Battery, and battery pack and vehicle comprising same

Abstract

The present invention relates to a battery comprising: an electrode assembly; a battery housing configured to accommodate the electrode assembly through an open portion formed on one side of the battery housing; a battery terminal configured to be electrically connected to the electrode assembly through a closed portion provided on the opposite side of the open portion of the battery housing; and a current collector comprising a first coupling portion configured to be electrically coupled to the electrode assembly, a second coupling portion configured to be electrically coupled to the battery terminal, and a bridge portion which is configured to electrically connect the first coupling portion and the second coupling portion and in which at least a portion of a region adjacent to the second coupling portion has a reduced cross-sectional area.

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. 10-2023-0156709, filed on November 13, 2023, the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Korean Patent Application No. 10-2024-0062722, filed on May 13, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0004] Current fuse devices used in secondary batteries include PTC thermistors (positive temperature coefficient thermistors) and TCOs (thermal cut-outs). However, PTC and TCOs have a drawback: their inherent resistance increases with repeated operation, increasing the overall resistance of the circuit.

[0005] In addition, all of the above-mentioned devices are operated by heat generation due to overcurrent. In other words, the above-mentioned devices are devices that operate to block the flow of current only when overcurrent is generated in the circuit current path due to overcharging, etc., and this causes the temperature to rise.

[0006] Therefore, for the aforementioned devices, overcurrent protection only begins to occur after overheating has already jeopardized safety, and cannot be immediately interrupted when a cause that could cause a temperature rise occurs. Even if the internal pressure increases due to an abnormal rise in temperature within the secondary battery, if overcurrent protection is not implemented at an appropriate time, safety issues such as fire or explosion may arise.

[0007] In addition, since the above-mentioned devices operate simply based on temperature, they are difficult to use in secondary batteries that exhibit high output, such as battery packs used in automobiles. In other words, automobile battery packs require a high c-rate, which inevitably leads to a lot of heat generation. However, devices such as PTC thermistors (positive temperature coefficient thermistors), TCOs (thermal cut-outs), and thermal fuses have the problem of operating prematurely when exposed to such high-temperature environments.

[0008] Therefore, a secondary battery is needed that can be used in an environment where high current flows and has a structure that can cut off the current in advance when an event that could cause the temperature to rise (e.g., an increase in the internal pressure of the secondary battery) occurs before the temperature rises to a level that could cause a safety issue.

[0009] The present invention was created in consideration of the above-described problems, and its primary purpose is to enable rapid disconnection of electrical connection when an overcurrent exceeding a standard value occurs in a battery.

[0010] 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.

[0011] According to one embodiment of the present invention, a battery may include: an electrode assembly; a battery housing configured to receive the electrode assembly through an opening formed on one side thereof; a battery terminal configured to be electrically connected to the electrode assembly through a closing portion provided on an opposite side of the opening portion of the battery housing; and a current collector having a first coupling portion configured to be electrically connected to the electrode assembly, a second coupling portion configured to be electrically connected to the battery terminal, and a bridge portion configured to electrically connect between the first coupling portion and the second coupling portion, and at least a portion of a region adjacent to the second coupling portion is configured to have a reduced cross-sectional area.

[0012] The above bridge portion may include a first region configured to be connected to the second coupling portion, and a second region provided at a predetermined distance from the first region in a direction away from the second coupling portion.

[0013] The width of the first region may be configured to be smaller than the width of the second region.

[0014] The distance from the center of the second joint to the first region may be configured to be 0.5 times or less of the radius of the entire collector.

[0015] The above bridge portion may be configured so that the width gradually decreases as it moves from the second region toward the first region.

[0016] The above first region may include a notch formed on at least one side in the width direction of the bridge portion.

[0017] In the area from the second area to the notch portion, the width of the bridge portion can be configured to be constant.

[0018] The first coupling portion and the second coupling portion may be positioned spaced apart from each other along the radial direction of the electrode assembly.

[0019] The above-mentioned collector may have a slit line configured to mutually space the first coupling portion and the second coupling portion.

