Battery cell and vehicle having same
By using connecting elements in the battery cells to limit end plate bulging and releasing gas under high internal pressure, the mechanical failures and safety issues caused by increased internal pressure in cylindrical battery cells are solved, thus improving the stability and safety of the battery pack.
Patent Information
- Application Number
- CN202480064497.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-10-09
- Filing Date
- 2024-09-12
- Publication Date
- 2026-05-05
AI Technical Summary
Cylindrical battery cells bulge due to increased internal pressure during high charging, affecting the mechanical stability and safety of the battery pack, especially when using new electrolytes or active materials with high silicon and germanium content.
The design includes a housing, end plates, and connecting elements. The connecting elements limit the bulging of the end plates, and the electrode windings are fixed to the end plates by welding or adhesive bonding. This ensures that the battery cells do not detach from the terminals under high internal pressure and release gas through predetermined break points when necessary.
It effectively prevents or reduces end plate bulging, lowers the risk of busbar detachment, improves the safety and mechanical stability of individual battery cells, and ensures the integrity of the battery pack.
Smart Images
Figure CN121986404A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a battery cell, particularly a cylindrical battery cell, and a vehicle having the battery cell. Background Technology
[0002] For example, battery cells used to power vehicle electric motors to drive vehicles are typically hermetically sealed to protect them from environmental factors, particularly water and oxygen. Inside this battery cell casing, there is usually a higher internal pressure than the surrounding environment. During operation, this internal pressure increases due to (parasitic) side reactions between the electrolyte and the cathode and anode active materials, especially when the cell is in a high-charge state. This can cause the cells to bulge, affecting the integrity of the battery pack (which contains multiple interconnected cells in a container) and the adhesion of the individual cells to the bottom of the container via adhesives.
[0003] This bulging must be compensated for in the battery pack by allocating space to allow the individual cells to bulge or be compressed externally, so as to keep the cell size within a predetermined maximum range. In prismatic cells, for example, a spacer is provided between the cell and the pressure plate (pull rod), which keeps the cell size within the predetermined maximum range. In cylindrical cells, this bulging is largely limited to the longitudinal direction, i.e., the axial direction of the housing, and the bulging of the substantially flat end plate, because the external dimensions of the cylindrical housing component (whose axial end is closed by the end plate) can be roughly maintained even when the internal pressure increases.
[0004] The larger the diameter of a cylindrical battery cell, the more difficult it is to limit the bulging of the end plate, because according to the formula "force = pressure × area", the force F acting on the plate increases linearly with the area.
[0005] Furthermore, most cylindrical battery cells have contact points on one of the end plates (outer side), which causes the busbars abutting the cell terminals or poles to bear additional mechanical loads and introduces integration problems for cells with high internal pressure. Since cylindrical battery cells have venting devices on at least one of the end plates, if these venting devices are conventionally designed with predetermined break points to allow gas and / or debris to escape from the cell for safety reasons (e.g., in the event of a thermal event within the cell causing increased internal pressure), this presents additional challenges to the integration process. Because these cells must be integrated into the battery pack, longitudinal bulges can lead to mechanical failures or affect the safety and integrity of the battery pack.
[0006] This can be particularly challenging for battery cells with novel electrolytes (such as liquid gas electrolytes) or with high silicon-germanium content or other less stable active materials, which typically have higher gas pressures than battery cells with standard electrolytes or standard active materials. Summary of the Invention
[0007] The objective of this invention is to provide an improved battery cell.
[0008] This task is solved by the features of claim 1. Other preferred embodiments of the invention are the technical solutions of the dependent claims.
[0009] According to a first aspect of the present invention, a battery cell according to one embodiment comprises:
[0010] - A housing comprising a tubular (in some embodiments hollow cylindrical, in some embodiments conductive) housing component, a first end plate (in some embodiments having a circular outer periphery and a first central section located in the central region of the first end plate) and a second end plate (in some embodiments having a circular outer periphery and a second central section located in the central region of the second end plate), a first end of the housing component being closed by the first end plate and a second end of the housing component being closed by the second end plate (airtightly).
