Battery, battery pack comprising battery, and vehicle comprising battery pack

Abstract

A battery according to one embodiment of the present invention may comprise: an electrode assembly having an electrode tab in which a vulnerable part is formed; a battery housing configured to accommodate the electrode assembly through an opening part formed on one side of the battery housing; a current collector including a tab coupling part electrically coupled to the electrode tab and a housing coupling part electrically coupled to the battery housing; and a cap configured to cover the opening part.

Description

A battery, a battery pack including the battery, and a vehicle including the battery pack

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

[0002] This application claims priority to Korean Patent Application No. 10-2023-0114002, filed on August 29, 2023, and all contents disclosed in the specification and drawings of the said application are incorporated by reference into this application.

[0003] 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.

[0004] 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.

[0005] Therefore, in the case of the above-mentioned devices, they can only operate and block overcurrent after overheating has already created a safety hazard, and cannot immediately block overcurrent when a cause that could cause a temperature increase occurs. Even if the internal pressure increases due to an abnormal rise in temperature within the secondary battery, if the overcurrent blocking is not performed at an appropriate time, safety issues such as fire or explosion may occur.

[0006] 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. That is, in the case of automobile battery packs, a high c-rate is required, and accordingly, the amount of heat generated is bound to be high. However, devices such as PTC thermistors (positive temperature coefficient thermistors), TCOs (thermal cut-outs), and thermal fuses have the problem of operating too early when placed in such high-temperature environments.

[0007] Therefore, a secondary battery is needed that can be used in an environment where high current flows, and that 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.

[0008] The present invention was created in consideration of the above-described problems, and its primary purpose is to provide a battery having a structure capable of quickly and reliably blocking the current path of the battery in response to abnormal behavior such as an increase in internal pressure and / or a rise in temperature due to an abnormal occurrence in the battery.

[0009] 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.

[0010] According to one embodiment of the present invention for solving the above-described problem, a battery may include: an electrode assembly having an electrode tab having a vulnerable portion formed therein; a battery housing configured to receive the electrode assembly through an opening formed on one side; a current collector including a tab coupling portion electrically coupled to the electrode tab and a housing coupling portion electrically coupled to the battery housing; and a cap configured to cover the opening portion.

[0011] The above-mentioned vulnerable portion may be configured to partially reduce the cross-sectional area of ​​the electrode tab.

[0012] The electrode assembly may have a structure in which a laminate including a first electrode having a first non-conductive portion, a second electrode having a second non-conductive portion, and a separator interposed between the first electrode and the second electrode is wound.

[0013] The above electrode tab may be the first non-conductive portion.

[0014] The above first non-conductive portion may include a plurality of segments divided along the winding direction of the electrode assembly.

[0015] The plurality of segments may be bent along the radial direction of the electrode assembly and joined to the tab joint.

[0016] The above battery housing may have a beading portion having a structure in which the outer circumference is pressed inward.

[0017] The above housing joint can be joined to the beading joint.

[0018] The above-mentioned vulnerable portion may be provided in at least some of the plurality of segments.

[0019] The electrode tab may include a first region located on the end side of the electrode tab with respect to the vulnerable portion; and a second region located on the opposite side of the first region with respect to the vulnerable portion.

[0020] The connection between the electrode tab and the current collector may be made through the first region. The second region may not be connected to the current collector.

[0021] The above cap may have a venting portion configured to rupture as the internal pressure of the battery increases.

[0022] The battery may include a pressing member disposed between the current collector and the electrode assembly, configured to cause a shape deformation toward the core of the electrode assembly as the internal temperature of the battery increases to press the vulnerable portion.

[0023] A battery pack according to one embodiment of the present invention for solving the above-described problem includes a battery according to one embodiment of the present invention.

[0024] According to one embodiment of the present invention, a vehicle for solving the above-described problem includes a battery pack according to one embodiment of the present invention.

[0025] According to one aspect of the present invention, the current path of a battery can be quickly and reliably blocked in response to abnormal behavior such as an increase in internal pressure and / or a rise in temperature due to an abnormal occurrence in the battery.

[0026] 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.

[0027] 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.

[0028] FIG. 1 is a drawing showing the structure of an upper portion of a battery according to one embodiment of the present invention.

[0029] FIG. 2 is a drawing for explaining the shape deformation of the current collector that occurs as the internal pressure increases in the battery illustrated in FIG. 1.

[0030] Figures 3 to 7 are drawings showing various embodiments of a vulnerable portion formed in an electrode tab of the present invention.

