Battery cell, battery device and electric device

Abstract

A battery cell, a battery device and an electric device. The battery cell comprises a casing component, an electrode component and terminal components, wherein the casing component comprises a first casing wall. The terminal components each comprise a terminal body, a clamping structure, a first inner insulating member and an outer insulating member, wherein the terminal body is connected to the electrode component; the clamping structure is connected to the first casing wall and is provided with a clamping groove for clamping the terminal body; the first inner insulating member is located in the clamping groove and is located between an inner wall of the clamping structure and the terminal body; the outer insulating member at least partially covers an outer wall of the clamping structure; the clamping structure is provided with communication portions; and the first inner insulating member is connected to the outer insulating member by means of the communication portions. In the technical solution of the embodiments of the present application, the insulation reliability between each clamping structure and a busbar component, between the first casing wall and the busbar component and between each clamping structure and each terminal body can be improved, thereby reducing short-circuit problems and being conducive to improving the reliability of use of the battery cell.

Description

Battery cells, battery packs, and electrical devices Technical Field

[0001] This application relates to the field of batteries, specifically to a battery cell, a battery device, and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] The battery cells in the related technologies are prone to short circuits, resulting in low reliability of the battery cells.

[0004] Summary of the Invention

[0005] In view of the above problems, this application provides a battery cell, a battery device, and an electrical device that can improve the reliability of use.

[0006] In a first aspect, this application provides a battery cell, comprising: a housing component including a first housing wall; an electrode component housed within the housing component; and a terminal component disposed on the first housing wall, including a terminal body, a clamping structure, and a separately disposed first inner insulating member and an outer insulating member; the terminal body is connected to the electrode component; the clamping structure is connected to the first housing wall and has a clamping groove for clamping the terminal body, the first inner insulating member is located within the clamping groove and between the inner wall of the clamping structure and the terminal body, and the outer insulating member at least partially covers the outer wall of the clamping structure; wherein the clamping structure has a communicating portion, and the first inner insulating member and the outer insulating member are connected through the communicating portion.

[0007] In the technical solution of this application embodiment, the outer insulating member at least partially covers the outer wall of the clamping structure, so that the outer insulating member can separate the clamping structure and the busbar component, thereby achieving insulation between the clamping structure and the busbar component, and between the first shell wall and the busbar component. A connecting part is provided on the clamping structure, so that the first inner insulating member and the outer insulating member can be connected through the connecting part, which can improve the installation reliability of the outer insulating member, thereby further improving the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component. Furthermore, the connection between the outer insulating member and the first inner insulating member can further improve the insulation reliability between the clamping structure and the terminal body, thereby reducing short circuit problems and improving the reliability of the battery cell.

[0008] In some embodiments, the clamping structure includes a clamping member, which includes a first clamping portion and a second clamping portion connected together, the first clamping portion and the second clamping portion together forming a clamping groove; a first inner insulating member is at least partially disposed between the first clamping portion and the electrode body; an outer insulating member is disposed on the outer wall of the clamping groove formed by the first clamping portion; and a connecting portion is disposed in the first clamping portion. In the above technical solution, by configuring the clamping structure to include a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion being located on both sides of at least a portion of the electrode body, the movement of the electrode body relative to the clamping structure is restricted. The outer insulating member can isolate the first clamping portion and the busbar component, thereby achieving insulation between the first clamping portion and the busbar component, and between the first shell wall and the busbar component.

[0009] In some embodiments, the connecting portion includes a notch formed at the opening of the clamping groove and located at the end of the first clamping portion away from the second clamping portion. In the above technical solution, by providing a notch at the end of the first clamping portion away from the second clamping portion, it is beneficial to bend the end of the first clamping portion away from the second clamping portion relative to the second clamping portion to form a clamping groove, thereby fixing the pole body to the clamping structure. On the other hand, it allows the outer insulating component and the first inner insulating component to be connected through the notch, improving the installation reliability of the outer insulating component, thereby further improving the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component.

[0010] In some embodiments, the first clamping portion is bent relative to the second clamping portion to form a clamping groove together with the second clamping portion; a notch extends from the end of the first clamping portion away from the second clamping portion to the bending position. In the above technical solution, by setting the notch to extend from the end of the first clamping portion away from the second clamping portion to the bending position, on the one hand, it can reduce problems such as material stacking and wrinkling that occur in the first clamping portion during the bending process, which is conducive to bending the first clamping portion relative to the second clamping portion, thereby fixing the pole body on the clamping structure. On the other hand, the bent first clamping portion can press the first inner insulating member, making the insulation between the pole body and the first clamping portion more reliable.

[0011] In some embodiments, the connecting portion is a through hole with its walls closed on all sides, and the through hole is formed in the first clamping portion. In the above technical solution, by providing a through hole in the first clamping portion, the outer insulating component and the first inner insulating component can be connected through the through hole, thereby improving the installation reliability of the outer insulating component, and thus further improving the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component.

[0012] In some embodiments, the first clamping portion is bent relative to the second clamping portion to form a clamping groove together with the second clamping portion, and the through hole avoids the bending position of the first clamping portion. By avoiding the bending position of the first clamping portion, the deformation at the bending position can reduce the impact of deformation on the shape of the through hole, allowing the outer insulating component and the first inner insulating component to make full contact and connection at the through hole, thereby improving the installation reliability of the outer insulating component.

[0013] In some embodiments, the bending position of the first clamping portion is used to divide the space into two parts: the part closer to the second clamping portion is the first part, and the part farther away from the second clamping portion is the second part. A through hole is provided in the first part. By providing the through hole in the first part of the first clamping portion, the impact of the first clamping portion on the through hole during bending can be reduced, which is beneficial to improving the installation reliability of the outer insulation component. This can further improve the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component.

[0014] In some embodiments, there are multiple connecting portions, which are arranged at intervals around the circumference of the pole body in the first clamping portion. In the above technical solution, by providing multiple connecting portions, the first inner insulating member and the outer insulating member are connected at the locations of the multiple connecting portions, that is, the first inner insulating member and the outer insulating member are connected at multiple locations in the circumference of the pole body. This can further improve the installation reliability of the outer insulating member, thereby significantly improving the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component.

[0015] In some embodiments, the clamping structure is annular, with the connecting portion disposed at any position in the circumference of the first clamping portion around the pole body; or, the clamping structure is elongated, including straight segments and curved segments, with the connecting portion at least at the intersection of the straight segments and the curved segments. In the above technical solutions, when the clamping structure is annular, the connecting portion can be disposed at any position in the circumference of the first clamping portion around the pole body, offering greater flexibility and improving the connection reliability between the first inner insulation component and the outer insulation component, thereby improving the installation reliability of the outer insulation component. When the clamping structure is elongated, disposing of the connecting portion at the intersection of the straight segments and the curved segments reduces the impact of bending of the first clamping portion on the dimensions of the connecting portion and allows for more connecting portions to be provided in the straight segments, thereby improving the installation reliability of the outer insulation component and further enhancing the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component.

[0016] In some embodiments, the clamping structure further includes a body portion, with a first clamping portion and a second clamping portion disposed on the body portion, and the body portion connected to the first shell wall. The body portion has a simple structure; by providing the body portion, it can be positioned between the clamping member and the first shell wall, thereby fixing the clamping member to the first shell wall.

[0017] In some embodiments, the body and the clamping member are integrally formed; or, the body, the clamping member, and the first shell wall are integrally formed. Integrating the body and the clamping member not only eliminates the connection steps between them, improving production efficiency, but also increases the structural strength of the clamping structure, thus enhancing its reliability. Similarly, integrating the body, the clamping member, and the first shell wall eliminates the connection steps between them, improving production efficiency, and also increases the structural strength of the first shell wall and the clamping structure, thus enhancing their reliability.

[0018] In some embodiments, the body portion is welded to the first shell wall. In the above technical solution, by welding the body portion to the first shell wall, the assembly steps of the clamping structure, the pole body, the first inner insulating component, the outer insulating component, and the first shell wall can be simplified, which is beneficial to improving production efficiency.

[0019] In some embodiments, the body portion and the first shell wall have unequal thicknesses; and / or, the first clamping portion and the second clamping portion have unequal thicknesses; and / or, at least one of the first clamping portion and the second clamping portion has unequal thicknesses to the body portion; and / or, at least one of the first clamping portion and the second clamping portion has unequal thicknesses to the first shell wall. In the above technical solution, the insulation performance and reliability of the pole piece can be improved as needed by adjusting the thickness of the first shell wall, the thickness of the first clamping portion of the clamping structure, the thickness of the second clamping portion, and the thickness of the body portion.