[0011] - An electrode winding body housed within a housing, the electrode winding body comprising a strip-shaped first electrode (in some embodiments having a first active material, such as a cathode active material, and having a first current collector, such as a cathode current collector) and a strip-shaped second electrode (in some embodiments having a second active material, such as an anode active material, and having a second current collector, such as an anode current collector), the first and second electrodes being arranged in layers and wound around the longitudinal axis of the battery cell with first and second separators sandwiched therebetween; and
[0012] - At least one connecting element configured to restrict movement of a first central section away from the interior of the housing in the longitudinal axis direction and to restrict movement of a second central section away from the interior of the housing in the longitudinal axis direction, in some embodiments to prevent or at least restrict corresponding bulges in the first and second end plates, the bulges being particularly based on overpressures existing inside the housing relative to the exterior of the housing.
[0013] Therefore, in some embodiments, bulging of the battery cell housing in the first or second end plate region can be prevented or at least limited, thereby reducing the risk of the busbar for contacting the battery cell terminals detaching from the battery cell terminals and improving the safety of the battery cell. Furthermore, this prevents the adhesion of the battery cell to the bottom of the battery pack, for example, by means of adhesive, from being affected by bulging in the corresponding end plate region.
[0014] Here, the electrode winding, especially the first and second separators, can be impregnated with liquid electrolyte or the first and second separators can contain solid electrolyte or be made of solid electrolyte.
[0015] The preferred embodiments and extensions of the present invention are described below. Unless explicitly excluded, they can be combined with each other arbitrarily.
[0016] In some embodiments, the first current collector is electrically connected to the first (electrical) terminal or first pole of the battery cell via a first contact element that is at least partially disc-shaped and conductive in some embodiments. In some embodiments, the first contact element, a protrusion of the first contact element extending along the longitudinal axis toward the first end plate, and the first terminal are connected by welding between the protrusion of the first contact element and the first central section in some embodiments. The second current collector is electrically connected to the second (electrical) terminal or pole of the battery cell via a second contact element that is at least partially disc-shaped and conductive in some embodiments.
[0017] In some embodiments, the uncoated cathode or anode active material of the first or second electrode (in some embodiments, the first or second current collector) protruding in the axial direction or in the opposite direction is welded to the first or second contact element.
[0018] In addition, in some embodiments, the first contact element is disposed between the first end plate and the electrode winding body, while the second contact element is disposed between the second end plate and the electrode winding body.
[0019] In some embodiments, the at least one connecting element has a hollow or solid rod, which in some embodiments is non-conductive, extending along a longitudinal axis, wherein a first axial end of the rod is connected to a first central section, particularly through a connection between the first axial end of the rod and a first contact element, and a second axial end of the rod is connected to a second central section.
[0020] The rod described herein may, for example, be made of plastic. Alternatively, the rod may also have a metal core with an electrically insulating material disposed on its circumferential surface, if the second central plate, described later, is electrically insulated from the housing. Furthermore, the rod may, for example, be connected to the first contact element or the first central section and / or the second central section by means of (corresponding) material locking connections (e.g., in the case of the use of adhesives).
[0021] In some embodiments, the rod extends through a cavity extending along the longitudinal axis of the electrode winding, or in some embodiments, a cavity for a mandrel.
[0022] The electrode winding can be wound around a rod. In some embodiments, the rod can also be inserted into the cavity of the electrode winding afterward or after the electrode winding has been wound.
[0023] In some embodiments, the at least one connecting element has a first pin or first screw and / or a second pin or second screw, the first pin or first screw being connected to a first contact element and / or a first central section in some embodiments by means of a material locking connection (e.g., in the case of using an adhesive), extending into a cavity extending along the longitudinal axis of the electrode winding and force-locked to the inner wall of the cavity or the inner wall of a tube extending in the cavity, which in some embodiments is non-conductive, such as that made of plastic, and the second pin or second screw being connected to a second contact element and / or a second central section in some embodiments by means of a material locking connection (e.g., in the case of using an adhesive), extending into a cavity extending along the longitudinal axis of the electrode winding and force-locked to the inner wall of the cavity or the inner wall of a tube extending in the cavity.
[0024] In some embodiments, the barbed ends of the first and / or second pins may be force-locked to the inner wall of the cavity or the inner wall of a tube extending within the cavity.
[0025] In some embodiments, the first end plate includes a first perforated plate or perforated plate having a first opening (located centrally in some embodiments) and a first central plate (conductive in some embodiments), the first central plate being electrically insulated from the first perforated plate by a first insulator, the first opening being closed (hermetically) by a section of the first central plate and a section of the first insulator, and the first central plate having a first central section.
[0026] In some embodiments, the first perforated plate may be integrally constructed with the housing component.
[0027] Furthermore, in some embodiments, the first terminal of the battery cell may be formed by or have a section of the first central region or the surface of the first central plate facing outwards from the battery cell.