[0020] The above-described collector has a rim portion positioned on the outer periphery of the first coupling portion and the second coupling portion, and the bridge portion can be configured to connect the rim portion and the second coupling portion.

[0021] A battery pack according to the present invention may include a battery according to the present invention.

[0022] A vehicle according to the present invention may include a battery pack according to the present invention.

[0023] 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 off, thereby ensuring safety in battery use.

[0024] In addition, the present invention may have various other effects, which will be described in each embodiment configuration, or an explanation of effects that can be easily inferred by a person skilled in the art will be omitted.

[0025] 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.

[0026] FIG. 1 is a drawing showing the structure of an upper portion of a battery according to one embodiment of the present invention.

[0027] FIG. 2 is a drawing showing a current collector (first current collector) included in a battery according to one embodiment of the present invention.

[0028] FIG. 3 is a drawing showing a current collector (first current collector) included in a battery according to another embodiment of the present invention.

[0029] FIG. 4 is a CT image of a first portion of a current collector (first current collector) included in a battery according to one embodiment of the present invention in which overcurrent occurs, and the first portion is fused.

[0030] FIG. 5 is a diagram showing a temperature distribution according to the position of a current collector (first current collector) included in a battery according to one embodiment of the present invention.

[0031] Figure 6 is a temperature graph by location of the current collector (first current collector) of Figure 5.

[0032] FIG. 7 is a drawing showing the structure of a lower portion of a battery according to one embodiment of the present invention.

[0033] FIG. 8 is a drawing showing a battery pack according to one embodiment of the present invention.

[0034] FIG. 9 is a drawing showing a vehicle according to one embodiment of the present invention.

[0035] 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 construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0036] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0037] Furthermore, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar components will be omitted, and the differences will be described.

[0038]

[0039] First, a battery (1) according to one embodiment of the present invention will be described with reference to FIGS. 1 to 4.

[0040] FIG. 1 is a drawing showing the structure of the upper portion of a battery according to one embodiment of the present invention. In addition, FIG. 2 is a drawing showing a current collector (a first current collector) included in a battery according to one embodiment of the present invention, and FIG. 3 is a drawing showing a current collector (a first current collector) included in a battery according to another embodiment of the present invention. In addition, FIG. 4 is a CT image showing a state in which a first portion of a current collector (a first current collector) included in a battery according to one embodiment of the present invention is fused when an overcurrent occurs.

[0041] Referring to FIGS. 1 to 3, a 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). The battery (1) may be a secondary battery configured to be chargeable and dischargeable. The 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 laminate 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 winding center hole (10a) may be formed in a region that becomes the winding center.

[0043] The first electrode may include a first uncoated portion (11), which is a region where an electrode active material is not applied. The first uncoated portion (11) may extend from one end of the first electrode along the winding direction of the electrode assembly (10). Accordingly, the first uncoated portion (11) may be provided on a first surface that is approximately perpendicular to the outer circumferential surface of the electrode assembly (10).

[0044] The second electrode may include a second non-coated portion (12), which is an area where an electrode active material is not applied (see FIG. 6). The second non-coated portion (12) may extend from one end of the second electrode along the winding direction of the electrode assembly (10). Accordingly, the second non-coated portion (12) may be provided on a second surface (a surface located on the opposite side to the first surface) that is approximately perpendicular to the outer circumferential surface of the electrode assembly (10).

[0045] Although not specifically illustrated in the drawing, the first uncoated portion (11) and / or the second uncoated portion (12) may include a plurality of segments formed by being divided along the winding direction of the electrode assembly (10). These segments may be formed by notching the first uncoated portion (11) and / or the second uncoated portion (12) to a predetermined depth. The plurality of segments may be bent 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) may be configured to accommodate an electrode assembly (10) through an opening formed on one side thereof. The battery housing (20) may have a closing portion formed on the opposite side of the opening portion. The battery housing (20) may include a conductive metal. The battery housing (20) may be electrically connected to a second electrode of the electrode assembly (10).