[0020] In some embodiments, the surface of the outer insulating member facing away from the first clamping portion is smoothly connected to the end face of the terminal body facing away from the electrode component. This configuration simplifies the external structure of the battery cell, making it more aesthetically pleasing, and also reduces the blocking effect of the outer insulating member on the busbar component, thereby improving the connection reliability between the terminal body and the busbar component.

[0021] In some embodiments, the periphery of the end face of the electrode body facing away from the electrode component has a step, and the outer insulating member extends at least partially to the step. In the above technical solution, by providing a step on the electrode body, the contact area between the outer insulating member and the electrode body can be increased, thereby increasing the connection reliability between the outer insulating member and the electrode body, making the insulation reliability between the bus component and the clamping structure higher, and the outer insulating member is connected to the first inner insulating member, which can completely separate the electrode body and the clamping structure, making the insulation reliability between the electrode body and the clamping structure higher.

[0022] In some embodiments, the step is an annular structure, and the outer insulating member surrounds the first clamping portion. By setting the step as an annular structure, the contact area between the outer insulating member and the electrode body can be further increased, thereby increasing the connection reliability between the outer insulating member and the electrode body, and making the insulation reliability between the busbar component and the clamping structure higher.

[0023] In some embodiments, the first clamping portion includes a first extension section, a second extension section, and an arc-shaped extension section. The first extension section is arranged around the periphery of the electrode body and connected to the second clamping portion. The second extension section is located on the side of the electrode body away from the electrode component and is arranged at a distance from the second clamping portion. The first extension section and the second extension section are connected by the arc-shaped extension section. The outer insulating member includes a first insulating section, a second insulating section, and an arc-shaped insulating section. The first insulating section covers the side of the first extension section away from the electrode body, and the second insulating section covers the side of the second extension section away from the electrode body. The first insulating section and the second insulating section are connected by the arc-shaped insulating section. In the above technical solution, by setting the first clamping portion to include the first extension section, the second extension section, and the arc-shaped extension section, and setting the outer insulating member to include the first insulating section, the second insulating section, and the arc-shaped insulating section, damage to the outer insulating member by the electrode body is reduced, thereby improving the insulation reliability of the outer insulating member.

[0024] In some embodiments, there are multiple second extension segments, which are arranged circumferentially spaced around the pole body, with adjacent second extension segments defining at least a partial connection. In the above technical solution, by configuring the first clamping portion to include multiple second extension segments and defining a connection between adjacent second extension segments, problems such as material stacking and wrinkling during the bending process of the first clamping portion can be reduced, facilitating the bending of the first clamping portion relative to the second clamping portions, thereby fixing the pole body onto the clamping structure. Furthermore, the bent first clamping portion can press against the first inner insulating member, making the insulation between the pole body and the first clamping portion more reliable.

[0025] In some embodiments, the surface of the second insulating section facing away from the second extension section is on the same plane as the end face of the electrode body facing away from the electrode component. This arrangement allows the end face of the electrode component facing away from the electrode component to be flatter, reducing interference between the electrode component and other components outside the housing (such as busbar components), and improving the reliability of the battery cell.

[0026] In some embodiments, the peripheral side of the electrode body has a flange portion, and in the thickness direction of the first shell wall, the flange portion is located between the first clamping portion and the second clamping portion, and the first inner insulating member is at least partially located between the first clamping portion and the flange portion. In the above technical solution, by providing a flange portion on the peripheral side of the electrode body, and the first clamping portion and the second clamping portion being located on both sides of the flange portion in the thickness direction of the first shell wall, the movement of the electrode body relative to the clamping structure toward the direction away from or toward the electrode component is restricted. The structure of the flange portion is simple and easy to process. By clamping the first inner insulating member between the first clamping portion and the flange portion, it is beneficial to insulate the mating position of the clamping structure and the electrode body with a shorter path, thereby improving the reliability of the insulation. Moreover, it is beneficial to reduce the size of the first inner insulating member, making it easier to clamp, making the insulation performance less prone to failure, and improving the insulation effect.

[0027] In some embodiments, the pole piece further includes a sealing ring disposed between the second clamping portion and the flange portion; or, the pole piece further includes an integrally disposed sealing ring located simultaneously between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion; or, the pole piece further includes a sealing ring and a second inner insulating member, the sealing ring being disposed between the connection position of the first clamping portion and the second clamping portion and the flange portion, and the second inner insulating member being disposed between the second clamping portion at a position away from the first clamping portion and the flange portion. In the above technical solution, by setting a sealing ring between the second clamping part and the flange part, a seal can be achieved between the electrode post body and the clamping structure, giving the electrode post component self-sealing properties, facilitating the installation and mating of the electrode post component with the first shell wall, and saving installation time and cost. By simultaneously setting the integrally formed sealing ring between the first clamping part and the flange part, and between the second clamping part and the flange part, multi-directional and multi-position sealing mating can be achieved, reducing sealing failure and improving the sealing effect of the sealing ring, thereby meeting the required sealing requirements. By using a sealing ring and a second inner insulating component, in conjunction with the first inner insulating component, and by rationally arranging the sealing ring, the first inner insulating component, and the second inner insulating component between the electrode post body and the clamping structure, insulation and sealing failures can be reduced, and the insulation and sealing effect between the electrode post body and the clamping structure can be better improved, thereby improving the reliability of the battery cell.

[0028] In some embodiments, the end face of the electrode post body facing the electrode component is flush with the side surface of the first shell wall facing the electrode component; or the end face of the electrode post body facing the electrode component is located on the side of the side surface of the first shell wall facing the electrode component away from the electrode component. In the above technical solution, by aligning the end face of the electrode post body facing the electrode component with the side surface of the first shell wall facing the electrode component, the assembly of the first shell wall and the electrode post component facing the electrode component is relatively flat, which can reduce the interference of the electrode post component with other components in the shell component and simplify the structure of other components in the shell component; by setting the end face of the electrode post body facing the electrode component to be located on the side surface of the first shell wall facing the electrode component away from the electrode component, the space occupied by the conductive part in the receiving cavity can be reduced, so that the receiving cavity has a larger space to accommodate the active material coating part, which is beneficial to increase the volume of the active material coating part, thereby increasing the energy density of the battery cell.

[0029] In some embodiments, the electrode post body further includes an insulating support disposed on the side of the clamping structure near the electrode component. The electrode post body includes an inner protrusion located in the inner ring region of the insulating support, the inner protrusion protruding towards the inner side of the first shell wall relative to the clamping structure. The surface of the inner protrusion near the electrode component is flush with the surface of the insulating support near the electrode component, or located on the side of the insulating support away from the electrode component. In the above technical solution, by providing an insulating support, insulation can be achieved both between the active material coating of the electrode component and the clamping structure, and between the active material coating of the electrode component and the first shell wall, which is beneficial to improving the reliability of the battery cell.

[0030] In some embodiments, the housing component includes a housing body having an opening at at least one end and a housing cover disposed at the opening; wherein the wall of the housing body opposite the opening is a first housing wall; or, the housing cover is the first housing wall. The structural design of the housing component is flexible, and the placement of the pole component is flexible.

[0031] In some embodiments, a pressure relief device is also included, which is located on the housing component and on the same side or opposite side to the terminal component. By providing a pressure relief device, when the pressure inside the housing component exceeds a preset value, the pressure can be directionally released through the pressure relief device, thereby improving the safety and reliability of the battery cell.

[0032] Secondly, this application provides a battery device including the battery cell described in the above embodiments. In the technical solutions of this application embodiments, by employing the aforementioned battery cell, the performance of the battery device can be improved.

[0033] Thirdly, this application provides an electrical device, including the battery device of the above embodiments. In the technical solutions of this application embodiments, by employing the above-described battery device, the working performance of the electrical device can be improved.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0037] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0038] Figure 3 is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0039] Figure 4 is an exploded view of the structure of the battery cell shown in Figure 3;

[0040] Figure 5 is a top view of a battery cell according to some embodiments of this application;

[0041] Figure 6 is a cross-sectional view along line AA in Figure 5;

[0042] Figure 7 is a schematic diagram of the structure of the terminal component of a battery cell on the first shell wall in some embodiments of this application;

[0043] Figure 8 is a schematic diagram of the structure of the terminal component of a battery cell according to some embodiments of this application;

[0044] Figure 9 is a top view of the pole post component shown in Figure 8;

[0045] Figure 10 is a structural cross-sectional view along line B1-B1 shown in Figure 9;

[0046] Figure 11 is an enlarged view of part C1 shown in Figure 10;

[0047] Figure 12 is an exploded view of the pole post component shown in Figure 8;

[0048] Figure 13 is an enlarged view of part D1 shown in Figure 12;

[0049] Figure 14 is a partially enlarged view of the terminal post component of a battery cell according to some other embodiments of this application;

[0050] Figure 15 is a top view of the terminal post component of a battery cell in some embodiments of this application on the first housing wall;

[0051] Figure 16 is a structural cross-sectional view along line B2-B2 shown in Figure 15;

[0052] Figure 17 is a structural cross-sectional view along line C2-C2 shown in Figure 15;

[0053] Figure 18 is a schematic diagram of the structure of the terminal component of a battery cell according to some other embodiments of this application;

[0054] Figure 19 is a schematic diagram of the structure of the terminal component of a battery cell according to some embodiments of this application;

[0055] Figure 20 is a schematic diagram of the terminal component of a battery cell according to some other embodiments of this application.

