Battery cell, battery, and electric device

Abstract

A battery cell, comprising: a casing which comprises a pole; a battery core which is accommodated in the casing, wherein the pole is located at one axial end of the battery core and is spaced apart from the battery core in the axial direction; and a current guide column which is arranged in the battery core in the axial direction of the battery core, wherein the current guide column is separately electrically connected to the battery core and the pole, the current guide column comprises an extension / contraction section, and the extension / contraction section can axially extend / contract along with the change of the axial distance between the battery core and the pole. The current guide column can buffer the impact on the weld mark between the current guide column and the pole, thereby improving reliability and service life; moreover, the present application also has the advantages of low internal resistance and strong current-carrying capacity. Also provided are a battery and an electric device.

Description

Battery cells, batteries and electrical devices Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a battery cell, a battery, and an electrical device. Background Art

[0002] Currently, after the collector disc is welded to the pole coil, a welding needle is typically inserted through the center hole of the pole coil to complete the welding of the collector disc to the pole post using torque welding. This method has the following disadvantages: a small weld area (limited by the diameter of the pole coil center hole), poor current handling capacity of torque welding / ultrasonic welding, high temperature rise during high-current fast charging, and a small weld area, which can cause weld peeling or collector disc tearing due to long-term use or vibration.

[0003] Application Contents

[0004] Based on this, it is necessary to provide a battery cell, a battery and an electrical device with high reliability and low impedance to address the above problems.

[0005] This application solves the technical problem in the following ways:

[0006] A battery cell, comprising:

[0007] a housing, the housing including a pole;

[0008] A battery cell is housed in the housing, wherein the pole is provided at one axial end of the battery cell and is spaced apart from the battery cell in the axial direction;

[0009] A guide column is provided in the battery cell along the axial direction of the battery cell. The guide column is conductively connected to the battery cell and the pole respectively. The guide column includes a telescopic section, which can generate axial expansion and contraction as the axial spacing between the battery cell and the pole changes.

[0010] As a preferred embodiment, the telescopic section generates axial telescopic expansion and contraction through its own elastic deformation.

[0011] As a preferred embodiment, the telescopic section includes at least one elastic connecting piece, and at least a portion of the elastic connecting piece along the axial direction deviates from a line connecting two axial ends of the elastic connecting piece.

[0012] As a preferred embodiment, the elastic connecting piece is in an arc shape, and the elastic connecting piece protrudes in a direction away from the axis of the guide column.

[0013] As a preferred embodiment, the elastic connecting piece includes two straight segments connected to each other, and the connecting portion of the two straight segments protrudes in a direction away from the axis of the guide column.

[0014] As a preferred embodiment, the telescopic section includes a plurality of the elastic connecting pieces, and the plurality of the elastic connecting pieces are arranged at intervals along the circumference of the guide column.

[0015] As a preferred embodiment, the telescopic section includes a first tubular section and a second tubular section telescopically accommodated in the first tubular section, and the telescopic section achieves telescopic movement in the axial direction through relative sliding between the first tubular section and the second tubular section.

[0016] As a preferred embodiment, the battery core includes a central hole, and the guide column is arranged in the central hole.

[0017] As a preferred embodiment, the battery cell is provided with a negative electrode lug at the axial end close to the pole, and a positive electrode lug at the axial end facing away from the pole, and the guide column is conductively connected to the positive electrode lug and the pole.

[0018] As a preferred embodiment, the battery cell further includes a positive current collecting disk in conductive contact with the positive electrode tab, and the positive current collecting disk is connected to the current guide post.

[0019] As a preferred embodiment, the battery cell further includes negative electrode current collecting plates respectively in conductive contact with the negative electrode tabs, and the current guide posts pass through the negative electrode current collecting plates and remain insulated from the negative electrode current collecting plates.

[0020] As a preferred embodiment, the battery cell further includes an insulating gasket, which is sleeved on the guide column and pressed on a side of the battery cell facing the pole.

[0021] As a preferred embodiment, the diameter R of the guide column satisfies: 3mm≤R≤10mm

[0022] As a preferred embodiment, the guide column is hollow, and the radial wall thickness W of the guide column satisfies: 0.1 mm ≤ W ≤ 4 mm.

[0023] As a preferred embodiment, the cross-sectional area S of the guide column satisfies: 0.942 mm 2 ≤S≤78.5mm 2 .