[0047] The battery terminal (30) may be configured to be electrically connected to the electrode assembly (10) through a closing portion provided on the opposite side of the opening portion of the battery housing (20). The battery terminal (30) may be electrically connected, for example, to a first electrode of the electrode assembly (10). In this case, the battery terminal (30) may function as a first terminal of the battery (1). The battery terminal (30) and the battery housing (20) may have opposite polarities, and in this case, a first sealing member (G1) may be provided between the battery housing (20) and the battery terminal (30) to prevent contact between these components and to secure sealing of the 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 a current collector (40) on the inside of the battery housing (20). The first portion (31) may be provided at a position corresponding to the winding center 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 at the center of the closed portion of the battery housing (20).

[0049] The above battery terminal (30) may include a third portion (33) provided on the outside of the first portion (31). The third portion (33) may be riveted toward the closing portion of the battery housing (20) to secure the battery terminal (30) to the battery housing (20).

[0050] The above current collector (40) may be configured to electrically connect the battery terminal (30) and the electrode assembly (10). The current collector (40) may be electrically connected to the first electrode of the electrode assembly (10).

[0051] An insulator (IS) may be interposed between the inner surface of the closed portion of the battery housing (20) and the current collector (40) to prevent contact between the battery housing (20) and the current collector (40) having opposite polarities.

[0052] The current collector (40) may be placed on the first surface of the electrode assembly (10). Referring to FIGS. 2 and 3, the current collector (40) may include a first coupling portion (41), a second coupling portion (42), and a bridge portion (43).

[0053] The first coupling portion (41) may be configured to be electrically coupled to the electrode assembly (10). The first coupling portion (41) may be coupled to the first uncoated portion (11) of the electrode assembly (10). The first coupling portion (41) may be coupled to a coupling surface formed by bending the first uncoated portion (11). At least a portion of the first coupling portion (41) may 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.

[0054] The second connecting portion (42) can be electrically connected to the first portion (31) of the battery terminal (30). The second connecting portion (42) can be welded to the first portion (31) of the battery terminal (30) by a welding tool inserted through the winding center hole (10a) of the electrode assembly (10) or by a laser irradiated through the winding center hole (10a).

[0055] The above bridge portion (43) may be configured to electrically connect the first coupling portion (41) and the second coupling portion (42). A plurality of the first coupling portions (41) may be provided along the circumference of the battery (1). In this case, a plurality of the bridge portions (43) may also be provided.

[0056] In particular, referring to FIGS. 2 and 3, the bridge portion (43) may be configured such that at least a portion of the area adjacent to the second coupling portion (42) has a reduced cross-sectional area. In particular, as shown in FIG. 4, the portion of the bridge portion (43) where the cross-sectional area is reduced may be broken when an overcurrent exceeding a reference value occurs in the battery (1).

[0057] According to the above-described embodiment of the present invention, when the battery (1) malfunctions, the current collector (40) can be short-circuited without ignition by fusing itself. In addition, when an overcurrent occurs in the battery (1), the current collector (40) itself can be rapidly ruptured, thereby quickly blocking the overcurrent. As a result, the safety of the battery (1) can be ensured.

[0058] In particular, the portion where the cross-sectional area of ​​the bridge portion (43) is reduced may be provided approximately at the portion where the second connecting portion (42) and the bridge portion (43) are connected. More specifically, the bridge portion (43) may include a first region (A1) and a second region (A2). The first region (A1) may be an area adjacent to the second connecting portion (42). The first region (A1) may be an area connected to the second connecting portion (42). In addition, the first region (A1) may be configured to be ruptured when an overcurrent exceeding a reference value occurs in the battery (1).

[0059] The second region (A2) may be provided at a predetermined distance from the first region (A1) in a direction away from the second joint (42). That is, the first region (A1) may be provided radially further inward than the second region (A2).