[0056] The reference numerals in the detailed embodiments are as follows:

[0057] 1000 vehicles

[0058] Battery assembly 100, housing assembly 101, housing cover 1011, housing 1012, controller 200, motor 300.

[0059] 10 battery cells

[0060] Shell component 1, shell body 11, opening 110, shell cover 12, first shell wall 13, mounting hole 131, second shell wall 14.

[0061] Electrode component 2, active material coating part 21, conductive part 22

[0062] pole post component 3, receiving groove 301,

[0063] The pole post body 31, the step 311, the flange portion 312, and the inner protrusion of the pole post 313.

[0064] Clamping structure 32, clamping groove 3201, connecting portion 3202, notch 3202a, through hole 3202b, body portion 321, clamping member 322, first clamping portion 3221, first extension section 32211, second extension section 32212, arc extension section 32213, second clamping portion 3222.

[0065] The insulating and sealing structure 33 includes an inner insulating component 331, a first inner insulating component 3311, a second inner insulating component 3312, a sealing ring 332, a first sealing part 3321, a second sealing part 3322, and a third sealing part 3323.

[0066] Outer insulating component 34, first insulating section 341, second insulating section 342, arc-shaped insulating section 343.

[0067] 4. Pressure relief device; 5. Insulating membrane; 6. Insulating support. Detailed Implementation

[0068] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0073] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0074] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0075] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0076] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0077] In related technologies, after the terminals of a battery cell are connected to the busbar, when the battery cell is subjected to vibration, collision or other external forces, the busbar may come into direct contact with other structures of the battery cell (such as the casing). Once this happens, a short circuit will be formed, which will not only reduce the reliability of the battery cell, but also cause a huge current to be generated inside the battery cell, which will seriously damage the battery itself and may also cause dangerous situations.

[0078] Therefore, embodiments of this application propose a battery cell that, by providing an outer insulating member on the outer wall of the clamping structure and a connecting portion on the clamping structure, allows the first inner insulating member and the outer insulating member to be connected through the connecting portion. This improves the insulation reliability between the clamping structure and the busbar component, between the first shell wall and the busbar component, and between the clamping structure and the terminal body, thereby improving the reliability of the battery cell in use.

[0079] The battery cells disclosed in this application can be used in electrical devices that use battery devices as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0080] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0081] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0082] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0083] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing assembly 101 and a cell assembly, the cell assembly being housed within the housing assembly 101.

[0084] The housing assembly 101 provides a space for housing the battery cell 10, and can adopt various structures. In some embodiments, the housing assembly 101 may include a housing 1012 and a cover 1011, which cover each other, defining a space for housing the battery cell 10. The housing 1012 may be a hollow structure with one open end, and the cover 1011 may be a plate-like structure, covering the open side of the housing 1012 so that the housing 1012 and the cover 1011 together define the space; alternatively, the housing 1012 and the cover 1011 may both be hollow structures with one open side, with the open side of the cover 1011 covering the open side of the housing 1012. Of course, the housing assembly 101 formed by the housing 1012 and the cover 1011 can be of various shapes, such as a cylinder, a cuboid, etc.

[0085] The battery cell assembly may include multiple battery cells 10, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that some of the battery cells 10 are connected in series and others in parallel. The multiple battery cells 10 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 10 is housed within a housing assembly 101. Alternatively, the battery device 100 can also be composed of multiple battery cells 10 first connected in series, parallel, or in a mixed manner to form a battery device 100 module, and then these modules are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the housing assembly 101. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 10.

[0086] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0087] Please refer to Figures 3-6. Figure 3 is a schematic diagram of the structure of a battery cell 10 according to some embodiments of this application; Figure 4 is an exploded view of the structure of the battery cell 10 shown in Figure 3; Figure 5 is a top view of the battery cell 10 according to some embodiments of this application; and Figure 6 is a cross-sectional view along line AA in Figure 5. The battery cell 10 includes a housing component 1, an electrode component 2, a terminal component 3, and other functional components.

[0088] The housing component 1 has a receiving cavity. The housing component 1 includes a cover 12 and a body 11, which together form the receiving cavity. As shown in Figure 3, the X direction is the length direction of the housing component 1, the Y direction is the thickness direction of the housing component 1, and the Z direction is the height direction of the housing component 1.

[0089] The cover 12 refers to a component that covers the opening 110 of the housing 11 to isolate the internal environment of the battery cell 10 from the external environment. The shape of the cover 12 can be adapted to the shape of the housing 11 to fit it. Optionally, the cover 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover 12 is less prone to deformation under pressure and impact, allowing the battery cell 10 to have higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on the cover 12. The electrode terminals can be used to electrically connect with the electrode component 2 for outputting or inputting electrical energy into the battery cell 10. In some embodiments, the cover 12 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The material of the cover 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this.

[0090] The housing 11 is a component used to cooperate with the cover 12 to form the internal environment of the battery cell 10. This internal environment can accommodate the electrode components 2, electrolyte, and other components. The housing 11 and cover 12 can be independent components. An opening 110 can be provided on the housing 11, and the cover 12 can close the opening 110 to form the internal environment of the battery cell 10. Alternatively, the cover 12 and housing 11 can be integrated. Specifically, the cover 12 and housing 11 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 11, the cover 12 closes the housing 11. The housing 11 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 11 can be determined according to the specific shape and size of the electrode components 2. The material of the housing 11 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0091] Electrode component 2 is the component in the battery cell 10 where the electrochemical reaction occurs, and it is housed within the casing component 1. Specifically, the casing 11 may contain one or more electrode components 2. The electrode component 2 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode component 2, while the portions of the positive and negative electrode sheets without active material each constitute a tab. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current circuit.

[0092] According to some embodiments of this application, referring to Figures 4 and 6, and further referring to Figure 7, Figure 7 is a structural schematic diagram of the terminal post component 3 of the battery cell 10 in some embodiments of this application on the first housing wall 13. The housing component 1 includes the first housing wall 13, which participates in forming a receiving cavity, and the material of the first housing wall 13 is not limited.

[0093] Electrode component 2 is housed within housing component 1. For example, electrode component 2 includes an active material coating portion 21 and a conductive portion 22. The active material coating portion 21 is housed in a receiving cavity, and the conductive portion 22 is connected to the active material coating portion 21. The conductive portion 22 may include tabs, and the tabs include multiple layers of tab sheets.

[0094] The electrode post 3 is disposed on the first housing wall 13, and the electrode post body 31 is connected to the electrode post 2. For example, a mounting hole 131 may be formed on the first housing wall 13, the electrode post 3 is disposed at the mounting hole 131, and the electrode post 3 is connected to the electrode post 2, thereby sealing the mounting hole 131. For example, the first housing wall 13 may be integrally formed with at least a portion of the structure of the electrode post 3.

[0095] Please refer to Figures 8-11. Figure 8 is a structural schematic diagram of the terminal post component 3 of the battery cell 10 according to some embodiments of this application; Figure 9 is a top view of the terminal post component 3 shown in Figure 8; Figure 10 is a structural cross-sectional view along line B1-B1 shown in Figure 9; Figure 11 is an enlarged view of part C1 shown in Figure 10. The terminal post component 3 includes a terminal post body 31 and a clamping structure 32. The terminal post body 31 is connected to the electrode component 2, and the clamping structure 32 is connected to the first shell wall 13. The clamping structure 32 has a clamping groove 3201 for clamping the terminal post body 31, thereby fixing the terminal post body 31 onto the clamping structure 32. The shapes of the clamping structure 32 and the terminal post body 31 are not limited. For example, either one can be processed into a circle, ellipse, rectangle, rectangle with rounded corners, etc.