[0024] The present application also provides a battery comprising a plurality of battery cells as described in any one of the above preferred embodiments.

[0025] The present application also provides an electrical device, comprising a battery cell as described in any one of the above preferred embodiments or a battery as described in the above preferred embodiments.

[0026] The positive progress of this application is that when the battery cell is impacted, the telescopic section can adaptively expand and contract as the axial spacing between the battery cell and the pole changes, thereby reducing the impact of the impact on the weld connecting the guide column and the pole, preventing the weld from breaking or tearing. In addition, when the battery cell experiences radial contraction after long-term use, the telescopic section can also adaptively extend with the contraction of the battery cell, avoiding pulling on the weld, which may cause breakage or tearing of the weld. In summary, the solution of this application can improve the reliability and service life of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 is a schematic structural diagram of a battery cell in a preferred embodiment of the present application;

[0029] FIG2 is a cross-sectional view of the battery cell shown in FIG1 along line AA;

[0030] FIG3 is a schematic structural diagram of a flow guide column in the battery cell shown in FIG1 ;

[0031] FIG4 is an enlarged schematic diagram of the telescopic section of the guide column shown in FIG3 ;

[0032] FIG5 is a schematic structural diagram of a guide column in another embodiment of the present application;

[0033] FIG6 is an enlarged schematic diagram of the telescopic section of the guide column shown in FIG5 .

[0034] Description of the reference numerals: battery cell 10 ; housing assembly 100 ; housing 110 ; battery cell 200 ; current guide post 300 ; telescopic section 310 ; elastic connecting piece 311 ; liquid injection channel 320 ; pole 400 ; first current collecting plate 500 ; second current collecting plate 600 ; insulating gasket 700 . DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0041] The present application discloses an electrical device, a battery, and a battery cell. The electrical device includes the battery or the battery cell, and can be powered by the battery or the battery cell. The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement ride, an elevator, and a lifting device. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys. Electric tools include metal cutting tools, grinding tools, assembly tools, and railway tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. Energy storage devices may be energy storage walls, base station energy storage, container energy storage, and the like. Amusement rides may be carousels, bungee jumping machines, and the like. This application does not impose any special restrictions on the above-mentioned electrical devices.

[0042] For new energy vehicles, the above batteries can be used as a driving power source, thereby replacing fossil fuels to provide driving power.

[0043] The above-mentioned battery can be a battery pack or a battery module. When the above-mentioned battery is a battery pack, the battery pack specifically includes a battery management system (BMS) and a plurality of the above-mentioned battery cells. The plurality of battery cells can be electrically connected in series, in parallel, or in a mixture of series and parallel, and communicated with the battery management system to form a battery pack. The above-mentioned battery management system controls and monitors the working status of each battery cell. In addition, the plurality of battery cells can also be connected in series and / or in parallel first, and form a battery module with the module management system, and then the plurality of battery modules are electrically connected in series, in parallel, or in a mixture of series and parallel, and together with the battery management system form a battery pack.

[0044] The multiple battery cells in the battery pack or battery module can be mounted on a supporting structure such as a box, frame, or bracket. Electrical connections can be established between the individual battery cells and between the battery cells and the battery management system via a busbar assembly. The battery cells can be lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and their external shapes can be cylindrical, flat, rectangular, or other, but are not limited to these. Specifically, in this embodiment, the battery cells are cylindrical lithium-ion batteries.

[0045] 1 and 2 , a battery cell 10 in a preferred embodiment of the present application includes a housing assembly 100 , a battery cell 200 and a guide post 300 .

[0046] The housing assembly 100 includes a shell 110. The shell 110 can be formed from materials such as aluminum and stainless steel, and has a receiving cavity (not shown) formed therein to accommodate the battery cell 200, the guide column 300, and other components such as the electrolyte. The outer contour of the shell 110 determines the outer contour of the battery cell 10. Since the battery cell 10 in this embodiment is a cylindrical battery, the shell 110 is cylindrical. A pole 400 is provided on the end wall of the shell 110 at one axial end to serve as a current lead-out component.