[0060] According to the above-described embodiment of the present invention, the first region (A1) that is ruptured when an overcurrent occurs in the battery (1) is provided at the connection portion between the second connecting portion (42) of the current collector (40) and the bridge portion (43), thereby partially increasing the resistance on the path of the large current entering through the battery terminal (30) or leaving from the battery terminal (30), thereby more effectively inducing the rupture of the current collector (40).

[0061] In addition, the width of the first region (A1) may be configured to be smaller than the width of the second region (A2). The first region (A1) may refer to a portion where the cross-sectional area of ​​the bridge portion (43) is reduced. Accordingly, when an overcurrent occurs in the battery (1), the first region (A1) having a relatively small cross-sectional area is rapidly ruptured, thereby quickly blocking the overcurrent.

[0062]

[0063] Next, with further reference to FIGS. 5 and 6, a preferred location of the first region (A1) of the present invention will be described. FIG. 5 is a drawing showing a temperature distribution according to the location of a current collector (first current collector) included in a battery according to one embodiment of the present invention, and FIG. 6 is a temperature graph according to the location of the current collector (first current collector) of FIG. 5.

[0064] When an overcurrent occurs in the battery (1), heat may move radially from the center of the second connecting portion (42) to the outside, for example, the bridge portion (43). At this time, referring to FIGS. 5 and 6, the temperature of the region adjacent to the second connecting portion (42) in the bridge portion (43) (the region indicated by T1 in FIG. 5) may be the highest at approximately 650°C or higher. In particular, the temperature of the portion where the second connecting portion (42) and the bridge portion (43) are connected may be the highest.

[0065] Accordingly, the first region (A1) may be positioned closer to the inside than the outside along the radial direction of the current collector (40). For example, as in the embodiments illustrated in FIGS. 2 and 3, the distance (d) from the center of the second coupling portion (42) to the first region (A1) of the bridge portion (43) may be configured to be 0.5 times or less of the radius (R) of the current collector (40).

[0066] According to the above-described embodiment of the present invention, when an abnormal situation occurs in the battery (1), the part where the second connecting portion (42), which is the part where the heat is most concentrated in the current collector (40), and the bridge portion (43) are connected may be broken. As a result, the electrical connection of the battery (1) can be quickly cut off, thereby ensuring the safety of use of the battery (1).

[0067]

[0068] Next, referring again to FIGS. 2 and 3, various embodiments of the bridge portion (43) of the current collector (40) of the present invention will be described.

[0069] The bridge portion (43) may include a portion whose width (w) decreases as it moves toward the second connecting portion (42). As an example, as in the embodiment illustrated in FIG. 2, the bridge portion (43) may be configured such that the width (w) gradually decreases as it moves from the second region (A2) toward the first region (A1). That is, the bridge portion (43) may be configured in a trapezoidal shape.

[0070] At this time, the width of the first region (A1) may be approximately 0.5 mm to 6.0 mm. Alternatively, the width of the first region (A1) may be approximately 1 mm to 4 mm. Alternatively, the width of the first region (A1) may be approximately 2 mm to 4 mm. Alternatively, the width of the first region (A1) may be approximately 1.5 mm to 3.5 mm. Alternatively, the width of the first region (A1) may be approximately 1.5 mm to 2 mm.

[0071] Additionally, the width of the second region (A2) may be approximately 0.5 mm to 6.0 mm. Alternatively, the width of the second region (A2) may be approximately 2 mm to 5.5 mm. Alternatively, the width of the second region (A2) may be approximately 2.5 mm to 5 mm. Alternatively, the width of the second region (A2) may be approximately 3 mm to 4.5 mm.

[0072]

[0073] In another embodiment, as in the embodiment illustrated in FIG. 3, the first region (A1) may include a notch portion (N). The notch portion (N) may be formed on at least one side in the width direction of the bridge portion (43). The notch portion (N) may be configured in the form of a groove recessed on at least one side in the width direction of the bridge portion (43) at a portion where the bridge portion (43) and the second connecting portion (42) are connected. For example, as illustrated in FIG. 3, the notch portions (N) may be formed to face each other on both sides in the width direction of the bridge portion (43).

