Battery cell, battery pack, and vehicle comprising the same

Abstract

A battery cell according to the present application includes: an electrode assembly provided by winding a first electrode and a second electrode around a winding center hole in a state in which a separator is interposed between the first electrode and the second electrode; a can case accommodating the electrode assembly and having a closed portion provided at one side thereof; a first current collector electrically connected to the first electrode; an electrode terminal coupled to the first current collector and disposed through the closed portion; and an insulator provided between the closed portion and the first current collector and configured to electrically insulate the can case and the first current collector from each other, wherein the insulator includes: a current collector contact portion configured to contact the first current collector; and at least one variable bridge elongated in one direction from the current collector contact portion and configured to be elastically compressed and deformed by being pressed by the closed portion and the electrode assembly.

Description

Technical Field

[0001] This disclosure relates to battery cells and battery packs and vehicles including the battery packs, and more specifically, to a battery cell and battery pack capable of effective tolerance management and simultaneously improving structural stability, and a vehicle including the battery packs.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2025-0011673, filed with the Korean Intellectual Property Office on January 24, 2025, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] In recent years, the demand for portable electronic products such as laptops, cameras, and mobile phones has increased rapidly, and the development of related technologies such as electric vehicles, energy storage batteries, robots, and satellites has also accelerated. Therefore, active research is underway on high-performance rechargeable and rechargeable batteries.

[0004] Currently, commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among them, lithium-ion batteries have attracted much attention due to their advantages over nickel-based batteries, such as virtually no memory effect allowing for free charging and discharging, very low self-discharge rate, and high energy density.

[0005] These lithium-ion secondary batteries typically use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively. Furthermore, a lithium-ion secondary battery includes: an electrode assembly in which positive and negative electrode plates, respectively coated with positive and negative electrode active materials, are arranged, and a separator is located between the positive and negative electrode plates; and a housing that sealably stores the electrode assembly and electrolyte.

[0006] Furthermore, based on the shape of the battery casing, lithium-ion secondary batteries can be classified into pouch-type secondary batteries, in which the electrode components are housed in a bag of aluminum laminates, and can-type secondary batteries, in which the electrode components are housed in a metal can. Additionally, based on the shape of the metal can, can-type secondary batteries can be further classified into cylindrical batteries and prismatic batteries. Lithium-ion secondary batteries are used as battery modules or battery packs, which are obtained by overlapping or stacking multiple battery cells into a dense structure and then electrically connecting them to provide high voltage and high current.

[0007] Such a battery cell may include: an electrode assembly provided in a wound state in which electrodes and a separator inserted between the electrodes are wound together; a positive current collector electrically connected to the electrode assembly; a can housing housing the electrode assembly; an insulator inserted between the positive current collector and the can housing to electrically insulate them from each other; and electrode terminals coupled to the positive current collector and disposed within the can housing. Furthermore, conventional battery cells may include a rolled edge portion and a crimped portion. The rolled edge portion is formed to be recessed at the side of the opening of the can housing to fix the electrode assembly and adjust the shape factor of the battery cell, and the crimped portion is a portion that is bent and extended to seal the opening.

[0008] Meanwhile, in recent years, in order to improve space efficiency, energy density, and productivity, battery cells (hereinafter referred to as conventional battery cells) that do not include parts such as crimped sections and press-fit sections have been developed. Such conventional battery cells may include components such as can caps that are attached to the end of the can housing opening.

[0009] In conventional battery cells, the electrode terminals can be configured such that at least a portion of them protrude toward the positive current collector, for example, in the form of rivets. To ensure complete connection of these electrode terminals to the positive current collector, tolerance management is required, ensuring that the thickness of the insulator equals the protrusion height of the electrode terminal. However, in the case of such conventional battery cells, tolerance management is difficult, and structural stability may deteriorate due to ineffective securing of the electrode components. Summary of the Invention

[0010] Technical issues

[0011] This disclosure was designed to address the problems existing in the prior art, and therefore aims to provide a battery cell and battery pack that allow for effective tolerance management and improve structural stability, as well as a vehicle including the battery pack.

[0012] The technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description of the invention that other problems not mentioned above will also be addressed.