[0047] The battery cell 200 is housed in the housing cavity of the shell 110 and is the core component of the battery cell 10. Among them, the battery cell 200 is generally formed by winding a positive electrode sheet, a negative electrode sheet and a diaphragm that acts as an insulator between the negative electrode sheet and the positive electrode sheet. The battery cell 200 is cylindrical and adapts to the shape of the shell 110. Moreover, the battery cell 200 has a center hole (not marked in the figure), which is concentrically arranged with the battery cell 200 and passes through the battery cell 200 axially. The pole 400 is located at one axial end of the battery cell 200 and is axially spaced apart from the battery cell 200. Specifically, there is an axial gap between the pole 400 and the battery cell 200.

[0048] The guide post 300 is long and is inserted into the center hole. The guide post 300 is in conductive contact with the pole 400 and the battery cell 200, respectively, to serve as a conductive path between the pole 400 and the battery cell 200. The guide post 300 has a certain mechanical strength and is generally formed from a metal with high conductivity, such as copper, aluminum, or their alloys. The guide post 300 can provide support from the inside of the battery cell 200, thereby effectively preventing the inner electrode of the battery cell 200 from unwinding and expanding inward, thereby ensuring good contact between the interface of the inner electrode of the battery cell 200.

[0049] Furthermore, the battery cell 200 generates heat during charging and discharging, and the larger the diameter of the battery cell 200, the harder it is to dissipate the internal heat. The guide post 300 also acts as a heat conductor, accelerating the outward dissipation of heat generated within the battery cell 200. Therefore, the provision of the guide post 300 can also narrow the gap in heat dissipation efficiency between the inner and outer layers of the battery cell 200, thereby reducing the temperature difference between the inner and outer layers of the battery cell 200 and, to a certain extent, improving the lifespan of the battery cell 10.

[0050] The guide post 300 is provided with an axially extending telescopic section 310. This telescopic section 310 can expand and contract along the extension direction of the center hole, i.e., the axial direction. Therefore, when the battery cell 10 is subjected to external impact forces, causing the axial spacing between the battery cell 200 and the terminal 400 to change, the telescopic section 310 can adaptively expand and contract axially in response to the change in axial spacing between the battery cell 200 and the terminal 400. This reduces the strain on the weld between the terminal 400 and the guide post 300, thus preventing the weld between the terminal 400 and the guide post 300 from loosening and further improving the reliability of the battery cell 10.

[0051] In addition, the battery cell 200 will shrink in the axial direction after long-term use, causing the axial distance between the battery cell 200 and the pole 400 to increase. At this time, the telescopic section 310 can also extend axially to reduce the pulling on the welding point between the pole 400 and the guide column 300, thereby making the weld between the pole 400 and the guide column 300 less likely to loosen, further improving the service life of the battery cell 10.

[0052] In this embodiment, the telescopic section 310 is typically located in the area of ​​the guide post 300 outside the center hole, specifically, between the battery cell 200 and the pole 400. This allows the portion of the guide post 300 located within the center hole to maintain its shape even when the length of the guide post 300 changes. This prevents the guide post 300 from moving relative to the center hole of the battery cell 200 due to expansion and contraction, thereby preventing wear on the inner pole piece of the battery cell 200.

[0053] In this embodiment, the telescopic section 310 realizes expansion and contraction in the axial direction through its own deformation. Specifically, the telescopic section 310 includes at least one elastic connecting piece 311, and each elastic connecting piece 311 deviates at least partially from the line connecting the axial ends of the elastic connecting piece in the axial direction. Therefore, after the elastic connecting piece 311 is subjected to axial pressure or pulling, the elastic connecting piece 311 can stretch or bend in the axial direction to cause the telescopic section 310 to undergo elastic deformation.

[0054] Specifically, when the elastic connecting piece 311 is extended, the axial dimension of the guide column 300 increases; when the elastic connecting piece 311 is bent, the axial dimension of the guide column 300 decreases. The elastic connecting piece 311 can be formed by partially etching or milling the sidewall of the guide column 300 and can be integrally formed with the rest of the guide column 300.

[0055] It should be noted that, in other embodiments, the telescopic section 310 may be obtained by replacing the material of a partial area of ​​the guide column 300 with an elastic material, or the telescopic section 310 may be configured in the form of a bellows.

[0056] In this embodiment, each elastic connecting piece 311 is arc-shaped and protrudes in a direction away from the axis of the guide column 300. The arc-shaped elastic connecting piece 311 has a smooth surface, thereby preventing damage to the battery cell 200 during assembly and use.

[0057] Obviously, the elastic connecting piece 311 can be in various shapes as long as it can be stretched and bent along the axial direction of the guide column 300 .