[0031] Figures 4 to 7 are drawings showing various examples of deformation of the vulnerable part illustrated in Figure 3.

[0032] Figure 8 is a drawing showing electrodes constituting the electrode assembly of the present invention.

[0033] FIG. 9 and FIG. 10 are drawings showing a structure in which an electrode tab and a current collector of the present invention are combined.

[0034] Figures 11 and 12 are drawings showing the pressurizing member of the present invention.

[0035] FIG. 13 is a drawing showing the structure of a lower portion of a battery according to one embodiment of the present invention.

[0036] FIG. 14 is a drawing showing a battery pack according to one embodiment of the present invention.

[0037] FIG. 15 is a drawing showing a vehicle according to one embodiment of the present invention.

[0038] 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.

[0039]

[0040] First, a battery (1) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is a drawing showing the structure of an upper portion of a battery according to an embodiment of the present invention, FIG. 2 is a drawing for explaining shape deformation of a current collector that occurs as internal pressure increases in the battery shown in FIG. 1, and FIGS. 3 to 7 are drawings showing various embodiments of a vulnerable portion formed in an electrode tab of the present invention.

[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 current collector (30), and a cap (40). The battery (1) of the present invention may be, for example, a cylindrical battery.

[0042] The electrode assembly (10) may be provided with an electrode tab (first electrode tab) (11) having a vulnerable portion (B) formed therein. The battery housing (20) may be configured to accommodate the electrode assembly (10) through an opening formed on one side. The current collector (30) may include a tab coupling portion (31) electrically coupled to the electrode tab (11) and a housing coupling portion (32) electrically coupled to the battery housing (20). The cap (40) may be configured to cover the opening of the battery housing (20).

[0043] According to this configuration of the present invention, when force is applied to the joint portion between the electrode assembly (10) and the current collector (30), a break may occur at the weak portion (B) formed in the electrode tab (11). In this way, when a break occurs in the electrode tab (11), the flow of current within the battery (1) may be blocked.

[0044] When an abnormality occurs in the above battery (1) and the internal temperature rises and / or the internal pressure increases, the cap (40) may break at the open side of the battery housing (20) and / or the sealing structure at the joint between the cap (40) and the housing (20) may collapse. Accordingly, the core portion of the electrode assembly (10) may rise toward the open side of the battery housing (20), and the current collector (30) electrically connected to the electrode assembly (10) may also receive an upward force. At this time, when a break occurs at the vulnerable portion (B) of the electrode tab (11), the electrical connection between the current collector (30) and the electrode assembly (10) may be released, thereby preventing the spread of a thermal event.

[0045] The above-mentioned vulnerable portion (B) may be configured to partially reduce the cross-sectional area of ​​the electrode tab (11). When the cross-sectional area of ​​the electrode tab (11) is partially reduced by the above-mentioned vulnerable portion (B), the fracture of the electrode tab (11) due to an increase in resistance in the area where the vulnerable portion (B) is formed may be accelerated. Even when the internal temperature increase due to the abnormality of the battery (1) alone is not sufficient to form a temperature for the fracture of the electrode tab (11), the fracture of the electrode tab (11) may occur more quickly due to the heat generated by the increase in resistance due to the reduction in the cross-sectional area at the vulnerable portion (B).

[0046] Referring to FIGS. 3 to 7, the vulnerable portion (B) formed in the electrode tab (11) can be applied without limitation as long as it has a shape that can partially reduce the cross-sectional area of ​​the electrode tab (11) between the two ends in the extension direction of the electrode tab (11). The vulnerable portion (B) may have a structure that is notched inward from both sides of the electrode tab (11), for example, as illustrated in FIG. 3. Alternatively, the vulnerable portion (B) may have a structure that is notched inward from one side of the electrode tab (11), for example, as illustrated in FIG. 4. In addition, the vulnerable portion (B) may be formed by a hole, such as an approximately circular or rectangular hole, penetrating the electrode tab (11), as illustrated in FIGS. 5 and 6. In addition, referring to FIG. 7, the vulnerable portion (B) may be formed by a fracture line in the form of a dotted line extending from one side of the electrode tab (11) to the other side.

[0047]

[0048] Next, with reference to FIG. 8 along with FIG. 1 and FIG. 2, the relationship between the electrode tab (11) and the electrode assembly (10) of the present invention will be described in detail. FIG. 8 is a drawing showing electrodes constituting the electrode assembly of the present invention.