[0096] Referring again to Figures 10 and 11, the pole piece 3 also includes a first inner insulating member 3311. The first inner insulating member 3311 is located within the clamping groove 3201, and is situated between the inner wall of the clamping structure 32 and the pole piece body 31. In other words, the first inner insulating member 3311 is clamped between the pole piece body 31 and the groove wall of the clamping groove 3201, achieving insulation between the pole piece body 31 and the clamping structure 32. This gives the pole piece 3 itself self-insulating properties, facilitating the installation and mating of the pole piece 3 with the first shell wall 13, and saving installation time and costs.

[0097] Furthermore, the pole component 3 also includes an outer insulating member 34, which is separately disposed from the first inner insulating member 3311. The outer insulating member 34 at least partially covers the outer wall of the clamping structure 32. The pole body 31 can be electrically connected to the busbar component. The outer insulating member 34 can separate the clamping structure 32 and the busbar component, thus insulating the clamping structure 32 and the busbar component, and the first shell wall 13 and the busbar component.

[0098] Depending on the matching requirements with the pole body 31 and the clamping structure 32, the first inner insulating part 3311 and the outer insulating part 34 can be set as basically incompressible insulating parts without sealing effect (e.g., plastic parts), or the first inner insulating part 3311 and the outer insulating part 34 can be set as compressible insulating parts with sealing effect (e.g., elastic rubber parts), thereby meeting different practical requirements.

[0099] Please refer to Figures 12-14. Figure 12 is an exploded view of the terminal post component 3 shown in Figure 8; Figure 13 is an enlarged view of part D1 shown in Figure 12; Figure 14 is a partial enlarged view of the terminal post component 3 of the battery cell 10 in some other embodiments of this application. A connecting portion 3202 is provided on the clamping structure 32, through which the first inner insulating member 3311 and the outer insulating member 34 are connected. That is, a portion of the structure of the first inner insulating member 3311 and / or a portion of the structure of the outer insulating member 34 extends into the connecting portion 3202, thereby connecting the two.

[0100] For example, after the first shell wall 13 is assembled with the pole member 3 (excluding the outer insulation member 34), the assembly can be placed in a mold, and then a melt for forming the outer insulation member 34 is injected into the mold. The melt can be fused together with the first inner insulation member 3311 through the connecting part 3202. After the melt solidifies, the outer insulation member 34 is formed, and the outer insulation member 34 is connected to the first inner insulation member 3311.

[0101] For example, the outer insulating member 34 can also be a pre-formed structure. After the first shell wall 13 is assembled with the pole member 3 after removing the outer insulating member 34, the outer insulating member 34 can be attached to the outer wall of the clamping structure 32 forming the clamping groove 3201. The outer insulating member 34 can partially contact or connect with the first inner insulating member 3311 through the connecting part 3202.

[0102] In the technical solution of this application embodiment, the outer insulating member 34 at least partially covers the outer wall of the clamping structure 32, so that the outer insulating member 34 can separate the clamping structure 32 and the busbar component, thereby achieving insulation between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component. A connecting part 3202 is provided on the clamping structure 32, so that the first inner insulating member 3311 and the outer insulating member 34 can be connected through the connecting part 3202, which can improve the installation reliability of the outer insulating member 34, thereby further improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component. Furthermore, the connection between the outer insulating member 34 and the first inner insulating member 3311 can further improve the insulation reliability between the clamping structure 32 and the terminal body 31, thereby reducing short circuit problems and improving the reliability of the battery cell 10.

[0103] Please refer to Figures 10 and 11 again. The clamping structure 32 includes a clamping member 322. The clamping member 322 includes a first clamping part 3221 and a second clamping part 3222 connected together. The first clamping part 3221 and the second clamping part 3222 together form a clamping groove 3201.

[0104] Specifically, the first clamping part 3221 can be located on the side of the second clamping part 3222 away from the electrode component 2, and the electrode body 31 extends into the clamping groove 3201. The first clamping part 3221 can restrict the movement of the electrode body 31 relative to the clamping structure 32 in the direction away from the electrode component 2, and the second clamping part 3222 can restrict the movement of the electrode body 31 relative to the clamping structure 32 in the direction closer to the electrode component 2.

[0105] The first inner insulating member 3311 is at least partially disposed between the first clamping portion 3221 and the pole body 31, thereby achieving insulation between the first clamping portion 3221 and the pole body 31 of the clamping structure 32. For example, the first inner insulating member 3311 may be entirely disposed between the first clamping portion 3221 and the pole body 31. For example, a portion of the first inner insulating member 3311 may be disposed between the first clamping portion 3221 and the pole body 31, and another portion of the first inner insulating member 3311 may be disposed between the second clamping portion 3222 and the pole body 31.

[0106] Furthermore, the outer insulating member 34 can be disposed on the outer wall of the clamping groove 3201 formed by the first clamping part 3221, and the connecting part 3202 is disposed on the first clamping part 3221. That is, the outer insulating member 34 can be disposed on the side of the first clamping part 3221 away from the clamping groove 3201, and the connecting part 3202 connects the clamping groove 3201 and the space where the side of the first clamping part 3221 away from the clamping groove 3201 is located, so that the first inner insulating member 3311 and the outer insulating member 34 can be connected through the connecting part 3202 on the first clamping part 3221.

[0107] In the above technical solution, by setting the clamping structure 32 to include a first clamping part 3221 and a second clamping part 3222, the first clamping part 3221 and the second clamping part 3222 are respectively located on both sides of at least part of the pole body 31, so as to restrict the movement of the pole body 31 relative to the clamping structure 32. The outer insulating member 34 can isolate the first clamping part 3221 and the busbar component, thereby achieving insulation between the first clamping part 3221 and the busbar component, and between the first shell wall 13 and the busbar component.

[0108] In this design, a gap may exist between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the outer periphery of the pole body 31, and the first inner insulating member 3311 and the outer insulating member 34 may be connected at this gap. For example, a portion of the first inner insulating member 3311 extends into the gap between the first clamping portion 3221 and the pole body 31, so that the first inner insulating member 3311 is connected to the outer insulating member 34. Similarly, a portion of the outer insulating member 34 extends into the gap between the first clamping portion 3221 and the pole body 31, so that the first inner insulating member 3311 is connected to the outer insulating member 34.

[0109] Referring again to Figures 12 and 13, in some embodiments, the connecting portion 3202 includes a notch 3202a, which is formed at the opening of the clamping groove 3201 and is located at the end of the first clamping portion 3221 away from the second clamping portion 3222. There can be multiple notches 3202a, which are spaced apart around the pole body 31 of the first clamping portion 3221.

[0110] In the above technical solution, by providing a notch 3202a at the end of the first clamping part 3221 away from the second clamping part 3222, it is beneficial to bend the end of the first clamping part 3221 away from the second clamping part 3222 relative to the second clamping part 3222 to form a clamping groove 3201, so that the pole body 31 is fixed on the clamping structure 32. On the other hand, it can connect the outer insulating member 34 and the first inner insulating member 3311 through the notch 3202a, thereby improving the installation reliability of the outer insulating member 34, and thus further improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0111] In some embodiments, the first clamping portion 3221 is bent relative to the second clamping portion 3222 to form a clamping groove 3201 together with the second clamping portion 3222, and a notch 3202a extends from the end of the first clamping portion 3221 away from the second clamping portion 3222 to the bent position.

[0112] Specifically, the first clamping part 3221 includes a first extension section 32211, a second extension section 32212, and an arc-shaped extension section 32213. The first extension section 32211 is arranged around the periphery of the electrode body 31 and is connected to the second clamping part 3222. The second extension section 32212 is located on the side of the electrode body 31 away from the electrode component 2 and is arranged at a distance from the second clamping part 3222. The first extension section 32211 and the second extension section 32212 are connected by an arc-shaped transition section, which is the bending position of the first clamping part 3221. The notch 3202a can be extended from the end of the second extension section 32212 away from the first extension section 32211 to the arc-shaped transition section.

[0113] In the above technical solution, by setting the notch 3202a to extend from the end of the first clamping part 3221 away from the second clamping part 3222 to the bending position, on the one hand, it can reduce the problems of material stacking and wrinkling that occur in the first clamping part 3221 during the bending process, which is conducive to bending the first clamping part 3221 relative to the second clamping part 3222, thereby fixing the pole body 31 on the clamping structure 32. On the other hand, the bent first clamping part 3221 can press the first inner insulating member 3311, making the insulation between the pole body 31 and the first clamping part 3221 more reliable.