[0013] Technical solution

[0014] In one aspect of this disclosure, a battery cell is provided, the battery cell comprising: an electrode assembly formed by winding the first electrode and the second electrode around a winding central hole with a diaphragm inserted between the first electrode and the second electrode; a can housing configured to receive the electrode assembly and having a closure on one side; a first current collector electrically connected to the first electrode; an electrode terminal coupled to the first current collector and disposed through the closure; and an insulator disposed between the closure and the first current collector and configured to electrically insulate the can housing and the first current collector from each other, wherein the insulator comprises: a current collector contact portion configured to contact the first current collector; and at least one variable bridge extending elongated in one direction from the current collector contact portion and configured to be elastically compressed and deformed by being pressed by the closure and the electrode assembly.

[0015] The can housing may include an opening on the other side, and the battery cell may also include a can lid, which is welded to the opening to cover it.

[0016] The insulator may also include a terminal through-hole through which the electrode terminal passes.

[0017] The variable bridge can be formed by slitting from the inner diameter of the terminal through hole and then bending upward toward the terminal through hole.

[0018] The variable bridge can be configured such that, when compressed to the maximum extent, the inner end of the variable bridge is spaced apart from the electrode terminal.

[0019] The variable bridge may include a closure contact portion at its distal end in its extension direction, configured to contact the closure portion, and the closure contact portion may be formed to be at least partially flat.

[0020] The closed contact portion may include at least one extension portion extending in the circumferential direction.

[0021] The insulator may include a plurality of the variable bridges.

[0022] The insulator may include three variable bridges.

[0023] The plurality of variable bridges can be configured to be radially rotationally symmetric.

[0024] The thickness of the variable bridge can be less than the thickness of the collector plate contact portion.

[0025] The insulator may further include a recess that is recessed toward the first current collector at the boundary between the lower surface of the current collector contact portion and the variable bridge.

[0026] The variable bridge can be configured to be spaced apart from the contact portion of the manifold by a predetermined gap when it is compressed to the maximum extent.

[0027] In another aspect of this disclosure, a battery pack is provided, the battery pack including at least one battery cell according to this disclosure.

[0028] In another aspect of this disclosure, a vehicle is provided that includes at least one battery pack according to this disclosure.

[0029] Beneficial effects

[0030] According to this disclosure, battery cells, battery packs, and vehicles including the battery packs can be provided that allow for effective tolerance management.

[0031] According to one aspect of this disclosure, a battery cell, a battery pack, and a vehicle including the battery pack can be provided, the overall height of the insulator being easily adjustable.

[0032] According to one aspect of this disclosure, battery cells, battery packs, and vehicles including the battery packs can be provided with improved structural stability.

[0033] According to one aspect of this disclosure, battery cells with improved weldability, battery packs, and vehicles including the battery packs can be provided.

[0034] According to one aspect of this disclosure, a battery cell, a battery pack, and a vehicle including the battery pack can be provided that can effectively fix electrode assemblies.

[0035] According to one aspect of this disclosure, battery cells, battery packs, and vehicles including the battery packs can be provided with improved design flexibility.

[0036] According to one aspect of this disclosure, a battery cell, a battery pack, and a vehicle including the battery pack can be provided that can effectively mitigate external shocks and vibrations.

[0037] According to one aspect of this disclosure, battery cells with improved energy density, battery packs, and vehicles including the battery packs can be provided.

[0038] According to one aspect of this disclosure, battery cells, battery packs, and vehicles including the battery packs can be provided with improved productivity.

[0039] The effects that can be obtained from this disclosure are not limited to those described above, and other effects not mentioned above will be clearly understood by those skilled in the art based on the description of the invention below. Attached Figure Description

[0040] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0041] Figure 1 This is a perspective view showing the overall configuration of a battery cell according to an embodiment of the present disclosure.

[0042] Figure 2 This is a side cross-sectional view showing a battery cell according to an embodiment of the present disclosure.

[0043] Figure 3 It is shown Figure 2 Enlarged side view cross section of region A1.

[0044] Figure 4 It is shown Figure 2 Enlarged side view cross section of region A2.

[0045] Figure 5 This is a perspective view showing the overall configuration of an insulator according to an embodiment of the present disclosure.

[0046] Figure 6 This is a plan view showing the overall configuration of the insulator according to an embodiment of the present disclosure.

[0047] Figure 7 This is a partially enlarged side cross-sectional view showing an insulator according to an embodiment of the present disclosure.

[0048] Figure 8 It is shown Figure 7 A side cross-sectional view of an insulator in a compressed state.

[0049] Figure 9 This is a plan view showing the state in which the insulator is compressed to the maximum extent according to an embodiment of the present disclosure.

