A single cell and a battery pack

Abstract

The application discloses a single battery and a battery pack, and relates to the technical field of new energy batteries. The single battery has a height direction, and comprises a shell, a top cover connected with one end of the shell along the height direction, a pressure relief port penetrating through the top cover along the height direction, an electrode assembly arranged in the shell, an insulating piece arranged in the shell and connected with one side of the top cover facing the electrode assembly, and a first supporting piece arranged in the shell and connected with one side of the top cover facing the insulating piece. The first supporting piece is arranged on the circumferential side of the pressure relief port, one side of the insulating piece facing the top cover is provided with a first avoiding groove, and the first supporting piece is arranged in the first avoiding groove. The single battery provided by the application can reduce the possibility of the pressure relief port being blocked and reduce the risk of explosion of the single battery.

Description

Technical Field

[0001] This application relates to the field of new energy battery technology, and in particular to a single cell battery and a battery pack. Background Technology

[0002] Currently, the cover plate assembly of a single battery cell is usually equipped with a pressure relief port and an explosion-proof valve covering the pressure relief port. When a single battery cell experiences thermal runaway, the pressure can be relieved through the explosion-proof valve at the pressure relief port, thereby reducing the risk of the single battery cell exploding.

[0003] However, when a single cell experiences thermal runaway, the insulating components in the electrode assembly and cover plate assembly inside the cell will melt and produce molten material. Under the action of internal airflow, the molten material will block the pressure relief port at the explosion-proof valve, affecting the venting and pressure relief, and increasing the risk of explosion. Utility Model Content

[0004] This application provides a single cell and a battery pack to reduce the possibility of the pressure relief port being blocked and reduce the risk of single cell explosion.

[0005] This application provides a single-cell battery with a height orientation, the single-cell battery comprising:

[0006] case;

[0007] A top cover is connected to one end of the housing along the height direction, and the top cover is provided with a pressure relief port that extends through the height direction;

[0008] Electrode assemblies are disposed within the housing;

[0009] An insulating element is disposed in the housing and connected to the side of the top cover facing the electrode assembly;

[0010] A first support member is disposed in the housing and connected to the side of the top cover facing the insulating member. The first support member is disposed on the periphery of the pressure relief port. The side of the insulating member facing the top cover is provided with a first clearance groove, and the first support member is accommodated in the first clearance groove.

[0011] In some possible implementations, a plurality of first supports are provided on the side of the top cover facing the insulator, and the plurality of first supports are distributed at intervals around the pressure relief port.

[0012] Alternatively, the top cover may have a first support member on the side facing the insulating member, and the first support member may be continuously arranged around the periphery of the pressure relief port.

[0013] In some possible implementations, a second support is connected to the end of the first support member away from the top cover. The second support member covers the pressure relief port and has a first through hole extending along the height direction. The first through hole communicates with the pressure relief port.

[0014] In some possible implementations, the single cell further includes a third support member disposed on the side of the top cover facing the insulator, the third support member extending in the height direction toward the electrode assembly and passing through the insulator to abut against the electrode assembly.

[0015] In some possible implementations, there are multiple third support members located around the top cover. The insulating member has a clearance hole extending along the height direction. The third support member passes through the clearance hole and abuts against the electrode assembly.

[0016] In some possible implementations, the third support member includes a first support portion and a second support portion connected together, both of which pass through the clearance hole.

[0017] In some possible implementations, the single cell further includes an insulating layer connected to the side of the third support facing the electrode assembly, the insulating layer abutting against the electrode assembly.

[0018] In some possible implementations, the single cell further includes a fourth support member, which includes a connected portion and a third support portion;

[0019] The connecting portion is located on the side of the top cover near the insulating component;

[0020] The third support portion extends from the end of the connecting portion to the side of the insulating member facing the electrode assembly and abuts against the electrode assembly.

[0021] In some possible implementations, the insulating member has a second clearance groove on the side facing the top cover, and the connecting portion is located in the second clearance groove.