[0049] Referring to FIG. 8 together with FIG. 1 and FIG. 2, the electrode tab (11) may be a part of an electrode assembly (10). The electrode assembly (10) may have a structure in which a laminate including a first electrode (100) having a first non-coated portion (11), a second electrode (not shown) having a second non-coated portion (12) (see FIG. 13), and a separator (not shown) interposed between the first electrode and the second electrode is wound. The first electrode may be an anode or a cathode, and the second electrode may be an electrode having an opposite polarity to the first electrode.

[0050] As illustrated in Fig. 8, the first electrode (100) may include a first holding portion (110), which is a region where an electrode active material is applied, and a first non-conductive portion (120), which is a region where an electrode active material is not applied. The non-conductive portion (120) may be an electrode tab (11) of the present invention.

[0051] Meanwhile, the first non-conductive portion (120) may include a plurality of segments (F) divided along the winding direction of the electrode assembly (10). The plurality of segments (F) may be formed by notching the first non-conductive portion (120) to a predetermined depth. The weak portion (B) may be provided on at least some of the plurality of segments (F).

[0052] Referring to FIGS. 9 and 10 along with FIGS. 1 and 2, the bonding structure between the electrode tab (11) and the current collector (30) of the present invention will be described. FIGS. 9 and 10 are drawings showing the structure in which the electrode tab and the current collector of the present invention are bonded.

[0053] Referring to FIGS. 9 and 10 along with FIGS. 1 and 2, the electrode tab (11), i.e., the plurality of segments (F) (see FIG. 8), can be bent along the radial direction of the electrode assembly (10) toward or in the opposite direction to the winding center hole (10a) and joined to the tab joint (31) of the current collector (30).

[0054] The electrode tab (11) may include a first region (11a) located on the end side of the electrode tab (11) with respect to the vulnerable portion (B) and a second region (11b) located on the opposite side of the first region (11a) with respect to the vulnerable portion (B). The connection between the electrode tab (11) and the current collector (30) may be made through the first region (11a), and the second region (11b) may not be connected to the current collector (30).

[0055] In this way, when the first region (11a) is coupled to the current collector (30) and the second region (11b) is not coupled to the current collector (30), tension may be applied to the vulnerable portion (B) of the electrode tab (11) when the current collector (30) rises upward due to a thermal event occurring inside the battery (1). If both the first region (11a) and the second region (11b) are coupled to the current collector (30), even if the current collector (30) rises upward, sufficient tension may not be applied to the vulnerable portion (B), and thus, rapid current interruption due to breakage of the electrode tab (11) may be difficult.

[0056] Meanwhile, when the bending of the electrode tab (11) is performed within the second region (11b) as illustrated in FIG. 9, not only the first region (11a) of the electrode tab (11) but also the second region (11b) may partially face the tab joint portion (31) of the current collector (30). In this case, a joint by welding may not be formed in the region where the tab joint portion (31) of the current collector (30) and the second region (11b) of the electrode tab (11) face each other. This is to ensure that sufficient tension is applied to the vulnerable portion (B) when the current collector (30) is raised, as described above.

[0057] On the other hand, when the bending of the electrode tab (11) is performed within the first region (11a) as illustrated in FIG. 10, a joint by welding can be formed over the entire region where the tab joint (31) of the current collector (30) of the electrode tab (11) faces.

[0058]

[0059] Next, the pressing member (50) of the present invention will be described with reference to FIGS. 11 and 12 along with FIGS. 1 to 3. FIGS. 11 and 12 are drawings showing the pressing member of the present invention.

[0060] Referring to FIGS. 11 to 12 along with FIGS. 1 to 3, the battery (1) of the present invention may include a pressing member (50). The pressing member (50) may be positioned between the current collector (30) and the electrode assembly (10). The pressing member (50) may be configured to cause a shape deformation toward the core of the electrode assembly (10) as the internal temperature of the battery (1) rises, thereby pressing the vulnerable portion (B) of the electrode tab (11).

[0061] The above-mentioned pressure member (50) may be connected to the current collector (30). The above-mentioned pressure member (50) may be connected to the tab joint (31) of the current collector (30). The above-mentioned pressure member (50) and the current collector (30) may be formed integrally. The above-mentioned pressure member (50) may include a connecting portion (51) connected to the current collector (30) and a pressing portion (52) connected to the connecting portion (51). The above-mentioned connecting portions (51) may be provided in multiple numbers.

[0062] The above-mentioned connecting portion (51) and / or pressurizing portion (52) may undergo shape deformation due to a temperature increase caused by a thermal event. Due to the shape deformation of the connecting portion (51) and / or pressurizing portion (52), the pressurizing portion (52) may pressurize the vulnerable portion (B) of the electrode tab (11).