[0028] In some embodiments, the second end plate includes a second (conductive) perforated plate or perforated plate having a second opening (located centrally in some embodiments) and a second central plate (conductive in some embodiments), the second central plate being electrically insulated from the second perforated plate by a second insulator, the second opening being closed (hermetically) by a section of the second central plate and a section of the second insulator, and the second central plate having a second central section.
[0029] In some embodiments, the second contact element has a (conductive) first connection portion that is electrically connected to the inner wall of the housing component in some embodiments by a clamping connection and / or a welding connection, and the housing component is electrically connected to the second terminal.
[0030] In some embodiments, the second terminal of this battery cell may be formed or have a section of the surface of the first perforated plate facing the outside of the battery cell, and the housing component is electrically connected to the first perforated plate.
[0031] In some embodiments, the at least one connecting element has a welded connection between a second contact element, a protrusion of the second contact element extending along the longitudinal axis toward the second end plate in some embodiments, and a second central section, through which the protrusion of the first contact element extending along the longitudinal axis toward the first end plate is connected to the first terminal, the cross-sectional area of the welded connection perpendicular to the longitudinal axis being larger than the inner diameter of the electrode winding body, and in some embodiments larger than the cavity diameter of the electrode winding body.
[0032] Thus, in some embodiments, higher force transmission can be achieved and bulging or protrusion of the battery cell housing in the first or second end plate region can be minimized or at least reduced.
[0033] Here, the first terminal must be welded to the protrusion of the first contact element from the side of the first terminal away from the protrusion of the first contact element, because only a welding surface with a diameter less than or equal to the diameter of the electrode winding body cavity can be produced through the cavity of the electrode winding body.
[0034] In some embodiments, the second end plate includes a second (conductive) perforated plate or perforated plate having a second opening (located centrally in some embodiments) and a second central plate (conductive in some embodiments), the second central plate being electrically insulated from the second perforated plate by a second insulator, the second opening being closed by a section of the second central plate and a section of the second insulator, and the second central section being formed by a section of the second perforated plate surrounding the second central plate.
[0035] In some embodiments, the second end plate is connected to the housing component by laser welding, and in some embodiments, to an inwardly projecting protrusion of the housing component.
[0036] In some embodiments, the second end plate, and in some embodiments the second perforated plate, have a predetermined fracture point.
[0037] Therefore, when the overpressure inside the shell increases significantly, the second end plate can break at a predetermined fracture point, allowing gas and / or debris to escape from the shell.
[0038] The predetermined break point can be constructed in the second end plate, for example, in the form of an annular groove.
[0039] According to a second aspect of the invention, a vehicle, or in some embodiments an electric vehicle or a hybrid vehicle, has the aforementioned battery cell and an electric drive motor for driving the vehicle, the battery cell being configured to supply electrical energy to the electric drive motor to drive the vehicle. Attached Figure Description
[0040] Other advantageous extensions are derived from the following description of the preferred embodiments. The accompanying drawings are as follows:
[0041] Figure 1 A cross-sectional view of a battery cell according to one embodiment is shown, the battery cell being bonded to the bottom by means of an adhesive.
[0042] Figure 2 A cross-sectional view of a battery cell according to another embodiment is shown;
[0043] Figure 3 A cross-sectional view of a battery cell according to another embodiment is shown;
[0044] Figure 4 A partial cross-sectional view of a battery cell according to another embodiment is shown;
[0045] Figure 5 A vehicle according to one embodiment is shown. Detailed Implementation
[0046] Figure 1This diagram shows a cross-sectional view of a battery cell 100 according to one embodiment, which is fixed to, for example, a bottom 300, or in some embodiments, to the bottom of a battery pack (not shown), the battery pack comprising a plurality of battery cells 100 connected in parallel or in series, or a plurality of battery cells 100 connected in parallel or in series. Figures 1 to 5 The battery cells 100, 100A, 100B, and 100C shown are fixed in some embodiments by means of adhesive 301. Here, the bottom 300 may have, for example, a cooling plate for cooling the battery cell 100 or simply be provided to ensure the stable upright position of the battery cell 100.
[0047] The battery cell 100 has a housing 10, which is formed by a tubular (in some embodiments, hollow cylindrical, in some embodiments, conductive) housing component 11, a first end plate 20 or cover plate (in some embodiments, having a circular outer periphery and a first central section 21), and a second end plate 30 or bottom plate (in some embodiments, having a circular outer periphery and a second central section 31). The first axial end of the housing component 11 is closed by the first end plate 20, and the second axial end of the housing component 11 is closed (hermetically) by the second end plate 30.