[0022] In addition, this application also provides a battery pack, including the single battery cells provided in the above embodiments.

[0023] The beneficial effects of this application are as follows: In the single-cell battery provided by this application, a first support member is provided around the pressure relief port, which can disperse and discharge the molten material, reduce the probability of the pressure relief port being blocked by the molten material, reduce the impact on the venting and pressure relief of the pressure relief port, and thus reduce the risk of explosion due to blockage of the pressure relief port. In addition, the first support member can be accommodated in the first clearance groove on the insulating member, which can improve the space utilization rate inside the casing and avoid affecting the energy density of the single-cell battery. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 Schematic diagrams of the structure of a single cell are shown in some embodiments;

[0026] Figure 2 Schematic diagrams of the exploded structure of a single cell are shown in some embodiments;

[0027] Figure 3 A cross-sectional structural diagram of the top cover location is shown in some embodiments;

[0028] Figure 4 Exploded structural diagrams of the top cover and insulation layer in some embodiments are shown;

[0029] Figure 5 A three-dimensional structural schematic diagram of the top cover location is shown in some embodiments;

[0030] Figure 6 A three-dimensional structural schematic diagram of the insulating element in some embodiments is shown;

[0031] Figure 7 Another three-dimensional structural schematic diagram of the insulating element in some embodiments is shown;

[0032] Figure 8 A partial cross-sectional structural schematic diagram of a single cell is shown in some other embodiments;

[0033] Figure 9 A cross-sectional structural schematic diagram of the top cover location is shown in some other embodiments;

[0034] Figure 10 Structural schematic diagrams of the top cover location are shown in some other embodiments;

[0035] Figure 11 A partial structural schematic diagram of the top cover location is shown in some other embodiments;

[0036] Figure 12 Schematic diagrams of the insulating elements in other embodiments are shown.

[0037] Explanation of key component symbols:

[0038] 100 - Shell; 101 - Opening;

[0039] 200-Electrode assembly;

[0040] 310-Top cover; 311-Pressure relief port; 320-Insulating component; 321-Second clearance groove; 322-Clearing hole; 323-First clearance groove; 324-Second connecting hole; 331-Pressure relief component; 340-Third support component; 341-First support part; 342-Second support part; 350-Insulating layer; 360-First support component; 370-Second support component; 371-First connecting hole; 380-Electrode post; 390-Fourth support component; 391-Connecting part; 392-Third support part;

[0041] Z-Height Direction. Detailed Implementation

[0042] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] Example 1

[0048] like Figures 1 to 3 , Figure 7 As shown, an embodiment provides a single-cell battery with a height direction Z. In this embodiment, the single-cell battery includes a housing 100, a top cover 310, an electrode assembly 200, an insulating member 320, and a first support member 360. The top cover 310 can be connected to one end of the housing 100 along the height direction Z. Specifically, the top cover 310 can cover the opening 101 of the housing 100 and is welded to the housing 100. A pressure relief port 311 is provided on the top cover 310, which extends through the top cover 310 along the height direction Z. The pressure relief port 311 connects the interior of the housing 100 with the external environment. When the single-cell battery experiences thermal runaway, it can release gas and pressure to the external environment through the pressure relief port 311, reducing the risk of explosion.

[0049] In some embodiments, both the electrode assembly 200 and the insulating member 320 are disposed within the housing 100. The insulating member 320 may be located on the side of the top cover 310 facing the electrode assembly 200 and connected to that side. A first support member 360 is also disposed within the housing 100 and may be connected to the side of the top cover 310 facing the insulating member 320. In this embodiment, the first support member 360 is disposed around the pressure relief port 311. A first clearance groove 323 is provided on the side of the insulating member 320 facing the top cover 310, and the first support member 360 is accommodated within the first clearance groove 323.