[0050] Figure 10 This is a perspective view showing the overall configuration of an insulator according to another embodiment of the present disclosure.

[0051] Figure 11 This is a partially enlarged side cross-sectional view showing an insulator according to yet another embodiment of the present disclosure.

[0052] Figure 12 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0053] Figure 13 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0054] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but should be interpreted based on the principle that allows the inventors to appropriately define terms for best interpretation, and based on the meanings and concepts corresponding to the technical aspects of this disclosure.

[0055] Therefore, the descriptions presented herein are merely preferred examples for illustrative purposes and are not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made to these examples without departing from the scope of this disclosure.

[0056] In this specification, unless otherwise stated, the X-axis and Y-axis directions may correspond to the left-right and front-back directions, or the front-back and left-right directions, respectively, and the Z-axis direction, which is perpendicular to the XY plane, may correspond to the up-down direction (vertical direction).

[0057] Figure 1 This is a perspective view showing the overall configuration of a battery cell according to an embodiment of the present disclosure. Figure 2 This is a side cross-sectional view showing a battery cell according to an embodiment of the present disclosure, and Figure 3 It is shown Figure 2 Enlarged side view cross section of region A1.

[0058] Reference Figures 1 to 3 According to this disclosure, the battery cell may include an electrode assembly, a can housing, a first current collector, electrode terminals, and an insulator.

[0059] The electrode assembly 10 may have electrodes 11 and a diaphragm 12. Electrodes 11 may include electrodes with different polarities. Specifically, electrodes 11 may include a first electrode 11a and a second electrode 11b. The first electrode 11a may have a first polarity, and the second electrode 11b may have a second polarity opposite to the first polarity. For example, the first polarity may be positive, and the second polarity may be negative. The diaphragm 12 may be inserted between the electrodes 11 with different polarities. The diaphragm 12 may be inserted between the first electrode 11a and the second electrode 11b. The diaphragm 12 may be an insulator.

[0060] The electrode assembly 10 may have a core structure. That is, the electrode assembly 10 can be manufactured by winding a stacked body around the central axis of the winding central hole C, the stacked body being formed by stacking a sheet-like first electrode 11a and a sheet-like second electrode 11b at least once with a diaphragm 12 inserted between the first electrode 11a and the second electrode 11b. Any core structure known in the art can be applied to this disclosure without limitation.

[0061] The can housing 20 can accommodate the electrode assembly 10. The can housing 20 can be configured as, for example, a cylindrical shape with an empty interior to accommodate the electrode assembly 10. A closure 21 can be provided on one side of the can housing 20 (e.g., the +Z direction side or the upper side). An opening 22 can be formed on the other side of the can housing 20 (e.g., the -Z direction side or the lower side).

[0062] The first current collector 30 can be electrically connected to the electrode assembly 10. The first current collector 30 can be electrically connected to the first electrode 11a. The first current collector 30 can have a first polarity. The first current collector 30 can be configured as a positive current collector. The first current collector 30 can be disposed at the upper end of the electrode assembly 10.

[0063] Electrode terminal 40 can be connected to first current collector 30. First current collector 30 can be electrically connected to first electrode 11a to have a first polarity and can be configured as, for example, a positive terminal. Electrode terminal 40 can be configured to pass through the closure 21 of can housing 20.

[0064] The electrode terminal 40 may be configured such that at least a portion of it protrudes inward and downward toward the first current collector 30. The lower end of the electrode terminal 40 may be soldered to the first current collector 30. Another portion of the electrode terminal 40 may be exposed outward and upward from the closure 21. The electrode terminal 40 may be provided in the form of a rivet.

[0065] An insulator 50 may be disposed between the closure 21 and the first manifold 30. The insulator 50 can physically space the closure 21 and the first manifold 30 from each other. The insulator 50 may be configured to electrically insulate the tank housing 20 and the first manifold 30 from each other. The insulator 50 may include an insulating material.

[0066] Meanwhile, the insulator 50 can be configured to allow electrical connection between the electrode terminal 40 and the first current collector 30.

[0067] Figure 4 It is shown Figure 2 Enlarged side view of region A2, Figure 5 This is a perspective view showing the overall configuration of the insulator according to an embodiment of the present disclosure. Figure 6 This is a plan view showing the overall configuration of the insulator according to an embodiment of the present disclosure. Figure 7This is a partially enlarged side cross-sectional view showing an insulator according to an embodiment of the present disclosure, and Figure 8 It is shown Figure 7 A side cross-sectional view of an insulator in a compressed state.