[0074] The notch (N) may be formed, for example, in a roughly round shape. The notch (N) may be formed, for example, in a roughly semicircular shape. However, the shape of the notch (N) is not limited to the exemplary shapes described above, and any other shape that can reduce the cross-sectional area of ​​the current path and thereby increase resistance is possible.

[0075] The notch portion (N) may be formed in an area adjacent to the second connecting portion (42) as described above. By forming the notch portion (N), the width of the first area (A1) may be made smaller than the width of the second area (A2). According to the above-described embodiment of the present invention, when an overcurrent exceeding a reference value occurs in the battery (1), a rupture of the current collector (40) may be induced in the area between the notch portions (N). As a result, the overcurrent can be quickly blocked.

[0076] Additionally, in the area from the second area (A2) to the notch portion (N), the width (w) of the bridge portion (43) may be configured to be constant. For example, the width (w) of the bridge portion (43) at this time may be approximately 3 mm.

[0077]

[0078] Referring to FIGS. 2 and 3, the current collector (40) may be positioned such that the first coupling portion (41) and the second coupling portion (42) described above are spaced apart from each other along the radial direction of the electrode assembly (10). That is, an empty space may be formed between the first coupling portion (41) and the second coupling portion (42) along the radial direction.

[0079] In particular, the current collector (40) may have a slit line (44). The slit line (44) may be formed by penetrating the current collector (40). That is, the slit line (44) may be formed by penetrating the current collector (40) in a roughly circular plate shape having a roughly flat shape. A first coupling portion (41), a second coupling portion (42), and a bridge portion (43) of the current collector (40) may be formed by the slit line (44). In this case, the first coupling portion (41) and the second coupling portion (42) may be spaced apart from each other in the radial direction by the slit line (44). In addition, the first coupling portion (41) and the bridge portion (43) may be spaced apart from each other in the circumferential direction by the slit line (44).

[0080] In this case, when a structure is applied in which each component of the current collector (40) is distinguished by a slit line (44), a complex process for forming each component, i.e., the first coupling portion (41), the second coupling portion (42), and the bridge portion (43), is not required, and the current collector (40) can be manufactured relatively easily by simply forming a cut line on a metal plate.

[0081] Furthermore, when forming the slit line (44), notching for forming the trapezoidal shape of the bridge portion (43) illustrated in FIG. 2 or the notch portion (N) of the bridge portion (43) illustrated in FIG. 3 can also be performed. This simplifies the manufacturing process of the current collector (40), thereby improving productivity and processability when manufacturing the battery (1).

[0082] In addition, the current collector (40) may have a rim portion (45) positioned on the outer periphery of the first coupling portion (41) and the second coupling portion (42). In this case, the bridge portion (43) may be configured to connect the rim portion (45) and the second coupling portion (42). In addition, in this case, the second area (A2) may refer to a portion where the bridge portion (43) and the rim portion (45) are connected.

[0083] In the case where the first coupling portion (41) and the second coupling portion (42) are not directly connected to each other but are indirectly connected via the rim portion (45) as in the above-described embodiment of the present invention, the impact applied to the battery (1) can be dispersed. That is, the impact applied to the weld portion of the first coupling portion (41) can be minimized from being transferred to the weld portion of the second coupling portion (42), and the impact applied to the weld portion of the second coupling portion (42) can also be minimized from being transferred to the first coupling portion (41).

[0084]

[0085] FIG. 7 is a drawing showing the structure of a lower portion of a battery according to one embodiment of the present invention.

[0086] Referring to FIG. 7, a battery (1) according to one embodiment of the present invention may include a current collector (second current collector) (50). The current collector (50) may be configured to electrically connect an electrode assembly (10) and a battery housing (20). The current collector (50) may be electrically connected to a second electrode of the electrode assembly (10). The current collector (50) may be electrically coupled to a second non-conductive portion (12) provided on a second surface of the electrode assembly (10). The current collector (50) may be electrically coupled to an inner surface of the battery housing (20). The current collector (50) may be electrically coupled to a beading portion (21) formed by press-fitting an outer peripheral surface of the battery housing (20).