[0050] In this embodiment, a first support member 360 is provided around the pressure relief port 311 to disperse and discharge the molten material, reducing the probability of the pressure relief port 311 being blocked by the molten material, reducing the impact on the venting and pressure relief of the pressure relief port 311, and thus reducing the risk of explosion of a single battery cell due to blockage of the pressure relief port 311. In addition, the first support member 360 is housed in the first clearance groove 323 on the insulating member 320, which can improve the space utilization rate inside the housing 100 and avoid affecting the energy density of the single battery cell.

[0051] Example 2

[0052] The embodiment provides a single-cell battery, which can be further improved based on Embodiment 1:

[0053] like Figures 1 to 3 As shown, in some embodiments, the top cover 310 may be made of a metal such as aluminum alloy or steel. The individual battery also includes a pressure relief component 331, which may cover the side of the pressure relief port 311 facing the electrode assembly 200 and is connected to the top cover 310. In embodiments, the pressure relief component 331 and the top cover 310 may be fixedly connected by laser welding or adhesive bonding. When thermal runaway occurs in the individual battery, the connection between the pressure relief component 331 and the top cover 310 can be disrupted, opening the pressure relief port 311 and connecting the interior of the housing 100 to the external environment, thus achieving pressure relief.

[0054] In some embodiments, the single battery cell further includes an electrode post 380, which is fixedly mounted to the top cover 310 by means of riveting or other processes. One end of the electrode post 380 may extend to the side of the top cover 310 facing the electrode assembly 200 and may be electrically connected to the electrode assembly 200 through a structure such as a conductive sheet (not shown). The other end of the electrode post 380 may be exposed on the side of the top cover 310 away from the electrode assembly 200, which facilitates electrical connection with other external devices. Alternatively, the single battery cell may include two electrode posts 380, both of which are insulated from the top cover 310. One electrode post 380 may be used as the positive electrode, and the other electrode post 380 may be used as the negative electrode.

[0055] like Figures 3 to 5 , Figure 11 As shown, in some embodiments, a plurality of first support members 360 are provided on the side of the top cover 310 facing the insulating member 320. The plurality of first support members 360 can be distributed at intervals on the periphery of the pressure relief port 311, and the plurality of first support members 360 are all accommodated in the first relief groove 323 on the side of the insulating member 320 facing the top cover 310.

[0056] In other embodiments, a first support member 360 may be provided on the side of the top cover 310 facing the insulator 320, and the first support member 360 may be continuously arranged around the periphery of the pressure relief port 311. That is, the first support member 360 may have a ring-shaped structure, and the first support member 360 may be accommodated in the first relief groove 323 on the side of the insulator 320 facing the top cover 310.

[0057] In the embodiment, the cross section of the first support member 360 parallel to the height direction Z can be square, rhomboid, or triangular, etc.

[0058] In some embodiments, the first support member 360 may be made of an insulating material such as polyethylene terephthalate (PET) or polycarbonate (PC). Furthermore, the first support member 360 may be fixedly connected to the side of the top cover 310 facing the insulating member 320 by means of adhesive bonding or heat fusion.

[0059] In other embodiments, the first support member 360 may also be made of metal materials such as aluminum alloy or steel, and may be fixedly connected to the top cover 310 by means of integral molding or welding. The first support member 360 and the electrode assembly 200 may be isolated and insulated by the insulating member 320 to prevent the first support member 360 from contacting the electrode assembly 200 and causing a short circuit.

[0060] like Figures 2 to 5 As shown, in some embodiments, two first support members 360 are provided on the side of the top cover 310 facing the insulating member 320, and the two first support members 360 are respectively disposed on opposite sides of the pressure relief port 311. The end of the first support member 360 away from the top cover 310 is connected to the second support member 370. The second support member 370 can cover the pressure relief port 311, and a first connecting hole 371 can be formed on the second support member 370, which can penetrate the second support member 370 along the height direction Z. Accordingly, the first connecting hole 371 can communicate with the pressure relief port 311 and the internal space of the housing 100 respectively. In the embodiments, the second support member 370 can be fixedly connected to the first support member 360 by means of integral molding, hot melt connection or bonding. The material of the second support member 370 can be the same as that of the first support member 360. In addition, the second support member 370 can also be accommodated in the first relief groove 323 on the side of the insulating member 320 facing the top cover 310.