[0114] Referring again to Figure 14, in some embodiments, the connecting portion 3202 is a through hole 3202b with its walls closed on all sides. The through hole 3202b is formed in the first clamping portion 3221, that is, the through hole 3202b penetrates the first clamping portion 3221 to form the inner and outer walls of the clamping groove 3201. There can be multiple through holes 3202b, which are spaced apart around the circumference of the pole body 31 in the first clamping portion 3221. The through holes 3202b can be round holes, square holes, etc.

[0115] In the above technical solution, by providing a through hole 3202b on the first clamping part 3221, the outer insulating part 34 and the first inner insulating part 3311 can be connected through the through hole 3202b, thereby improving the installation reliability of the outer insulating part 34, and thus further improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0116] In some embodiments, the first clamping portion 3221 is bent relative to the second clamping portion 3222 to form a clamping groove 3201 together with the second clamping portion 3222, and the through hole 3202b avoids the position where the first clamping portion 3221 is bent.

[0117] The through hole 3202b can be machined before the first clamping part 3221 is bent. Since the material at the bending position of the first clamping part 3221 after machining the through hole 3202b undergoes significant deformation due to compression or stretching during the bending process, in order to reduce the impact of deformation at the bending position on the shape change of the through hole 3202b, the through hole 3202b needs to be avoided at the bending position of the first clamping part 3221. This allows the outer insulating part 34 and the first inner insulating part 3311 to make full contact and connect at the through hole 3202b, thereby improving the installation reliability of the outer insulating part 34.

[0118] Please refer to Figure 14 again. In some embodiments, the first clamping portion 3221 is divided into two parts based on the bending position of the first clamping portion 3221 (such as the arc extension 32213 mentioned above). The part closer to the second clamping portion 3222 is the first part (such as the first extension 32211 mentioned above), and the part farther away from the second clamping portion 3222 is the second part (such as the second extension 32212 mentioned above). The through hole 3202b is provided in the first part.

[0119] After bending, the first clamping part 3221 deforms the least, or even almost not at all, while the bending position of the first clamping part 3221 and the second part may have problems such as material stacking and wrinkles. That is, the bending position of the first clamping part 3221 and the second part deform more than the first part, which makes it difficult to meet the design requirements.

[0120] Therefore, by setting the through hole 3202b in the first part of the first clamping part 3221, the influence of the first clamping part 3221 on the through hole 3202b during bending can be reduced, which is beneficial to improving the installation reliability of the outer insulating part 34, thereby further improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0121] Please refer to Figure 12 again. In some embodiments, there are multiple connecting portions 3202, and the multiple connecting portions 3202 are arranged at intervals around the pole body 31 around the first clamping portion 3221.

[0122] The positions of the multiple connecting portions 3202 can be selected according to the shapes of the pole post body 31 and the clamping structure 32. For example, if the pole post body 31 and the clamping structure 32 are circular, the multiple connecting portions 3202 can be arranged evenly and at intervals around the circumference of the pole post body 31. For example, if the pole post body 31 and the clamping structure 32 are rectangular, rectangular with rounded corners, etc., the multiple connecting portions 3202 can be symmetrically distributed at the positions of the two long sides of the pole post body 31.

[0123] In the above technical solution, by setting multiple connecting parts 3202, the first inner insulating member 3311 and the outer insulating member 34 are connected at the locations of the multiple connecting parts 3202, that is, the first inner insulating member 3311 and the outer insulating member 34 are connected at multiple locations in the circumferential direction of the pole body 31, which can further improve the installation reliability of the outer insulating member 34, thereby greatly improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0124] In some embodiments, the clamping structure 32 is annular, and the connecting portion 3202 is disposed at any position in the circumference of the first clamping portion 3221 around the pole body 31.

[0125] Since the clamping structure 32 is annular, during the bending process of the first clamping part 3221 relative to the second clamping part 3222, the deformation degree of the first clamping part 3221 at different positions in the circumferential direction around the pole body 31 is relatively uniform. Therefore, if the connecting part 3202 is set at different positions in the circumferential direction around the pole body 31 of the first clamping part 3221, the size change of the connecting part 3202 is almost the same.

[0126] Therefore, in the above technical solution, when the clamping structure 32 is in the shape of a ring, the connecting part 3202 can be set at any position in the circumference of the first clamping part 3221 around the pole body 31, which makes the selection more flexible and can also improve the connection reliability of the first inner insulating member 3311 and the outer insulating member 34, thereby improving the installation reliability of the outer insulating member 34.

[0127] Please refer to Figure 12 again. In some other embodiments, the clamping structure 32 is elongated and includes a straight segment and an arc segment. The connecting portion 3202 is at least located at the intersection of the straight segment and the arc segment.

[0128] Since the clamping structure 32 is elongated, during the bending process of the first clamping part 3221 relative to the second clamping part 3222, problems such as material stacking and wrinkling may occur at the location of the arc segment of the first clamping part 3221. That is, the deformation of the first clamping part 3221 at the location of the arc segment is relatively large. Therefore, if the connecting part 3202 is set at the location of the arc segment, it may cause a large change in the size of the connecting part 3202, which may be difficult to meet the design requirements.

[0129] Therefore, in the above technical solution, the connecting part 3202 is set at the junction of the straight segment and the arc segment. This can reduce the impact of the first clamping part 3221 on the size of the connecting part 3202 when it is bent, and more connecting parts 3202 can be set in the straight segment. This can improve the installation reliability of the outer insulating part 34, and further improve the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0130] Specifically, the clamping structure 32 is an elongated ring structure, comprising two straight segments and two curved segments. The two curved segments are arranged opposite each other, with one curved segment connecting one end of the two straight segments and the other curved segment connecting the other end of the two straight segments. A connecting portion 3202 can be provided at the junction of adjacent straight segments and curved segments. For example, a connecting portion 3202 can be provided at the junction of each end of the straight segment and the two curved segments, meaning that at least four connecting portions 3202 can be provided on the first clamping portion 3221.

[0131] Of course, the number of connecting parts 3202 and the placement of each connecting part 3202 can be selected according to the length of the straight segment. For example, if the length of the straight segment is relatively long, in addition to setting the connecting part 3202 at the junction of the straight segment and the arc segment, one or more connecting parts 3202 can be set at the middle position of the straight segment, so that the outer insulating member 34 and the first inner insulating member 3311 are connected at the positions of more connecting parts 3202, thereby improving the connection reliability of the outer insulating member 34 and the first inner insulating member 3311, and thus improving the installation reliability of the outer insulating member 34.

[0132] Please refer to Figures 10 and 11 again. In some embodiments, the clamping structure 32 further includes a body portion 321, with the clamping member 322 disposed on the body portion 321, and the body portion 321 connected to the first shell wall 13.

[0133] Specifically, the first clamping part 3221 and the second clamping part 3222 are disposed on the body part 321. For example, the body part 321 can be a ring structure, and the body part 321 is disposed around the clamping member 322. More specifically, the first clamping part 3221 and the second clamping part 3222 can both be ring structures, the second clamping part 3222 is located inside the body part 321, and the first clamping part 3221 is located on the side of the second clamping part 3222 that is away from the electrode member 2 and is connected to the body part 321.

[0134] Therefore, the structure of the main body 321 is simple. By setting the main body 321, the main body 321 can be placed between the clamping member 322 and the first shell wall 13, so that the clamping member 322 is fixed on the first shell wall 13.

[0135] Please refer to Figures 15-17. Figure 15 is a top view of the terminal post 3 of the battery cell 10 in some embodiments of this application on the first housing wall 13; Figure 16 is a structural cross-sectional view along line B2-B2 shown in Figure 15; Figure 17 is a structural cross-sectional view along line C2-C2 shown in Figure 15. In some embodiments, the body portion 321 and the clamping member 322 are integrally disposed. The clamping structure 32 has a simple structure, and the body portion 321 and the clamping member 322 can be constructed as an integrally disposed body portion 321, which not only eliminates the connection steps between the two, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure 32, which is beneficial to improving the reliability of the clamping structure 32.

[0136] Referring again to Figures 15 and 16, in some embodiments, the body portion 321, the clamping member 322, and the first shell wall 13 are integrally formed. That is, the body portion 321 and the clamping member 322 of the clamping structure 32 are integrally formed, and the clamping structure 32 and the first shell wall 13 are integrally formed. By integrally forming the body portion 321, the clamping member 322, and the first shell wall 13, the connection steps between the three can be eliminated, which is beneficial to improving production efficiency. It also improves the structural strength of the first shell wall 13 and the clamping structure 32, thus enhancing their reliability.