[0063] The above-mentioned pressurizing portion (52) may be approximately a rim shape that extends continuously along the circumference of the electrode assembly (10) as illustrated in FIG. 11. In this case, the connecting portion (51) may be configured to connect the rim and the current collector (30). The pressurizing portion (52) may include a shape memory alloy configured to have its inner diameter reduced when a predetermined temperature or higher is reached. In this case, the pressurizing portion (52) may be deformed in such a way that its diameter is reduced as the temperature rises due to a thermal event, thereby applying force to the vulnerable portion (B) by the pressurizing portion (52) to cause fracture more quickly.

[0064] The above-mentioned pressurizing portion (52) may have a shape that extends discontinuously along the circumferential direction of the electrode assembly (10) as illustrated in FIG. 12. In this case, the connecting portion (51) may include a bi-metal. The connecting portion (51) may include a first portion that is positioned relatively close to the direction toward the core of the electrode assembly (10) and includes a metal having a first thermal expansion coefficient, and a second portion that is positioned relatively far from the core of the electrode assembly (10) and includes a metal having a second thermal expansion coefficient greater than the first thermal expansion coefficient. When the above-mentioned connecting portion (51) is configured in this manner, when the internal temperature of the battery (1) rises, the end of the connecting portion (51) can be bent so as to come closer in the direction toward the core of the electrode assembly (10) due to the difference in thermal expansion coefficients between the first metal and the second metal, and accordingly, the pressing portion (52) connected to the end of the connecting portion (51) can press the vulnerable portion (B) of the electrode tab (11).

[0065]

[0066] Referring again to FIGS. 1 and 2, the battery housing (20) may include a conductive metal. The battery housing (20) may have a beading portion (21) having a structure in which the outer circumference is pressed inward. The beading portion (21) may be formed above the electrode assembly (10). The diameter of the internal space of the battery housing (20) in the area where the beading portion (21) is formed may be reduced, thereby preventing the electrode assembly (10) from being separated from the outside of the battery housing (20).

[0067] The battery housing (20) may be provided with a crimping portion (22) having a bent shape extending from the upper end of the beading portion (21) and wrapping around the edge of the cap (40). The crimping portion (22) may be configured to secure the cap (40). A sealing member (G1) may be interposed between the inner surface of the battery housing (20) and the cap (40) in the area where the crimping portion (22) is formed.

[0068] The housing coupling portion (32) of the above-described collector (30) can be electrically coupled to the inner surface of the battery housing (20). The housing coupling portion (32) can be electrically coupled to the beading portion (21) of the battery housing (20). The housing coupling portion (32) can be interposed between the beading portion (21) and the sealing member (G1).

[0069] The cap (40) may have a venting portion (40a) configured to have weaker rigidity compared to the remaining area of ​​the cap (40). The venting portion (40a) may be configured, for example, to partially reduce the thickness of the cap (40). The venting portion (40a) may be formed, for example, by notching one or both sides of the cap (40). The venting portion (40a) may be configured to break when the internal pressure of the battery (1) reaches a preset pressure. When a break occurs in the venting portion (40a) due to an increase in the internal pressure of the battery (1), the pressure may be released through the broken area, and at this time, an upward force may be applied to the core area of ​​the electrode assembly (10) and the current collector (30). In this case, when an upward force is applied to the current collector (30), a break may occur at the weak point (B) formed in the electrode tab (11) of the present invention described above, thereby blocking the current within the battery (1) and preventing the spread of a thermal event.

[0070]

[0071] Next, with reference to FIG. 13, the lower portion structure of a battery (1) according to one embodiment of the present invention will be described. FIG. 13 is a drawing showing the lower portion structure of a battery according to one embodiment of the present invention.

[0072] Referring to Fig. 13, the battery (1) may include a terminal (60) electrically connected to the electrode assembly (10). The terminal (60) may have an opposite polarity to the battery housing (20). In the present invention, the battery housing (20) may be electrically connected to a first electrode of the electrode assembly (10), and the terminal (60) may be electrically connected to a second electrode of the electrode assembly (10). The terminal (60) may be electrically connected to the electrode assembly (10) through a closing portion formed on the opposite side of the opening portion of the battery housing (20). A portion of the terminal (60) may be positioned on the outside of the battery housing (20). A sealing member (second sealing member) (G2) may be interposed between the terminal (60) and the battery housing (20) to prevent contact between components having different polarities and to seal the battery (1).