[0087] The battery (1) may include a cap (60). The cap (60) may be configured to close an opening of the battery housing (20). The cap (60) may be secured by a crimping portion (22) configured to extend and bend from a beading portion (21) of the battery housing (20) and wrap around an edge of the cap (60). A sealing member (second sealing member) (G2) may be interposed between the cap (60) and an inner surface of the battery housing (20). The cap (60) may include a venting portion (61) configured to be weaker compared to the remaining area. The venting portion (61) may be configured to partially reduce the thickness of the cap (60). The venting portion (61) may be configured to be ruptured when the internal pressure of the battery (1) increases to a predetermined pressure or higher.

[0088]

[0089] FIG. 8 is a drawing showing a battery pack according to one embodiment of the present invention.

[0090] Referring to FIG. 8, a battery pack (3) according to an embodiment of the present invention may include a battery (1) according to an embodiment of the present invention and a pack housing (2) accommodating the battery (1). A plurality of batteries (1) may be provided, and the plurality of batteries (1) may be electrically connected to each other. The battery (1) of the present invention may be configured such that the battery terminal (30) and the closing 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) within the pack housing (2), electrical connection can be made at the upper portion of the battery (1) by arranging the terminals (30) of all the batteries (1) so that they face upward.

[0091]

[0092] FIG. 9 is a drawing showing a vehicle according to one embodiment of the present invention.

[0093] Referring to FIG. 9, a vehicle (5) according to one embodiment of the present invention may include a battery pack (3) according to one embodiment of the present invention. The vehicle (5) may be configured to operate by receiving power from the battery pack (3). The vehicle (5) may be, for example, an electric vehicle or a hybrid vehicle.

[0094]

[0095] As described above, the present invention has been described with reference to the attached drawings, focusing on preferred embodiments. However, it will be apparent to those skilled in the art that numerous obvious modifications can be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be construed as encompassing such numerous modifications by the appended claims.

Claims

1. Electrode assembly; A battery housing configured to receive the electrode assembly through an opening formed on one side; A battery terminal configured to be electrically connected to the electrode assembly through a closing portion provided on the opposite side of the opening portion of the battery housing; and A battery characterized by including a current collector having a first coupling portion configured to be electrically coupled with the electrode assembly, a second coupling portion configured to be electrically coupled with the battery terminal, and a bridge portion configured to electrically connect between the first coupling portion and the second coupling portion, wherein at least a portion of an area adjacent to the second coupling portion is configured to have a reduced cross-sectional area.

2. In paragraph 1, The above bridge part A first region configured to be connected to the second connecting portion, A battery characterized in that it includes a second region provided at a predetermined interval in a direction away from the second coupling portion in the first region.

3. In paragraph 2, A battery characterized in that the width of the first region is configured to be smaller than the width of the second region.

4. In paragraph 2, A battery characterized in that the distance from the center of the second connecting portion to the first region is configured to be 0.5 times or less of the radius of the current collector.

5. In paragraph 2, A battery characterized in that the bridge portion is configured such that the width gradually decreases from the second region toward the first region.

6. In paragraph 2, The above first area is A battery characterized by including a notch portion formed on at least one side in the width direction of the bridge portion.

7. In paragraph 6, A battery characterized in that, in the area from the second area to the notch area, the width of the bridge area is configured to be constant.

8. In paragraph 1, A battery, characterized in that the first coupling portion and the second coupling portion are positioned spaced apart from each other along the radial direction of the electrode assembly.

9. In paragraph 8, A battery characterized in that the above-mentioned collector has a slit line configured to mutually separate the first coupling portion and the second coupling portion.

10. In paragraph 8, The above-mentioned collector has a rim portion positioned on the outer periphery of the first coupling portion and the second coupling portion, A battery characterized in that the bridge portion is configured to connect the rim portion and the second connecting portion.

11. A battery pack comprising a battery according to any one of claims 1 to 10.

12. A vehicle characterized by including a battery according to any one of claims 1 to 10.

Images