[0137] Referring again to Figures 4 and 6, in some embodiments, the body portion 321 is welded to the first shell wall 13. That is, the body portion 321 and the first shell wall 13 are separate components, allowing for independent design of the shape and material of the clamping structure 32 and the first shell wall 13 to meet differentiated design requirements under various working conditions. For example, the body portion 321 and the first shell wall 13 can be connected using laser welding, autogenous welding, or brazing.

[0138] Specifically, the clamping structure 32, the pole body 31, the first inner insulating component 3311 and the outer insulating component 34 can be assembled to form the pole component 3. Then, the assembled pole component 3 can be installed on the first shell wall 13, and the body part 321 of the clamping structure 32 can be welded to the first shell wall 13.

[0139] In the above technical solution, by welding the main body 321 to the first shell wall 13, the assembly steps of the clamping structure 32, the pole body 31, the first inner insulating component 3311, the outer insulating component 34 and the first shell wall 13 can be simplified, which is conducive to improving production efficiency.

[0140] Please refer to Figures 16 and 17 again. In some embodiments, the body portion 321 and the first shell wall 13 have different thicknesses. Specifically, the thickness of the first shell wall 13 is h1, and the thickness of the body portion 321 of the clamping structure 32 is K3. K3 is not equal to h1, and can be flexibly selected according to needs.

[0141] For example, the thickness h1 of the first shell wall 13 can be greater than the thickness K3 of the body portion 321 of the clamping structure 32. This can improve the structural strength of the first shell wall 13, making it less prone to deformation. On the one hand, it can improve the reliability of the first shell wall 13 in supporting the terminal post 3, and on the other hand, it can improve the strength of the connection between the first shell wall 13 and the body portion 321, thereby improving the reliability of the terminal post 3 on the first shell wall 13 and making the battery cell 10 more reliable.

[0142] For example, the thickness h1 of the first shell wall 13 can be reduced, and the thickness K3 of the body portion 321 of the clamping structure 32 can be increased, so that the thickness h1 of the first shell wall 13 is less than the thickness K3 of the body portion 321 of the clamping structure 32. By reducing the thickness h1 of the first shell wall 13, the cost of the first shell wall 13 can be reduced. On the other hand, since the thickness K3 of the body portion 321 of the clamping structure 32 is increased, the structural strength of the clamping structure 32 can be improved, the pressure resistance of the terminal component 3 can be improved, thereby improving the reliability of the terminal component 3. It can also improve the strength of the connection position between the body portion 321 and the first shell wall 13, improving the reliability of the terminal component 3 on the first shell wall 13, and making the reliability of the battery cell 10 higher.

[0143] In some embodiments, the first clamping portion 3221 and the second clamping portion 3222 have different thicknesses. Specifically, the thickness of the first clamping portion 3221 of the clamping structure 32 is K1, and the thickness of the second clamping portion 3222 of the clamping structure 32 is K2. K1 and K2 are not equal, and can be flexibly selected as needed.

[0144] For example, the thickness K1 of the first clamping part 3221 of the clamping structure 32 can be greater than the thickness K2 of the second clamping part 3222 of the clamping structure 32. This can improve the structural strength of the first clamping part 3221, allowing the first clamping part 3221 to press the first inner insulating member 3311, so that the first inner insulating member 3311 can meet the insulation requirements and improve the insulation performance and reliability of the pole component 3.

[0145] For example, the thickness K2 of the second clamping part 3222 of the clamping structure 32 can be greater than the thickness K1 of the first clamping part 3221 of the clamping structure 32, which can improve the structural strength of the second clamping part 3222, thereby improving the support strength of the second clamping part 3222 on the electrode body 31, and making the battery cell 10 more reliable.

[0146] In some embodiments, at least one of the first clamping portion 3221 and the second clamping portion 3222 has a thickness that is not equal to that of the body portion 321. Specifically, the thickness of the first clamping portion 3221 of the clamping structure 32 is K1, the thickness of the second clamping portion 3222 of the clamping structure 32 is K2, and the thickness of the body portion 321 of the clamping structure 32 is K3. K1 and K3 are not equal, and / or K2 and K3 are not equal. The specific choice can be made flexibly as needed.

[0147] For example, the thickness K3 of the body portion 321 of the clamping structure 32 is greater than the thickness K1 of the first clamping portion 3221 and the thickness K2 of the second clamping portion 3222. Specifically, the manufacturing process of the clamping structure 32 can be roughly as follows: the inner side of the annular material of the clamping structure 32 is stamped to form an annular structure with an approximately L-shaped cross-section, and then the inner side of the annular structure is impacted again to reduce the thickness of the inner side of the annular structure, forming an annular structure with an approximately T-shaped cross-section. This forms the body portion 321, the second clamping portion 3222, and the first clamping portion 3221 before bending. The thickness K1 of the first clamping portion 3221 and the thickness K2 of the second clamping portion 3222 formed by stamping are both less than the thickness K3 of the body portion 321.

[0148] The thickness K3 of the body part 321 of the clamping structure 32 is greater than the thickness K1 of the first clamping part 3221 and the thickness K2 of the second clamping part 3222. This can improve the strength of the connection between the body part 321 and the first shell wall 13, enhance the reliability of the pole post component 3 on the first shell wall 13, and make the battery cell 10 more reliable.

[0149] For example, the thickness K2 of the second clamping portion 3222 of the clamping structure 32 is greater than the thickness K1 of the first clamping portion 3221 and the thickness K3 of the body portion 321. Specifically, the manufacturing process of the clamping structure 32 can be roughly as follows: the outer side of the annular material of the clamping structure 32 is stamped to form an annular structure with an approximately L-shaped cross section, and then the outer side of the annular structure is impacted again to reduce the thickness of the outer side of the annular structure, forming an annular structure with an approximately T-shaped cross section. This forms the body portion 321, the second clamping portion 3222, and the first clamping portion 3221 before bending. The thickness K3 of the body portion 321 and the thickness K1 of the first clamping portion 3221 formed by stamping are both less than the thickness K2 of the second clamping portion 3222.

[0150] The thickness K2 of the second clamping part 3222 of the clamping structure 32 is greater than the thickness K1 of the first clamping part 3221 and the thickness K3 of the body part 321. This can improve the structural strength of the second clamping part 3222, thereby improving the support strength of the second clamping part 3222 on the electrode body 31 and making the battery cell 10 more reliable.

[0151] In some embodiments, at least one of the first clamping portion 3221 and the second clamping portion 3222 has a thickness that is not equal to that of the first shell wall 13. Specifically, the thickness of the first clamping portion 3221 of the clamping structure 32 is K1, the thickness of the second clamping portion 3222 of the clamping structure 32 is K2, and the thickness of the first shell wall 13 is h1, where K1 and h1 are not equal; and / or, K2 and h1 are not equal, and the specific choice can be made flexibly as needed.

[0152] For example, the thickness h1 of the first shell wall 13 is greater than the thickness K1 of the first clamping part 3221 and the thickness K2 of the second clamping part 3222. The first shell wall 13 has higher structural strength, which is beneficial to improving the support reliability of the first shell wall 13 for the pole post component 3, and improving the insulation performance and reliability of the pole post component 3.

[0153] For example, the thickness K1 of the first clamping portion 3221 is greater than the thickness h1 of the first shell wall 13, and the thickness K2 of the second clamping portion 3222 is less than the thickness h1 of the first shell wall 13.

[0154] In summary, in the above technical solution, the insulation performance and reliability of the pole piece 3 can be improved by adjusting the thickness of the first shell wall 13, the thickness of the first clamping part 3221 of the clamping structure 32, the thickness of the second clamping part 3222, and the thickness of the body part 321 as needed.

[0155] Referring again to Figures 10 and 11, in some embodiments, the surface of the outer insulating member 34 facing away from the first clamping portion 3221 is smoothly connected to the end face of the pole body 31 facing away from the electrode component 2. That is, the surface of the pole component 3 facing away from the electrode component 2 is relatively flat.

[0156] This design simplifies the external structure of the battery cell 10, making it more aesthetically pleasing, and also reduces the blocking effect of the external insulation component 34 on the current-connecting component, thereby improving the reliability of the connection between the terminal body 31 and the current-connecting component.

[0157] Referring again to Figure 11, in some embodiments, the periphery of the end face of the pole body 31 facing away from the electrode component 2 has a step 311, and the outer insulating member 34 extends at least partially to the step 311.

[0158] For example, step 311 can be a ring-shaped structure. Correspondingly, the end of the outer insulating member 34 away from the second clamping part 3222 has an annular mating part located at step 311. For example, step 311 can be an intermittent step surrounding the pole body 31. Correspondingly, the end of the outer insulating member 34 away from the second clamping part 3222 has an intermittent mating part surrounding the pole body 31 to mate with the intermittent step.