[0048] An electrode winding body 40 is housed inside the housing 10. The electrode winding body has a strip-shaped first electrode (in some embodiments having a first active material, such as a cathode active material, and having a first current collector 50, such as a cathode current collector) and a strip-shaped second electrode (in some embodiments having a second active material, such as an anode active material, and having a second current collector 60, such as an anode current collector). The first and second electrodes are arranged in layers and wound around the longitudinal axis L of the battery cell 100 with a first separator 70 and a second separator 71 sandwiched therebetween.
[0049] The first end plate 20 includes a first conductive perforated plate 22 with a first opening and a first conductive central plate 23. The first central plate and the first perforated plate 22 are electrically insulated from each other by a first insulator 120. The first opening is closed by a section of the first central plate 23 and a section of the first insulator 120. The first central plate 23 has a first central section 21.
[0050] The second end plate 30 includes a second conductive aperture 32 having a second opening and a second central plate 33, the second central plate being electrically insulated from the second aperture 32 by a second insulator 130. The second opening is closed by a section of the second central plate 33 and a section of the second insulator 130, the second central plate 33 having a second central section 31.
[0051] The second end plate 30 or its second perforated plate 32 is connected to the tubular housing component 11 by means of a connection established by means of a rolled edge, and a third electrical insulator 130 is provided between the second perforated plate 32 and the tubular housing component 11.
[0052] The first current collector 50 or cathode current collector, especially its uncoated cathode active material side strip, is electrically connected to the first terminal 101 of the battery cell 100 via a first contact element 51 that is at least partially disc-shaped. Here, the first contact element 51, especially the protrusion of the first contact element 51 extending along the longitudinal axis L towards the first end plate 20, is connected to the first terminal 101 via a welded connection 81 between the protrusion of the contact element 51 and the first central section 21. Furthermore, the second current collector 60 or anode current collector, especially its uncoated anode active material side strip, is electrically connected to the second terminal 102 of the battery cell 100 via a second contact element 61 that is at least partially disc-shaped.
[0053] The first terminal 101 and the second terminal 102 of each of the multiple battery cells 100, 100A, 100B, and 100C of the battery pack can be connected to the first or second terminal (not shown) of the battery pack via their respective busbars (not shown).
[0054] The second contact element 61 has a (conductive) first connection portion 62 that is electrically connected to the inner wall of the housing component 11 (in some embodiments by clamping and / or welding) and the housing component 11 is electrically connected to the second terminal 102.
[0055] The battery cell 100 also includes at least one connecting element 80, 81, 82, 83, 84, 85, in Figure 1 In the illustrated embodiment, the connecting element is in the form of a hollow, non-conductive rod 80. The connecting element is configured to restrict the movement of the first central section 21 in the longitudinal axis L or along the longitudinal axis L away from the interior of the housing 10 and to restrict the movement of the second central section 31 in the longitudinal axis L or along the longitudinal axis L away from the interior of the housing 10. In some embodiments, this is to prevent or at least restrict the corresponding bulges of the first end plate 20 and the second end plate 30, which in some embodiments are based on overpressure existing inside the housing 10 relative to the outside of the housing 10.
[0056] The rod 80 may, for example, be made of plastic. The rod 80 extends along the longitudinal axis L, wherein a first axial end of the rod 80 is connected to a first central section 21 by a connection of the first axial end of the rod 80 to a first contact element 51 by a preferred material (e.g., in the case of using an adhesive not shown), and a second axial end of the rod 80 is connected to a second central section 31 by a connection of a preferred material (e.g., in the case of using an adhesive not shown).
[0057] The electrode winding 40 can be wound around the rod 80. In some embodiments, the rod 80 may also be inserted into the cavity 41 after the electrode winding 40 has been wound.
[0058] In an embodiment not shown, the rod 80 may also be solid, i.e., made of solid material.
[0059] Figure 2 A cross-sectional view of a battery cell 100A according to another embodiment is shown. Figure 1 The embodiments shown differ, in that at least one connecting element 80, 81, 82, 83, 84, 85 is... Figure 2 The illustrated embodiment includes a first pin 82, which is connected to a first contact element 51 and to a first central section 21 via a connection between the first contact element 51 and a first central plate 23. The first pin 82 extends into a cavity 41 extending along the longitudinal axis L of the electrode winding body 40 and is force-locked to the inner wall of a tube 42 extending in the cavity 41.