[0061] When a single cell experiences thermal runaway, the first support member 360 and the second support member 370 can cooperate to provide a blocking function for the molten material, preventing the molten material from blocking the pressure relief port 311 and causing the single cell to explode.

[0062] like Figures 2 to 6As shown, in some embodiments, a third support member 340 is further provided on the side of the top cover 310 facing the electrode assembly 200, and a portion of the third support member 340 can extend along the height direction Z. In the embodiments, one end of the third support member 340 can be connected to the side of the top cover 310 facing the insulator 320, the third support member 340 can pass through the insulator 320, and the end of the third support member 340 away from the top cover 310 abuts against the side of the electrode assembly 200 facing the top cover 310. Thus, when a single cell experiences thermal runaway, the third support member 340 can restrict the movement of the electrode assembly 200 in the height direction Z, further reducing the probability of the pressure relief port 311 being blocked, thereby reducing the risk of the single cell exploding.

[0063] In some embodiments, four third support members 340 may be provided on the side of the top cover 310 facing the electrode assembly 200. The four third support members 340 may be respectively disposed at the four corner positions of the top cover 310, and the third support members 340 may be disposed near the edge of the top cover 310. In an embodiment, four clearance holes 322 may be provided on the insulating member 320, and the clearance holes 322 may penetrate the insulating member 320 along the height direction Z. The four third support members 340 may be correspondingly disposed in the four clearance holes 322, and the end face of the third support member 340 away from the top cover 310 may be flush with the surface of the insulating member 320 facing the electrode assembly 200, or the end face of the third support member 340 away from the top cover 310 may protrude relative to the side of the insulating member 320 facing the electrode assembly 200. Thus, it can be ensured that the end face of the third support member 340 away from the top cover 310 can abut against the electrode assembly 200 to limit the electrode assembly 200 from moving along the height direction Z.

[0064] In other embodiments, the top cover 310 may also be provided with two or three or more third support members 340 on the side facing the electrode assembly 200. The insulating member 320 may have a number of clearance holes 322 equal to the number of third support members 340, and the multiple third support members 340 may be correspondingly inserted into the multiple clearance holes 322 and abut against the electrode assembly 200.

[0065] In other embodiments, a third support member 340 may also be provided on the side of the top cover 310 facing the electrode assembly 200. The third support member 340 may be continuously provided around the peripheral edge of the top cover 310, that is, the third support member 340 may be annular. In addition, the third support member 340 may be disposed around the periphery of the insulating member 320 and abut against the electrode assembly 200.

[0066] like Figure 2 , Figure 5 and Figure 6As shown, in some embodiments, the third support member 340 may include an integral first support portion 341 and a second support portion 342. Both the first support portion 341 and the second support portion 342 are plate-like structures parallel to the height direction Z and may intersect. In some embodiments, the first support portion 341 and the second support portion 342 are perpendicular. The first support portion 341 and the second support portion 342 in the same third support member 340 may be arranged on two adjacent side positions of the top cover 310. Correspondingly, the third support member 340 may be L-shaped, and the clearance hole 322 on the insulating member 320 may also be an L-shaped hole, adapted to the third support member 340. The first support portion 341 and the second support portion 342 both pass through the clearance hole 322 and abut against the side of the electrode assembly 200 facing the top cover 310. This improves the structural stability of the third support member 340 and more effectively prevents the electrode assembly 200 from shifting along the height direction Z.

[0067] In some embodiments, the third support 340 may be made of insulating materials such as PC or PET, and may be fixedly connected to the top cover 310 by means of bonding or hot-melt connection. Simultaneously, the third support 340 may be insulated from the electrode assembly 200 to prevent short circuits.