[0159] Furthermore, the surface of the outer insulating member 34 extending onto the step 311 is flush with the end face of the pole body 31 facing away from the electrode component 2, thereby improving the connection reliability between the pole body 31 and the busbar component.

[0160] In the above technical solution, by setting a step 311 on the pole body 31, the contact area between the outer insulating member 34 and the pole body 31 can be increased, thereby increasing the connection reliability between the outer insulating member 34 and the pole body 31, making the insulation reliability between the busbar component and the clamping structure 32 higher. Furthermore, the outer insulating member 34 is connected to the first inner insulating member 3311, which can completely separate the pole body 31 and the clamping structure 32, making the insulation reliability between the pole body 31 and the clamping structure 32 higher.

[0161] In some embodiments, the step 311 is an annular structure, and the outer insulating member 34 is disposed around the first clamping portion 3221. By setting the step 311 as an annular structure, the contact area between the outer insulating member 34 and the pole body 31 can be further increased, thereby increasing the connection reliability between the outer insulating member 34 and the pole body 31, and making the insulation reliability between the busbar component and the clamping structure 32 higher.

[0162] Referring again to Figure 11, in some embodiments, the first clamping portion 3221 includes a first extension 32211, a second extension 32212, and an arc-shaped extension 32213. The first extension 32211 is arranged around the periphery of the electrode body 31 and is connected to the second clamping portion 3222. The second extension 32212 is located on the side of the electrode body 31 away from the electrode component 2 and is arranged at a distance from the second clamping portion 3222. The first extension 32211 and the second extension 32212 are connected by an arc-shaped transition section.

[0163] The outer insulating member 34 includes a first insulating section 341, a second insulating section 342, and an arc-shaped insulating section 343. The first insulating section 341 covers the side of the first extension section 32211 that is away from the pole body 31, and the second insulating section 342 covers the side of the second extension section 32212 that is away from the pole body 31. The first insulating section 341 and the second insulating section 342 are connected by the arc-shaped insulating section 343.

[0164] In the above technical solution, by configuring the first clamping part 3221 to include a first extension section 32211, a second extension section 32212 and an arc extension section 32213, and configuring the outer insulating member 34 to include a first insulating section 341, a second insulating section 342 and an arc insulating section 343, the damage of the pole body 31 to the outer insulating member 34 is reduced, thereby improving the insulation reliability of the outer insulating member 34.

[0165] Please refer to Figure 12 again. In some embodiments, there are multiple second extension segments 32212. Multiple second extension segments 32212 are arranged circumferentially at intervals in the pole body 31, and two adjacent second extension segments 32212 define at least a partial connecting portion 3202.

[0166] For example, when assembling the pole body 31, the clamping structure 32, and the first inner insulation member 3311, the pole body 31, the first inner insulation member 3311, and the clamping structure 32 can be arranged from the inside out. Then, the first clamping part 3221 of the clamping structure 32 is bent relative to the first clamping part 3221, so that a part of the first clamping part 3221 is bent toward the pole body 31 and the first inner insulation member 3311 is pressed, thereby fixing the pole body 31 onto the clamping structure 32 and clamping the first inner insulation member 3311 between the pole body 31 and the clamping structure 32, thereby improving the insulation reliability of the first inner insulation member 3311.

[0167] In the above technical solution, by setting the first clamping part 3221 to include a plurality of second extensions and defining a connecting part 3202 between two adjacent second extensions, on the one hand, the problems of material stacking and wrinkles that occur in the first clamping part 3221 during the bending process can be reduced, which is conducive to bending the first clamping part 3221 relative to the second clamping part 3222, thereby fixing the pole body 31 on the clamping structure 32. On the other hand, the bent first clamping part 3221 can press the first inner insulating member 3311, making the insulation between the pole body 31 and the first clamping part 3221 more reliable.

[0168] Referring again to Figures 10 and 11, in some embodiments, the surface of the second insulating segment 342 facing away from the second extension segment 32212 is on the same plane as the end face of the pole body 31 facing away from the electrode component 2. That is, the surface of the second insulating segment 342 facing away from the second extension segment 32212 and the end face of the pole body 31 facing away from the electrode component 2 are at the same height, and there is no height difference between them.

[0169] When the terminal post 3 of the battery cell 10 is connected to the current collector, the external insulation 34 will not affect the connection reliability between the terminal post body 31 and the current collector while ensuring the insulation effect, which is beneficial to improving the reliability of the battery cell 10.

[0170] Therefore, this configuration allows the end face of the pole piece 3 facing away from the electrode piece 2 to be relatively flat, which can reduce the interference of the pole piece 3 with other components outside the housing piece 1 (such as the busbar component), and improve the reliability of the battery cell 10.

[0171] In other embodiments, the terminal body 31 at least partially protrudes from the side surface of the second insulating section 342 opposite to the terminal body 31. When the terminal component 3 of the battery cell 10 is connected to the busbar component, the outer insulating member 34, while satisfying the insulation effect, will not affect the connection reliability between the terminal body 31 and the busbar component. It can also reduce the interference of the terminal component 3 to other components outside the housing component 1 (such as the busbar component), which is beneficial to improving the reliability of the battery cell 10.

[0172] Referring again to Figures 10, 11, and 17, in some embodiments, the periphery of the pole body 31 has a flange 312, which is located between the first clamping portion 3221 and the second clamping portion 3222 in the thickness direction of the first shell wall 13. The flange 312 can be a structure located on the outer periphery of the pole body 31. For example, the flange 312 can be an annular structure located on the outer periphery of the pole body 31; as another example, the flange 312 can be multiple discontinuous structures located on the outer periphery of the pole body 31.

[0173] Specifically, the side of the flange portion 312 facing away from the electrode component 2 is the outer side of the flange portion 312, and the side of the flange portion 312 close to the electrode component 2 is the inner side of the flange portion 312. In the thickness direction of the first shell wall 13, the first clamping portion 3221 can be at least partially disposed opposite to the outer side of the flange portion 312, and the second clamping portion 3222 can be disposed opposite to the inner side of the flange portion 312, so that the flange portion 312 is located between the first clamping portion 3221 and the second clamping portion 3222, thereby realizing the fixed installation of the electrode post body 31 on the clamping structure 32.

[0174] The first inner insulating member 3311 is located between the first clamping portion 3221 and the flange portion 312. The first inner insulating member 3311 can extend circumferentially around the flange portion 312. The relative position of the first inner insulating member 3311 and the flange portion 312 is not limited. For example, the first inner insulating member 3311 may be at least partially clamped between the outer side of the flange portion 312 (the side of the flange portion 312 away from the electrode component 2) and the first clamping portion 3221; or, the first inner insulating member 3311 may be at least partially clamped between the radially outer side of the flange portion 312 and the first clamping portion 3221; or, at least a portion of the first inner insulating member 3311 may be clamped between the flange portion 312 and the first clamping portion 3221, and at least another portion may be clamped between the inner side of the flange portion 312 (the side of the flange portion 312 near the electrode component 2) and the second clamping portion 3222.

[0175] In the above technical solution, by providing a flange portion 312 on the periphery of the electrode body 31, and the first clamping portion 3221 and the second clamping portion 3222 being located on both sides of the flange portion 312 in the thickness direction of the first shell wall 13, the movement of the electrode body 31 relative to the clamping structure 32 toward the direction away from or toward the electrode component 2 is restricted. The structure of the flange portion 312 is simple and easy to process. By clamping the first inner insulating member 3311 between the first clamping portion 3221 and the flange portion 312, it is beneficial to insulate the mating position of the clamping structure 32 and the electrode body 31 with a shorter path, thereby improving the reliability of the insulation. Moreover, it is beneficial to reduce the size of the first inner insulating member 3311, making it easier to clamp it, so that the insulation performance is less likely to fail and the insulation effect is improved.

[0176] Please refer again to Figure 17, and further to Figure 18, which is a schematic diagram of the structure of the terminal post component of a battery cell according to other embodiments of this application. In some embodiments, the terminal post component 3 further includes a sealing ring 332, which is disposed between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 can be made of a material that has both sealing and insulating properties, such as an elastic rubber component, so that the required sealing requirements can be met by designing the shape and position of the sealing ring 332.

[0177] In the above technical solution, by setting a sealing ring 332 between the second clamping part 3222 and the flange part 312, the sealing between the pole body 31 and the clamping structure 32 can be achieved, so that the pole component 3 itself has self-sealing properties, which facilitates the installation and cooperation between the pole component 3 and the first shell wall 13, and can save installation time and cost.