[0068] In the following text, reference will be made to Figures 4 to 8 A detailed description of battery cell 1 according to an embodiment of the present disclosure is provided.

[0069] The insulator 50 may include a current collector contact 51 and a variable bridge 52.

[0070] The collector plate contact portion 51 may be a portion configured to contact the first collector plate 30. For example, the lower surface of the collector plate contact portion 51 may contact the upper surface of the first collector plate 30.

[0071] The variable bridge 52 can extend from the manifold contact portion 51 in one direction. For example, the variable bridge 52 can extend from the manifold contact portion 51 in an upwardly inclined direction.

[0072] The variable bridge 52 can be elastically compressed and deformed by compression. The variable bridge 52 can be elastically compressed and deformed by compression from the closure portion 21 and the electrode assembly 10. The variable bridge 52 can be compressed and deformed in the vertical direction (Z-axis direction). The height of the variable bridge 52 can be defined as the distance from the lower end to the upper end of the variable bridge 52 in the Z-axis direction. When the height of the variable bridge 52 in the initial state is h1 (see... Figure 7 When the variable bridge 52 is in a compressed state, its height can be formed as h2, which is less than h1 (see...). Figure 8 Since the variable bridge 52 can elastically deform, under compression, the elastic restoring force can act towards the closure 21 and the first collector plate 30. At least one variable bridge 52 can be provided.

[0073] In the battery cell 1 according to an embodiment of the present disclosure, the insulator 50 includes the aforementioned variable bridge 52, making the overall height of the insulator 50 easily adjustable. Therefore, it becomes easy to adjust the overall height of the insulator 50 to be equal to the protrusion height of the portion of the electrode terminal 40 protruding toward the first current collector 30, thereby achieving effective tolerance management of the insulator 50. For example, when assembling the electrode assembly 10 with a lower limit overall height, the shape of the variable bridge 52 can be maintained, and when assembling the electrode assembly 10 with an upper limit overall height, the variable bridge 52 can be compressed, thereby effectively accommodating the tolerances of the overall height of the components of the battery cell 1 and the electrode assembly 10, and effectively reducing tolerances in the overall height direction.

[0074] Furthermore, since the electrode terminal 40 can be firmly and tightly contacted with the first current collector 30, the weldability between the electrode terminal 40 and the first current collector 30 can be improved.

[0075] Furthermore, in the battery cell 1 according to the embodiments of this disclosure, the variable bridge 52 in the compressed state can stably support the electrode assembly 10 through elastic restoring force, thereby improving the structural stability of the battery cell 1. In addition, the electrode assembly 10 can be effectively fixed by the elastic restoring force of the variable bridge 52.

[0076] Furthermore, in the battery cell 1 according to the embodiments of the present disclosure, since the variable bridge 52 is arranged to extend long in one direction, the stiffness of the variable bridge 52 can be easily adjusted by adjusting the length of the variable bridge 52, thereby improving the design flexibility of the battery cell 1.

[0077] Furthermore, in the battery cell 1 according to the embodiments of the present disclosure, external shocks or vibrations can be effectively mitigated by the elastically deformable variable bridge 52.

[0078] Simultaneously, an insulating washer G can be disposed between the electrode terminal 40 and the closure portion 21. The insulating washer G can be configured to surround the electrode terminal 40. The insulating washer G may include insulating material and can be configured to electrically insulate the electrode terminal 40 and the closure portion 21 from each other.

[0079] Refer again Figure 2 and Figure 3 The battery cell 1 according to the embodiments of the present disclosure may further include a can lid 70.

[0080] The lid 70 can cover the opening 22 of the can body 20. The lid 70 can be welded to the opening 22. The edge of the lid 70 can be welded and attached to the end of the can body 20 that forms the opening 22.

[0081] When the battery cell 1 according to the embodiment of the present disclosure also includes the can cap 70 as described above, the can housing 20 may not include a configuration such as a conventional rolled edge. Since the battery cell 1 according to the embodiment of the present disclosure includes the insulator 50 described above, the electrode assembly 10 can be effectively fixed without including a configuration such as a conventional rolled edge.

[0082] Furthermore, when the battery cell 1 according to the embodiments of this disclosure does not include configurations such as conventional crimping and pressing portions, the internal space of the battery cell 1 can be further ensured, thereby increasing energy density. In addition, since a separate crimping or pressing process is not required, the productivity of the battery cell 1 can be improved.