[0058] For example, referring to Figures 5 and 6 , in another embodiment, each elastic connecting piece 311 includes two interconnected straight segments, with the connecting portion of the two straight segments protruding in a direction away from the axis of the guide column 300. Under the action of an external force, the two straight segments can move closer or farther away from each other, thereby causing the elastic connecting piece 311 to stretch or bend.

[0059] It should be noted that in other embodiments, the guide column 300 can also be adjusted in length by being integrally telescopic. For example, the guide column 300 can be configured as a bellows. Alternatively, the guide column 300 can be configured by inserting multiple pipe segments, including a first pipe segment and a second pipe segment that can be accommodated in the first pipe segment. The axial dimension of the guide column 300 can be adjusted by relative sliding between the first and second pipe segments.

[0060] In this embodiment, a first tab (not shown) and a second tab (not shown) are provided at both ends of the battery cell 200. In this embodiment, the first tab is the positive tab and is located below the battery cell 200; the second tab is the negative tab and is located above the battery cell 200.

[0061] Furthermore, the second tab is electrically connected to the housing 110, so the axial end wall of the housing 110 with the terminal post 400 can serve as the negative electrode of the battery cell 10. Furthermore, the second tab is located on the side of the battery cell 200 facing the top cover 120, so the current transmission path between the second tab and the axial end wall is shorter, which helps reduce the negative electrode impedance of the battery cell 10.

[0062] Furthermore, the two ends of the guide column 300 are electrically connected to the pole 400 and the first pole tab respectively, so the guide column 300 can serve as a conductive path between the first pole tab and the pole 400. Since the guide column 300 is made of highly conductive metals such as copper and aluminum and has a large cross-sectional area, it has lower impedance than shell wall transmission or pole tab lead-out, thereby reducing the positive electrode impedance of the battery cell 10.

[0063] Please refer to Figure 2 again. In this embodiment, the battery cell 10 also includes a first current collecting plate 500. The first current collecting plate 500 is arranged on the side of the battery cell 200 facing away from the top cover 120 and is welded to the first tab. The end of the guide column 300 away from the top cover 120 is welded to the first current collecting plate 500.

[0064] During assembly of the battery cell 10, the guide post 300 can be welded to the first current collecting plate 500 before being inserted into the center hole of the battery cell 200. The first current collecting plate 500 increases the contact area between the guide post 300 and the first tab, thereby further reducing the positive electrode impedance. Furthermore, the first current collecting plate 500 acts as an axial limiter for the electrode tabs of the battery cell 200. Combined with the internal-outward support provided by the guide post 300, this effectively prevents the battery cell 200 from deforming due to gravity.

[0065] In this embodiment, the battery cell 10 further includes a second current collecting tray 600, which is disposed on the side of the battery cell 200 facing the top cover 120 and welded to the second electrode tab. The edge of the second current collecting tray 600 is welded to the inner wall of the housing 110. The current guide post 300 passes through the second current collecting tray 600 and is insulated from the second current collecting tray 600. The second current collecting tray 600 increases the contact area between the housing 110 and the second electrode tab and shortens the current transmission path, thereby further reducing the negative electrode impedance.

[0066] Furthermore, in this embodiment, the battery cell 10 further includes an insulating washer 700. The insulating washer 700 is sleeved over the current guide post 300 and pressed against the side of the battery cell 200 facing the top cover 120 to provide insulation between the current guide post 300 and the second current collecting plate 600. The insulating washer 700 can remain stable under the restraint of the current guide post 300, thereby ensuring the reliability of the insulation between the current guide post 300 and the second current collecting plate 600.

[0067] In this embodiment, the guide column 300 is a hollow column, and the hollow portion of the guide column 300 can be used as a liquid injection channel 320, thereby reducing the overall weight and manufacturing cost of the battery cell 10. In addition, the diameter R and radial thickness of the guide column can be designed according to the requirements of the flow capacity. Specifically, the diameter R of the guide column 300 satisfies: 3mm≤R≤10mm. The radial wall thickness W of the guide column 300 satisfies: 0.1mm≤W≤4mm. Based on this, the cross-sectional area S of the guide column 300 meets the following range: 0.942mm 2 ≤S≤78.5mm 2 The guide column 300 can be manufactured by a metal sheet winding process or by boring a metal column. It is preferred to use a winding process which is more cost-effective.