[0068] In other embodiments, the third support member 340 may also be made of metal materials such as aluminum alloy or steel, and can be fixedly connected to the top cover 310 by welding or integral molding. Correspondingly, the single cell also includes an insulating layer 350, which can be connected to the side of the third support member 340 facing the electrode assembly 200, and the surface of the insulating layer 350 facing away from the third support member 340 can abut against the electrode assembly 200. Thus, the insulating layer 350 can provide insulation protection between the third support member 340 and the electrode assembly 200. In embodiments, the insulating layer 350 may be made of insulating paint or insulating plating, and can be connected to the third support member 340 by spraying or coating. Alternatively, the insulating layer 350 can also be made of insulating film such as PC film or PET film, and can be connected to the side of the third support 340 facing the electrode assembly 200 or the side of the insulating member 320 facing the electrode assembly 200 by means of adhesive bonding or hot melt connection. When the insulating layer 350 is connected to the insulating member 320, the insulating layer 350 can cover the end of the clearance hole 322 facing the electrode assembly 200 to provide insulation between the third support 340 and the electrode assembly 200.

[0069] like Figure 2 and Figure 3As shown, in some embodiments, the insulating element 320 may be made of insulating materials such as PC or PET, providing insulation protection between the top cover 310 and the electrode assembly 200. Alternatively, the insulating element 320 may be fixedly connected to the top cover 310 via the electrode post 380, also providing insulation between the top cover 310 and the electrode post 380.

[0070] In some embodiments, the insulating member 320 is further provided with a second connecting hole 324, which may be located at the bottom of the first clearance groove 323. The second connecting hole 324 may penetrate the insulating member 320 along the height direction Z to connect the pressure relief port 311 and the internal space of the housing 100.

[0071] Example 3

[0072] This embodiment provides a single-cell battery, which may differ from Embodiment 2 in that:

[0073] like Figures 8 to 12 As shown, in this embodiment, a plurality of fourth support members 390 are provided on the side of the top cover 310 facing the electrode assembly 200. Each fourth support member 390 may include a connected connecting portion 391 and a third support portion 392. Both the connecting portion 391 and the third support portion 392 are plate-shaped and may intersect. In some embodiments, the connecting portion 391 may be perpendicular to the third support portion 392, wherein the connecting portion 391 may be perpendicular to the height direction Z, and the third support portion 392 may be parallel to the height direction Z. In this embodiment, the connecting portion 391 and the third support portion 392 may be an integral structure.

[0074] In some embodiments, the connecting portion 391 may abut against the surface of the top cover 310 facing the electrode assembly 200 and be fixedly connected to the top cover 310. The third support portion 392 may be disposed on the periphery of the insulating member 320, with one end of the third support portion 392 away from the connecting portion 391 extending to the side of the insulating member 320 facing the electrode assembly 200 and abutting against the side of the electrode assembly 200 facing the top cover 310. In some embodiments, the end face of the third support portion 392 away from the connecting portion 391 may be flush with the surface of the insulating member 320 facing the electrode assembly 200, or the end of the third support portion 392 away from the connecting portion 391 may protrude relative to the side of the insulating member 320 facing the electrode assembly 200.

[0075] In some embodiments, the third support 340 may be made of insulating materials such as PC or PET, and the connecting part 391 may be fixedly connected to the top cover 310 by means of adhesive bonding or hot-melt bonding.

[0076] In other embodiments, the third support member 340 may also be made of metal materials such as aluminum alloy or steel, and the third support member 340 may be fixedly connected to the top cover 310 by means of integral molding or welding. An insulating layer 350 may be provided on the side of the third support portion 392 facing the electrode assembly 200, and the side of the insulating layer 350 away from the third support portion 392 may abut against the electrode assembly 200.

[0077] In some embodiments, the insulating member 320 is further provided with a second clearance groove 321 on the side facing the top cover 310, and the connecting part 391 can be accommodated in the second clearance groove 321. Thus, the connecting part 391 can avoid occupying additional space in the height direction Z, improve the space utilization rate inside the single cell, and avoid affecting the energy density of the single cell.