[0060] Furthermore, the at least one connecting element 80, 81, 82, 83, 84, 85 has a second pin 83, which is connected to the second central plate 33, and in particular the second central section 31. The second pin 83 extends into the cavity 41 of the electrode winding body 40 extending along the longitudinal axis L and is force-locked to the inner wall of the tube 42 extending in the cavity 41.
[0061] The first pin 82 and / or the second pin 83 may be made of plastic or plastic.
[0062] In embodiments not shown, the first pin 82 may be replaced by a first screw and / or the second pin 83 may be replaced by a second screw.
[0063] Furthermore, in embodiments not shown, tube 42 can be omitted, allowing the first pin 82 or the first screw and / or the second pin 83 or the second screw to extend into the cavity 41 of the electrode winding body 40 and be forcefully locked to the inner wall of the cavity 41.
[0064] Figure 3 A cross-sectional view of a battery cell 100B according to another embodiment is shown. (Compared to...) Figure 1 Or, as shown in embodiment 2, the at least one connecting element 80, 81, 82, 83, 84, 85 is in... Figure 3The illustrated embodiment has a welded connection 84 between the second contact element 61, or in some embodiments, between the protrusion of the second contact element 61 extending along the longitudinal axis L toward the second end plate 30 and the second central section 31, and has a welded connection 81, through which the protrusion of the first contact element 51 extending along the longitudinal axis L toward the first end plate 20 is connected to the first terminal 101, and the cross-sectional area of the welded connection 81 perpendicular to the longitudinal axis L is greater than the inner diameter of the electrode winding body 40 or greater than the diameter of the cavity 41 of the electrode winding body 40.
[0065] Furthermore, here with Figure 1 and 2 In different embodiments, the second end plate 30 is formed of an integral conductive plate, and the radial end of the second end plate 30 is connected to the inwardly protruding protrusion 12 of the tubular housing component 11, which is welded in some embodiments.
[0066] Figure 4 A partial cross-sectional view of a battery cell 100C according to another embodiment is shown. (Compared to...) Figure 1 In a different embodiment as shown in Figure 2, the (conductive) second connecting portion 63, connected to the second contact element 61, is electrically connected to an inner section of the second perforated plate 32 (in some embodiments, this is achieved through a welded connection 85), which is adjacent to the second central plate 33. A fourth electrical insulator 140 is provided between the second connecting portion 63 and the second central plate, and the radial end of the second end plate 30 or the second perforated plate 32 is connected to an inwardly projecting protrusion 12 of the tubular housing component 11.
[0067] Figure 5 A vehicle 200 according to one embodiment is shown. The vehicle 200 (which may be configured as an electric vehicle or a hybrid vehicle) has the aforementioned battery cells 100, 100A, 100B, 100C and an electric drive motor 201 for driving the vehicle 200. The battery cells 100, 100A, 100B, 100C are configured to supply electrical energy to the electric drive motor 201 to drive the vehicle 200.
Claims
1. Battery cells (100, 100A, 100B, 100C), which include: - A housing (10), the housing comprising a tubular, particularly hollow cylindrical housing component (11), a first end plate (20) and a second end plate (30), wherein the first end plate has a circular outer periphery and a first central section (21), and the second end plate has a circular outer periphery and a second central section (31), wherein the first end of the housing component (11) is closed by the first end plate (20) and the second end of the housing component (11) is closed by the second end plate (30); - An electrode winding (40) housed inside a housing (10), the electrode winding having a strip-shaped first electrode with a first current collector (50) and a strip-shaped second electrode with a second current collector (60), the first and second electrodes being arranged in layers and wound around the longitudinal axis (L) of the battery cell (100) with first and second separators (70, 71) sandwiched therebetween; and - At least one connecting element (80, 81, 82, 83, 84) is configured to restrict the movement of the first central section (21) away from the interior of the housing (10) in the longitudinal axis (L) direction and to restrict the movement of the second central section (31) away from the interior of the housing (10) in the longitudinal axis (L) direction, in particular to prevent or at least restrict the corresponding bulges of the first end plate and the second end plate (20, 30), especially the bulges being caused by overpressure existing inside the housing (10) relative to the outside of the housing (10).