[0083] Simultaneously, the battery cell 1 may also include a second current collector 60. The second current collector 60 may be electrically connected to the second electrode 11b and may be a negative current collector. The second current collector 60 may be welded to the lower end of the electrode assembly 10. A can lid 70 may cover the second current collector 60. The battery cell 1 may be configured such that the can lid 70 performs the function of the second current collector 60 without including the second current collector 60. In this case, the can lid 70 may be welded to the second electrode 11b.

[0084] At this time, if the electrode assembly 10 is set to an improperly fixed state, the welding may not be performed correctly when the second current collector 60 or the can cover 70 is welded to the electrode assembly 10, and the possibility of damage at the corresponding welded portion may increase. However, in the battery cell 1 according to the embodiment of this disclosure, even in this case, since the electrode assembly 10 is effectively fixed, the welding quality between the second current collector 60 or the can cover 70 and the electrode assembly 10 can be reliably ensured.

[0085] Simultaneously, the can lid 70 may include at least one of a plug 71, an edge portion 72, and a venting cutout portion 73. A hole opening toward the winding central hole C may be formed at approximately the center portion of the can lid 70 for electrolyte injection, and the plug 71 may be configured to seal the hole. The edge portion 72 may be configured to facilitate engagement at the edge of the can lid 70 with the end of the can housing 20 near the opening 22, and may, for example, be configured to have a U-shaped cross-section. The venting cutout portion 73 may be configured to rupture when high temperatures and / or high pressures are generated in the battery cell 1 to release venting gas inside the battery cell 1, and may be formed, for example, by a slit process.

[0086] Refer again Figures 4 to 6 The insulator 50 may also include a terminal through-hole 53. The terminal through-hole 53 may be configured to allow an electrode terminal 40 to pass through it. The electrode terminal 40 may pass through the terminal through-hole 53 and be connected to the first current collector 30.

[0087] Terminal through-hole 53 may be formed in the region of insulator 50 corresponding to electrode terminal 40. Terminal through-hole 53 may be formed at approximately the center portion of insulator 50. The inner diameter of terminal through-hole 53 may be formed to allow electrode terminal 40 to pass through.

[0088] When the insulator 50 is configured as described above, electrical connection between the electrode terminal 40 and the first current collector 30 can be reliably permitted.

[0089] The variable bridge 52 can be formed by slitting and then bending. Specifically, after first forming the terminal through-hole 53 in the insulator 50, the variable bridge 52 can be formed by performing a slit process from the inner diameter of the terminal through-hole 53 and then bending it upward toward the terminal through-hole 53.

[0090] In this case, since the variable bridge 52 can be manufactured by a simple process, the productivity of the battery cell 1 can be improved.

[0091] The variable bridge 52 may include a closed contact portion 54. The closed contact portion 54 may be provided at the distal end in the extending direction of the variable bridge 52. For example, when viewed along the Z-axis direction, the closed contact portion 54 may be provided at the end of the variable bridge 52 near the terminal through hole 53.

[0092] The contact portion 54 of the closed portion can be formed to be at least partially flat. Therefore, the contact portion 54 of the closed portion can contact the surface of the closed portion 21.

[0093] When the variable bridge 52 is configured as described above, a contact area of ​​a predetermined size can be formed between the variable bridge 52 and the contact portion 54 of the closed portion, thereby supporting the closed portion 21 more stably and improving the structural stability of the battery cell 1.

[0094] The insulator 50 may include multiple variable bridges 52. In this case, the insulator 50 can more stably support the enclosure 21, thereby improving the structural stability of the battery cell 1.

[0095] The insulator 50 may include three variable bridges 52. In this case, the three variable bridges 52 can form a plane, so that the insulator 50 can more stably support the closure 21, thereby improving the structural stability of the battery cell 1.

[0096] When the insulator 50 includes multiple variable bridges 52, the multiple variable bridges 52 can be configured to be radially rotationally symmetrical. In this case, the insulator 50 can support the closure portion 21 more uniformly, thereby improving the structural stability of the battery cell 1.

[0097] Figure 9 This is a plan view showing the state in which the insulator is compressed to the maximum extent according to an embodiment of the present disclosure.