[0073] The above battery (1) may include a current collector (second current collector) (P) configured to electrically connect between the electrode assembly (10) and the terminal (60). The current collector (P) may be electrically coupled to a second electrode tab (12) of the electrode assembly (10). The second electrode tab (12) may correspond to a second uncoated portion of the electrode assembly (10). The second uncoated portion may include a plurality of segments similar to the first uncoated portion described above, and these plurality of segments may be bent and coupled to the current collector (P).

[0074] The above battery (1) may include an insulator (IS) interposed between the electrode assembly (10) and the inner surface of the closure of the battery housing (20) or between the current collector (P) and the inner surface of the closure of the battery housing (20).

[0075]

[0076] Next, a battery pack (3) according to one embodiment of the present invention will be described with reference to FIG. 14. FIG. 14 is a drawing showing a battery pack according to one embodiment of the present invention.

[0077] Referring to FIG. 14 together with FIG. 1 and FIG. 13, 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 terminal (60) and the closing portion of the 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 (60) of all the batteries (1) so that they face upward.

[0078] Next, with reference to Fig. 15, a vehicle (5) according to one embodiment of the present invention will be described. Fig. 15 is a drawing showing a vehicle according to one embodiment of the present invention.

[0079] Referring to FIG. 15, 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.

[0080]

[0081] 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.

[0082] [Explanation of symbols]

[0083] 1: Battery

[0084] 2: Pack housing

[0085] 3: Battery pack

[0086] 5: Car

[0087] 10: Electrode assembly

[0088] 10a: Winding center hole

[0089] 11: Electrode tab (1st electrode tab)

[0090] F: Segment

[0091] B: Vulnerable area

[0092] 12: Electrode tab (second electrode tab)

[0093] 100: Electrode (first electrode)

[0094] 110: Maintenance Department

[0095] 120: Ministry of Immigration

[0096] 20: Battery housing

[0097] 21: Bidding Department

[0098] 22: Crimping section

[0099] 30: Whole house (1st whole house)

[0100] 31: Tab joint

[0101] 32: Housing joint

[0102] 40: Cap

[0103] 40a: Venting section

[0104] G1: Sealing member (first sealing member)

[0105] 50: Pressurized member

[0106] 51: Connection

[0107] 52: Pressurized section

[0108] 60: Terminal

[0109] G2: Sealing member (second sealing member)

[0110] P: Whole house (second whole house)

[0111] IS: Insulator

Claims

1. An electrode assembly having an electrode tab having a vulnerable portion formed thereon; A battery housing configured to accommodate the electrode assembly through an opening formed on one side; A current collector including a tab joint electrically coupled to the electrode tab and a housing joint electrically coupled to the battery housing; and A cap configured to cover the above opening; A battery containing .

2. In paragraph 1, The above vulnerable areas are: A battery characterized in that it is configured to partially reduce the cross-sectional area of ​​the electrode tab.

3. In paragraph 1, The above electrode assembly, A battery characterized by having a structure in which a laminate including a first electrode having a first non-conductive portion, a second electrode having a second non-conductive portion, and a separator interposed between the first electrode and the second electrode is wound.

4. In paragraph 3, A battery characterized in that the above electrode tab is the first non-conductive portion.

5. In paragraph 4, The above first part is, A battery characterized by including a plurality of segments divided along the winding direction of the electrode assembly.

6. In paragraph 5, The above multiple segments are, A battery characterized in that the electrode assembly is bent along the radial direction and is joined to the tab joint.

7. In paragraph 1, The above battery housing, A battery characterized by having a beading portion having a structure in which the outer circumference is pressed inward.

8. In paragraph 7, The above housing joint is, A battery characterized in that it is coupled to the above beading portion.

9. In paragraph 5, The above vulnerable areas are: A battery characterized in that at least some of the above plurality of segments are provided.

10. In paragraph 1, The above electrode tab is, A first region located on the end side of the electrode tab based on the above-mentioned vulnerable part; and A battery characterized by including a second region located on the opposite side of the first region based on the above-mentioned vulnerable part.

11. In paragraph 10, A battery characterized in that the connection between the electrode tab and the current collector is made through the first region, and the second region is not connected to the current collector.

12. In paragraph 1, The above cap is, A battery characterized by having a venting portion configured to rupture as the internal pressure of the battery increases.

13. In paragraph 1, The above battery, A battery characterized by including a pressing member disposed between the current collector and the electrode assembly and configured to cause a shape deformation toward the core of the electrode assembly as the internal temperature of the battery rises to press the vulnerable part.

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

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

Images