to one embodiment of the present invention may include a current collector (second current collector) 60. The current collector 60 may be configured to electrically connect the electrode assembly 10 and the battery housing 20. The current collector 60 may be electrically connected to the second electrode of the electrode assembly 10. The current collector 60 may be electrically coupled to the second uncoated portion 12 provided on the second surface of the electrode assembly 10. The current collector 60 may be electrically coupled to the inner surface of the battery housing 20. The current collector 60 may be electrically coupled to the crimp portion 21 formed by press-fitting an outer circumference of the battery housing 20.

[0067] Battery 1 may include a cover 70. The cover 70 may be configured to close the open portion of the battery housing 20. The cover 70 may be secured by a crimping portion 22 configured to extend and bend from the crimping portion 21 of the battery housing 20 and encircle a peripheral edge of the cover 70. A sealing member (second sealing member) G2 may be interposed. Petition 870250081275, dated 10 / 09 / 2025, page 20 / 40 16 / 17 between the cover 70 and an inner surface of the battery housing 20. The cover 70 may include a vent portion 71 configured to be weaker compared to the remaining region. The vent portion 71 may be configured to partially reduce the thickness of the cover 70. The vent portion 71 may be configured to rupture when the internal pressure of the battery 1 increases to a predetermined pressure or more.

[0068] Next, a battery assembly 3, according to an embodiment of the present invention, will be described with reference to Figure 12. Figure 12 is a diagram showing a battery assembly, according to an embodiment of the present invention.

[0069] Referring to Figure 12, together with Figures 1 and 11, the battery assembly 3, according to one embodiment of the present invention, may include battery 1, according to one embodiment of the present invention, and an assembly housing 2 configured to accommodate battery 1. Battery 1 may be provided in plurality, and the plurality of batteries 1 may be electrically connected to each other. Battery 1, of the present invention, may be configured so that the battery terminal 30 and the closed portion of the battery housing 20 may function as a first electrode terminal and a second electrode terminal, respectively. Therefore, when arranging a plurality of batteries 1 in the assembly housing 2, all batteries 1 may be arranged so that the terminals 30 face upwards and thus the electrical connection may be made on top of the batteries 1.

[0070] Next, a vehicle 5, according to an embodiment of the present invention, will be described with reference to Figure 13. Figure 13 is a drawing showing a vehicle, according to an embodiment of the present invention.

[0071] Referring to Figure 13, vehicle 5, according to a mo Petition 870250081275, dated 10 / 09 / 2025, page 21 / 40 17 / 17 The present invention may include battery pack 3, according to one embodiment of the present invention. Vehicle 5 may be configured to operate by receiving power from battery pack 3. Vehicle 5 may be, for example, an electric vehicle or a hybrid electric vehicle.

[0072] The present invention has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, as various alterations and modifications within the scope of the invention will be apparent to those skilled in the art of this detailed invention. REFERENCE SYMBOLS 1: battery 2: Joint accommodation 3: battery pack 5: vehicle 10: electrode assembly 20: battery housing 30: battery terminal 40: current collector (first current collector) 40a: region of increased resistance L: groove line 50: protection member Petition 870250081275, dated 10 / 09 / 2025, page 22 / 40

Claims

1 / 3 CLAIMS 1. Battery, characterized in that it comprises: an electrode assembly; a battery housing configured to accommodate the electrode assembly through an open portion formed on one side thereof; a battery terminal configured to be electrically connected to the electrode assembly through a closed portion formed on a side opposite the open portion of the battery housing; and a current collector having a first coupling portion electrically coupled to the electrode assembly and a second coupling portion electrically coupled to the battery terminal and having a resistance-increasing region formed in at least one part thereof.

2. Battery, according to claim 1, characterized in that the resistance increase region is configured to have a smaller cross-sectional area compared to the remaining region of the second coupling portion.

3. Battery, according to claim 1, characterized in that the resistance-boosting region is configured to have a thinner thickness compared to the remaining region of the second coupling portion.

4. Battery according to claim 1, characterized in that the resistance increase region includes a groove line formed on one or both surfaces of the second coupling portion.

5. Battery, according to claim 4, characterized in that the groove line extends along a circumferential direction of the battery.

6. Battery, according to claim 1, characterized in that the resistance increase region includes a plurality of groove lines formed on one or both surfaces of the second coupling portion, and wherein the plurality of groove lines are spaced from each other along a radial direction of the battery.

7. Battery, according to claim 1, characterized in that the resistance increase region includes a plurality of groove lines formed on one or both surfaces of the second coupling portion, and wherein the plurality of groove lines are spaced from each other along a circumferential direction of the battery.

8. Battery, according to claim 1, characterized in that a welding portion is provided in a region where the second coupling portion and the battery terminal are coupled, and in that the welding portion is provided in a region where the resistance increase region is not formed.

9. Battery, according to claim 1, characterized in that a welding portion is provided in a region where the second coupling portion and the battery terminal are coupled, and wherein the resistance-boosting region is configured to surround the welding portion.

10. Battery, according to claim 1, characterized in that the electrode assembly has a structure in which a stack including a first electrode, a second electrode and a separator interposed between the first electrode and the second electrode is wound, and in which the resistance increase region is provided in a position corresponding to an inner side of a central winding hole formed due to the winding of the electrode assembly.

11. Battery, according to claim 10, characterized in that it further comprises: a protective member configured to cover a surface of the inner wall of the central winding hole at an inlet of the central winding hole facing the current collector.

12. Battery, according to claim 1, characterized in that the first coupling portion and the second coupling portion of the current collector are positioned away from each other along a radial direction of the battery.

13. Battery, according to claim 1, characterized in that the current collector includes: a ring portion positioned on an outer periphery of the first coupling portion and the second coupling portion; and a connection portion configured to connect the ring portion and the second coupling portion.

14. Battery pack, characterized in that it comprises the battery as defined in any one of claims 1 to 13.

15. Vehicle, characterized by the fact that it comprises the battery pack as defined in claim 14. Petition 870250081275, dated 10 / 09 / 2025, page 25 / 40

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