[0098] refer to Figure 9 When the variable bridge 52 is compressed to its maximum extent, the inner end of the variable bridge 52 can be configured to be spaced apart from the electrode terminal 40. In this case, when the variable bridge 52 is compressed to its maximum extent, the variable bridge 52 can be deformed to be parallel to the current collector contact portion 51.

[0099] When the variable bridge 52 is compressed to the maximum extent, the inner end of the variable bridge 52 may not extend inward beyond the inner diameter of the terminal through hole 53.

[0100] When the variable bridge 52 is configured as described above, interference between the variable bridge 52 and the electrode terminal 40 can be effectively prevented.

[0101] The variable bridge 52 can be configured such that when it is compressed to the maximum extent, it is spaced apart from the collector plate contact portion 51 by a predetermined gap Ga. Here, the gap Ga can be understood as being formed on both sides in the circumferential direction of the variable bridge 52.

[0102] If the variable bridge 52 is configured as described above, interference between the variable bridge 52 and the collector plate contact portion 51 can be effectively prevented when the variable bridge 52 is compressed and deformed.

[0103] Figure 10 This is a perspective view showing the overall configuration of an insulator according to another embodiment of the present disclosure.

[0104] In the following text, reference will be made to Figure 10 A battery cell 1 according to another embodiment of the present disclosure is described in detail. The battery cell 1 according to another embodiment of the present disclosure can be configured such that the variable bridge 52 includes the aforementioned closed contact portion 54, and the closed contact portion 54 may include at least one extension portion 55.

[0105] The extension portion 55 may extend in the circumferential direction. The extension portion 55 may be provided on at least one of the two circumferential sides of the closed portion contact portion 54.

[0106] The extension portion 55 and the closing portion contact portion 54 can form a continuous surface. For example, the upper surface of the extension portion 55 and the upper surface of the closing portion contact portion 54 can be integrally formed with each other.

[0107] When the variable bridge 52 is configured as described above, the sealing portion 21 can be supported more stably because the contact area between the sealing portion 21 and the sealing portion contact portion 54 is further ensured, thereby further improving the structural stability of the battery cell 1.

[0108] Refer again Figure 7 According to the embodiments of the present disclosure, the thickness t2 of the variable bridge 52 can be formed to be thinner than the thickness t1 of the collector plate contact portion 51.

[0109] When the variable bridge 52 is configured as described above, it can be deformed more easily. Simultaneously, the insulator 50 can easily adjust the degree of deformation of the variable bridge 52 by adjusting its thickness t2.

[0110] Figure 11 This is a partially enlarged side cross-sectional view showing an insulator according to yet another embodiment of the present disclosure.

[0111] In the following text, reference will be made to Figure 11 A battery cell 1 according to another embodiment of the present disclosure is described in detail. In the battery cell 1 according to another embodiment of the present invention, the insulator 50 may further include a recess R.

[0112] The recess R can be provided at the boundary between the collector plate contact portion 51 and the variable bridge 52. The recess R can be provided at the boundary between the lower surface of the collector plate contact portion 51 and the variable bridge 52. The recess R can be recessed toward the first collector plate 30. The recess R can be formed into a circular recessed shape.

[0113] If the insulator 50 is configured as described above, when the variable bridge 52 is compressed and deformed, the boundary portion between the lower surface of the current collector contact portion 51 and the variable bridge 52 can be effectively prevented from deforming and protruding toward the first current collector 30.

[0114] Figure 12 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0115] refer to Figure 12 The battery pack 3 according to this disclosure may include at least one battery cell 1 according to this disclosure. The battery pack 3 may include a battery pack housing 2 that houses at least one battery cell 1.

[0116] In the accompanying drawings, for ease of illustration, components such as the busbar electrical connectors, cooling unit, and external terminals of the battery cell 1 are omitted. The structure of the battery cell 1 used in manufacturing the battery pack 3 has been previously described by example.

[0117] Additionally, although not shown, the battery pack 3 according to this disclosure may also include various devices for controlling the charging and discharging of the battery cells 1, such as a BMS (Battery Management System), a current sensor, and a fuse.

[0118] Figure 13 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure.

[0119] Reference Figure 13 The battery pack 3 according to embodiments of the present disclosure can be applied to a vehicle 4, such as an electric vehicle or a hybrid electric vehicle. That is, a vehicle 4 according to the present disclosure may include the battery pack 3 according to the present disclosure. The battery pack 3 may be installed in the vehicle body frame under the vehicle seats or in the trunk space. In addition to the battery pack 3, a vehicle 4 according to the present disclosure may also include various other components included in the vehicle 4. For example, in addition to the battery pack 3 according to the present disclosure, a vehicle 4 according to embodiments of the present disclosure may also include a body, a motor, and control devices such as an ECU (electronic control unit).