[0078] In some embodiments, four fourth support members 390 may be provided on the side of the top cover 310 facing the electrode assembly 200, and the four fourth support members 390 may be respectively disposed on the four sides of the top cover 310.

[0079] In other embodiments, the top cover 310 may also be provided with two or three or more fourth supports 390 on the side facing the electrode assembly 200.

[0080] In some other embodiments, a fourth support member 390 may also be provided on the side of the top cover 310 facing the electrode assembly 200. The fourth support member 390 may be continuously provided around the peripheral edge of the top cover 310, that is, the fourth support member 390 may be in a ring shape.

[0081] The embodiment also provides a battery pack, which may include the individual battery cells provided in the embodiment.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0083] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A single-cell battery, characterized in that, Having a height orientation (Z), the single cell comprises: Casing (100); The top cover (310) is connected to one end of the housing (100) along the height direction (Z), and the top cover (310) is provided with a pressure relief port (311) that extends through the height direction (Z). An electrode assembly (200) is disposed in the housing (100); An insulating element (320) is disposed in the housing (100) and connected to the top cover (310) on the side facing the electrode assembly (200); A first support member (360) is disposed in the housing (100) and connected to the side of the top cover (310) facing the insulating member (320). The first support member (360) is disposed on the periphery of the pressure relief port (311). The side of the insulating member (320) facing the top cover (310) is provided with a first clearance groove (323). The first support member (360) is accommodated in the first clearance groove (323).

2. The single-cell battery according to claim 1, characterized in that, The top cover (310) is provided with a plurality of first support members (360) on the side facing the insulating member (320), and the plurality of first support members (360) are distributed at intervals around the pressure relief port (311); Alternatively, the top cover (310) may have a first support member (360) on the side facing the insulating member (320), and the first support member (360) may be continuously arranged around the periphery of the pressure relief port (311).

3. The single-cell battery according to claim 1, characterized in that, The first support member (360) is connected to a second support member (370) at one end away from the top cover (310). The second support member (370) covers the pressure relief port (311). The second support member (370) has a first connecting hole (371) that extends through the height direction (Z). The first connecting hole (371) communicates with the pressure relief port (311).

4. The single-cell battery according to any one of claims 1 to 3, characterized in that, The single cell also includes a third support member (340), which is disposed on the side of the top cover (310) facing the insulator (320). The third support member (340) extends in the height direction (Z) toward the electrode assembly (200) and passes through the insulator (320) to abut against the electrode assembly (200).

5. The single-cell battery according to claim 4, characterized in that, There are multiple third support members (340), and the multiple third support members (340) are located on the periphery of the top cover (310). The insulating member (320) has a clearance hole (322) that runs through the height direction (Z). The third support member (340) passes through the clearance hole (322) and abuts against the electrode assembly (200).

6. The single-cell battery according to claim 5, characterized in that, The third support member (340) includes a first support portion (341) and a second support portion (342) connected together, both of which pass through the clearance hole (322).

7. The single-cell battery according to claim 5, characterized in that, The single cell also includes an insulating layer (350) connected to the side of the third support (340) facing the electrode assembly (200), and the insulating layer (350) abuts against the electrode assembly (200).

8. The single-cell battery according to any one of claims 1 to 3, characterized in that, The single cell also includes a fourth support member (390), which includes a connecting part (391) and a third support part (392). The connecting portion (391) is disposed on the side of the top cover (310) near the insulating member (320); The third support (392) extends from one end away from the connecting part (391) to the side of the insulating member (320) facing the electrode assembly (200) and abuts against the electrode assembly (200).

9. The single-cell battery according to claim 8, characterized in that, The insulating component (320) has a second clearance groove (321) on the side facing the top cover (310), and the connecting part (391) is located in the second clearance groove (321).

10. A battery pack, characterized in that, Including the single cell battery as described in any one of claims 1 to 9.

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