2. The battery cell (100, 100A, 100B, 100C) according to claim 1, wherein, The first current collector (50) is electrically connected to the first terminal (101) of the battery cell (100) via a first contact element (51) that is at least partially disc-shaped, wherein the first contact element (51) and the protrusion of the first contact element (51) extending along the longitudinal axis (L) toward the first end plate (20) are connected to the first terminal (101) via a welding connection (81) between the protrusion of the first contact element (51) and the first central section (21), and the second current collector (60) is electrically connected to the second terminal (102) of the battery cell (100) via a second contact element (61) that is at least partially disc-shaped.
3. The battery cell (100) according to claim 1 or 2, wherein, The at least one connecting element (80) has a hollow or solid, especially non-conductive rod (80) extending along a longitudinal axis (L), wherein a first axial end of the rod (80) is connected to a first central section (21) in particular by means of a connection between the first axial end of the rod (80) and a first contact element (51), and a second axial end of the rod (80) is connected to a second central section (31).
4. The battery cell (100) according to claim 3, wherein, The rod (80) extends through a cavity (41) extending along the longitudinal axis (L) of the electrode winding (40).
5. The battery cell (100) according to claim 4, wherein, The electrode winding (40) is wound on the rod (80).
6. The battery cell (100A) according to claim 2, wherein, The at least one connecting element (80, 81, 82, 83, 84) has a first pin (82) or a first screw and / or a second pin (83) or a second screw, the first pin or the first screw being connected to a first contact element (51) and / or a first central section (21), extending into a cavity (41) of the electrode winding body (40) extending along the longitudinal axis (L) and being force-locked to the inner wall of the cavity (41) or the inner wall of a tube (42) extending in the cavity (41), the second pin or the second screw being connected to a second contact element (61) and / or a second central section (31), extending into a cavity (41) of the electrode winding body (40) extending along the longitudinal axis (L) and being force-locked to the inner wall of the cavity (41) or the inner wall of a tube (41) extending in the cavity (42).
7. The battery cell (100, 100A, 100B, 100C) according to any one of the preceding claims, wherein, The first end plate (20) includes a first hole plate (22) having a first opening and a first central plate (23), the first central plate being electrically insulated from the first hole plate (22) by a first insulator (120), the first opening being closed by a section of the first central plate (23) and a section of the first insulator (120), and the first central plate (23) having a first central section (21).
8. The battery cell (100, 100A, 100C) according to any one of the preceding claims, wherein, The second end plate (30) includes a second hole plate (32) having a second opening and a second central plate (33), the second central plate being electrically insulated from the second hole plate (32) by a second insulator (130), the second opening being closed by a section of the second central plate (33) and a section of the second insulator (130), and the second central plate (33) having a second central section (31).
9. The battery cell (100, 100A) according to any one of the preceding claims, wherein, The second contact element (61) has a first connection portion (62) which is electrically connected to the inner wall of the housing component (11) in particular by clamping and / or welding, and the housing component (11) is electrically connected to the second terminal (102).
10. The battery cell (100B, 100C) according to claim 2 or according to claim 7 and claim 2, wherein, The at least one connecting element (80, 81, 82, 83, 84, 85) has a welded connection (84, 85) between a protrusion extending along the longitudinal axis (L) toward the second end plate (30) of the second contact element (61), and a second central section (31), and has a welded connection (81) through which the protrusion extending along the longitudinal axis (L) toward the first end plate (20) of the first contact element (51) is connected to the first terminal (101), and the cross-sectional area of the welded connection perpendicular to the longitudinal axis (L) is greater than the inner diameter of the electrode winding body (40).
11. The battery cell (100B, 100C) according to claim 10, wherein, The second end plate (30) includes a second perforated plate (32) having a second opening and a second central plate (33), the second central plate being electrically insulated from the second perforated plate (32) by a second insulator (130), the second opening being closed by a section of the second central plate (33) and the second insulator (130), and the second central section (31) being formed by a section of the second perforated plate (32) surrounding the second central plate (33).
12. The battery cell (100B, 100C) according to claim 10 or 11, wherein, The second end plate (30) is connected to the housing component (11) by laser welding process, especially to the inwardly protruding protrusion (12) of the housing component (11).
13. The battery cell (100, 100A, 100B, 100C) according to any one of the preceding claims, wherein, The second end plate (30), especially the second perforated plate (32), has a predetermined fracture point (34).
14. A vehicle (200), particularly an electric vehicle or a hybrid vehicle, having a battery cell (100, 100A, 100B, 100C) according to any one of the preceding claims and an electric drive motor (201) for driving the vehicle (200), said battery cell (100, 100A, 100B, 100C) being configured to supply electrical energy to the electric drive motor (201) to drive the vehicle (200).