[0068] When the guide column 300 uses the above parameters, when its material is aluminum, the maximum continuous overcurrent capacity is 280A (the overall temperature rise of the aluminum column is less than 50°C), which fully meets the limit level of continuous charge and discharge of 4695 fast-charging battery cells at 6C (≈200A), and the resistance of the structural components can be reduced by more than 0.3mΩ. When its material is copper, the maximum overcurrent capacity can be increased by about 1.5 times, to about 420A. To meet continuous charge and discharge of more than 10C (approximately equal to 300A), the resistance of the structural components can be reduced by more than 0.3mΩ.

[0069] The present application also provides a battery comprising a plurality of battery cells according to any one of the above preferred embodiments. The battery also has the advantages of long service life, high reliability, low internal resistance, and good current capacity.

[0070] The present application also provides an electrical device comprising a battery cell as described in any one of the preferred embodiments above or a battery as described in the preferred embodiments above. The electrical device using the battery has the advantages of low loss, long service life, and high reliability.

[0071] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery cell, characterized in that: include: A housing, the housing comprising a pole; A battery cell is housed in the shell, wherein the pole is located at one axial end of the battery cell and is spaced apart from the battery cell in the axial direction; A guide column is arranged in the battery cell along the axial direction of the battery cell. The guide column is conductively connected to the battery cell and the pole respectively. The guide column includes a telescopic section. The telescopic section can generate axial telescopic expansion and contraction as the axial spacing between the battery cell and the pole changes.

2. The battery cell according to claim 1, characterized in that: The telescopic section generates axial telescopic expansion and contraction through its own elastic deformation.

3. The battery cell according to claim 2, characterized in that: The telescopic section comprises at least one elastic connecting piece, and at least a portion of the elastic connecting piece along the axial direction deviates from a line connecting two axial ends of the elastic connecting piece.

4. The battery cell according to claim 3, characterized in that: The elastic connecting piece is in an arc shape, and the elastic connecting piece protrudes in a direction away from the axis of the guide column.

5. The battery cell according to claim 3, characterized in that: The elastic connecting piece includes two straight line segments connected to each other, and the connecting portion of the two straight line segments protrudes in a direction away from the axis of the guide column.

6. The battery cell according to any one of claims 3 to 5, characterized in that: The telescopic section includes a plurality of elastic connecting pieces, and the plurality of elastic connecting pieces are arranged at intervals along the circumference of the guide column.

7. The battery cell according to claim 1, characterized in that: The telescopic section comprises a first tubular section and a second tubular section telescopically accommodated in the first tubular section. The telescopic section achieves telescopic movement in the axial direction through relative sliding between the first tubular section and the second tubular section.

8. The battery cell according to claim 1, characterized in that: The battery core comprises a central hole, and the guide column is arranged in the central hole.

9. The battery cell according to claim 1, characterized in that: The battery cell is provided with a negative electrode lug at an axial end close to the pole, and a positive electrode lug at an axial end facing away from the pole. The guide column is conductively connected to the positive electrode lug and the pole, and the negative electrode lug is conductively connected to the shell.

10. The battery cell according to claim 9, characterized in that: The battery cell further includes a positive current collecting plate in conductive contact with the positive electrode tab, and the positive current collecting plate is conductively connected to the current guide column.

11. The battery cell according to claim 9, characterized in that: The battery cell further includes negative electrode current collecting plates respectively in conductive contact with the negative electrode tabs, and the current guide posts pass through the negative electrode current collecting plates and remain insulated from the negative electrode current collecting plates.

12. The battery cell according to claim 11, characterized in that: The battery cell further comprises an insulating gasket, which is sleeved on the current guide column and pressed on a side of the battery cell facing the pole.

13. The battery cell according to claim 1, characterized in that: The diameter R of the guide column satisfies: 3mm≤R≤10mm.

14. The battery cell according to claim 1, characterized in that: The guide column is hollow, and the radial wall thickness W of the guide column satisfies: 0.1mm≤W≤4mm.

15. The battery cell according to claim 14, characterized in that: The cross-sectional area S of the guide column satisfies: 0.942 mm 2 ≤S≤78.5mm 2 .

16. A battery comprising the battery cell according to any one of claims 1 to 15.

17. An electrical device comprising the battery as claimed in claim 16.

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