[0120] Furthermore, it should be understood that, in addition to vehicle 4, the battery pack 3 according to this disclosure can be installed in other devices, equipment and facilities, such as energy storage systems utilizing secondary batteries.

[0121] At the same time, although terms indicating direction such as "up", "down", "right", "left", "front" and "back" are used in this specification, it will be obvious to those skilled in the art that these terms are only for the convenience of interpretation with reference to the relevant drawings and can vary depending on the position of the target object or the position of the observer.

[0122] This disclosure has been described in detail. However, it should be understood that while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art from the detailed description.

[0123] [Figure Labels]

[0124] 1: Battery cells

[0125] 2: Battery pack casing

[0126] 3: Battery pack

[0127] 4: Vehicles

[0128] 10: Electrode assembly

[0129] 11: Electrode

[0130] 11a: First electrode

[0131] 11b: Second electrode

[0132] 12: Diaphragm

[0133] 20: Tank shell

[0134] 21: Enclosed section

[0135] 22: Opening

[0136] 30: First manifold

[0137] 40: Electrode terminal

[0138] 50: Insulator

[0139] 51: Collector plate contact part

[0140] 52: Variable Bridge

[0141] 53: Terminal through hole

[0142] 54: Contact area of ​​the enclosed part

[0143] 55: Extension Section

[0144] 60: Second manifold

[0145] 70: Can lid

[0146] 71: Sai

[0147] 72: Edge

[0148] 73: Exhaust cut

[0149] C: Center hole of winding

[0150] G: Insulating gasket

[0151] Ga: Gap

[0152] R: Recessed part

Claims

1. A battery cell, the battery cell comprising: An electrode assembly is constructed by winding the first electrode and the second electrode around a winding center hole while a diaphragm is inserted between the first electrode and the second electrode. A can housing configured to house the electrode assembly and having a closure on one side; The first current collector is electrically connected to the first electrode; Electrode terminals, which are connected to the first current collector and are configured to pass through the enclosure; as well as An insulator disposed between the closure and the first manifold and configured to electrically insulate the tank housing and the first manifold from each other. The insulator includes: A collector plate contact portion, the collector plate contact portion being configured to contact the first collector plate; and At least one variable bridge extends elongated in one direction from the current collector contact portion and is configured to be elastically compressed and deformed by being pressed by the closure portion and the electrode assembly.

2. The battery cell according to claim 1, in, The tank shell includes an opening on the other side, and The battery cell also includes a can lid, which is welded to the opening to cover the opening.

3. The battery cell according to claim 1, in, The insulator also includes a terminal through-hole through which the electrode terminal passes.

4. The battery cell according to claim 3, in, The variable bridge is formed by slitting from the inner diameter of the terminal through hole and then bending upward toward the terminal through hole.

5. The battery cell according to claim 3, in, The variable bridge is configured such that, when compressed to the maximum extent, the inner end of the variable bridge is spaced apart from the electrode terminal.

6. The battery cell according to claim 1, in, The variable bridge includes, at its distal end in its extension direction, a closure contact portion configured to contact the closure portion, and The contact portion of the closure is formed to be at least partially flat.

7. The battery cell according to claim 6, in, The closed contact portion includes at least one extension portion that extends in the circumferential direction.

8. The battery cell according to claim 1, in, The insulator includes a plurality of the variable bridges.

9. The battery cell according to claim 8, in, The insulator includes three variable bridges.

10. The battery cell according to claim 8, in, The plurality of variable bridges are configured to be radially rotationally symmetric.

11. The battery cell according to claim 1, in, The thickness of the variable bridge is less than the thickness of the contact portion of the manifold.

12. The battery cell according to claim 11, in, The insulator further includes a recess that is recessed toward the first current collector at the boundary between the lower surface of the current collector contact portion and the variable bridge.

13. The battery cell according to claim 1, in, The variable bridge is configured to be spaced apart from the contact portion of the manifold by a predetermined gap when it is compressed to the maximum extent.

14. A battery pack comprising at least one battery cell according to any one of claims 1 to 13.

15. A vehicle comprising at least one battery pack according to any one of claims 1 to 14.

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