[0178] For example, when the pole piece 3 is received or after the pole piece 3 is processed, an airtightness test can be performed on the pole piece 3 to determine whether a reliable seal is formed at the connection position between the clamping structure 32 and the pole piece body 31. If the seal is reliable, the pole piece 3 can be connected to the first shell wall 13.

[0179] Please refer to Figure 19, which is a schematic diagram of the structure of the terminal component of a battery cell according to some embodiments of this application. In some embodiments, the terminal component 3 further includes an integrally formed sealing ring 332, which is located between the first clamping portion 3221 and the flange portion 312, and between the second clamping portion 3222 and the flange portion 312.

[0180] For example, the sealing ring 332 may be partially clamped between the first clamping portion 3221 and the flange portion 312 on the side away from the electrode component 2, partially clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, and partially clamped between the second clamping portion 3222 and the flange portion 312 on the side close to the electrode component 2.

[0181] Specifically, as shown in Figure 19, the sealing ring 332 may include a first sealing portion 3321, a second sealing portion 3322, and a third sealing portion 3323 connected together. The second sealing portion 3322 is connected between the first sealing portion 3321 and the third sealing portion 3323. The first sealing portion 3321 is clamped between the second clamping portion 3222 and the side of the flange portion 312 near the electrode component 2. The second sealing portion 3322 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312. The third sealing portion 3323 is clamped between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2. In other words, under the action of the clamping member 322, the sealing ring 332 clamps the side of the flange portion 312 away from the electrode component 2 and the side of the flange portion 312 near the electrode component 2, thereby increasing the compression of the sealing ring 332 and improving reliability.

[0182] In the above technical solution, by simultaneously placing the integrally formed sealing ring 332 between the first clamping part 3221 and the flange part 312, and between the second clamping part 3222 and the flange part 312, multi-directional and multi-position sealing fit can be achieved, reducing sealing failure and improving the sealing effect of the sealing ring 332, thereby meeting the required sealing requirements.

[0183] Please refer to Figure 20 again. Figure 20 is a schematic diagram of the structure of the terminal post component of a battery cell according to some embodiments of this application. In some embodiments, the terminal post component 3 further includes a sealing ring 332 and a second inner insulating member 3312. The sealing ring 332 is disposed between the connection position of the first clamping portion 3221 and the second clamping portion 3222 and the flange portion 312. The second inner insulating member 3312 is disposed between the second clamping portion 3222 at a position away from the first clamping portion 3221 and the flange portion 312. The shape of the sealing ring 332 can be adapted to the connection position of the first clamping portion 3221 and the second clamping portion 3222.

[0184] For example, the first clamping portion 3221 and the second clamping portion 3222 are arranged at an angle. The sealing ring 332 may include the connected first sealing portion 3321 and the second sealing portion 3322. Correspondingly, the first sealing portion 3321 and the second sealing portion 3322 are arranged at an angle. The first sealing portion 3321 is clamped between the second clamping portion 3222 and the side of the flange portion 312 near the electrode component 2. The second sealing portion 3322 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, so that the sealing ring 332 is at least partially located between the connection position of the first clamping portion 3221 and the second clamping portion 3222 and the flange portion 312.

[0185] Since one end of the second clamping part 3222 is connected to the first clamping part 3221, and the other end of the second clamping part 3222 (the end of the second clamping part 3222 away from the first clamping part 3221) is a free end, the second clamping part 3222 can be regarded as a cantilever structure. Therefore, when the pole body 31 is compressed or stretched, the second clamping part 3222 may deform relative to the first shell wall 13. The end of the second clamping part 3222 connected to the first clamping part 3221 (the fixed end of the second clamping part 3222) deforms the most, or even remains unchanged. The end of the second clamping part 3222 away from the first clamping part 3221 (the free end) deforms the most. If the sealing ring 332 is placed between the end of the second clamping part 3222 away from the first clamping part 3221 and the flange part 312, it may affect the sealing effect of the sealing ring 332.

[0186] Therefore, by placing the sealing ring 332 between the connection position of the first clamping part 3221 and the second clamping part 3222 and the flange part 312, that is, placing the sealing ring 332 between the second clamping part 3222 near its fixed end and the flange part 312, the influence of the deformation of the second clamping part 3222 on the sealing effect of the sealing ring 332 when the pole body 31 is compressed or stretched can be reduced, the sealing failure can be reduced, the problem of insufficient compression of the sealing ring 332 can be solved, and the sealing ring 332 can meet the required sealing requirements.

[0187] The second inner insulating member 3312 is disposed between the second clamping part 3222 away from the first clamping part 3221 and the flange part 312, which can realize the insulation between the pole body 31 and the second clamping part 3222, further improving the self-insulation of the pole component 3 itself, facilitating the installation and cooperation between the pole component 3 and the first shell wall 13, and saving installation time and cost.

[0188] For example, after the electrode body 31, clamping structure 32, sealing ring 332, and first inner insulation member 3311 are assembled, the assembly can be placed in a mold, and then a melt for forming the second inner insulation member 3312 is injected into the mold. The melt can fill the space between the second clamping portion 3222 away from the first clamping portion 3221 and the flange portion 312. After the melt solidifies, the second inner insulation member 3312 is formed, and the second inner insulation member 3312 is connected to the sealing ring 332. For example, the second inner insulation member 3312 can also be a pre-formed structure, that is, the electrode body 31, clamping structure 32, sealing ring 332, first inner insulation member 3311, and second inner insulation member 3312 can be directly assembled together.

[0189] Therefore, in the above technical solution, by using a sealing ring 332 and a second inner insulating component 3312, and in conjunction with a first inner insulating component 3311, the sealing ring 332, the first inner insulating component 3311 and the second inner insulating component 3312 are reasonably arranged between the electrode body 31 and the clamping structure 32, which can reduce insulation and sealing failures, better improve the insulation and sealing effect between the electrode body 31 and the clamping structure 32, and thus improve the reliability of the battery cell 10.

[0190] Referring again to Figures 17-19, in some embodiments, the end face of the electrode body 31 facing the electrode component 2 is flush with the side surface of the first shell wall 13 facing the electrode component 2. Here, "flush with" means that the end face and the surface are at the same height, with no height difference between them, that is, the end face of the electrode body 31 facing the electrode component 2 and the side surface of the first shell wall 13 facing the electrode component 2 are on the same plane.

[0191] In the above technical solution, by aligning the end face of the pole body 31 facing the electrode component 2 with the side surface of the first shell wall 13 facing the electrode component 2, the assembly of the first shell wall 13 and the pole component 3 facing the electrode component 2 is relatively flat, which can reduce the interference of the pole component 3 on other components inside the shell component 1 and simplify the structure of other components inside the shell component 1.

[0192] Referring again to Figure 20, in some other embodiments, the end face of the electrode body 31 facing the electrode component 2 is located on the side of the first shell wall 13 facing the electrode component 2 away from the electrode component 2.

[0193] In other words, the distance between the end face of the electrode post body 31 facing the electrode component 2 and the end of the active material coating portion 21 of the electrode component 2 is greater than the distance between the surface of the first shell wall 13 facing the electrode component 2 and the end of the active material coating portion 21 of the electrode component 2. This results in a receiving groove 301 being formed on the side of the assembly of the first shell wall 13 and the electrode post component 3 facing the electrode component 2, and the receiving groove 301 is open in the direction facing the electrode component 2. The receiving groove 301 can be used to accommodate at least a portion of the conductive portion 22 of the electrode component 2. The configuration of the receiving groove 301 is not limited and can be flexibly designed and constructed.

[0194] This configuration defines the receiving groove 301, accommodating at least a portion of the conductive part 22 of the electrode component 2. This reduces the space occupied by the conductive part 22 within the receiving cavity, allowing for a larger space to accommodate the active material coating part 21. This increases the volume of the active material coating part 21, thereby increasing the energy density of the battery cell 10. Furthermore, since the receiving groove 301 is open towards the electrode component 2, the conductive part 22 can easily extend into the receiving groove 301, reducing operational difficulty.

[0195] Please refer to Figure 18 again. The electrode body 31 also includes an insulating support 6. The insulating support 6 is located on the side of the clamping structure 32 near the electrode component 2. The electrode body 31 includes an inner protrusion 313. The inner protrusion 313 is located in the inner ring area of ​​the insulating support 6. The inner protrusion 313 protrudes towards the inner side of the first shell wall 13 relative to the clamping structure 32.

[0196] Among them, the side surface of the inner protrusion 313 of the pole post near the electrode component 2 is flush with the side surface of the insulating bracket 6 near the electrode component 2, that is, the side surface of the inner protrusion 313 of the pole post near the electrode component 2 and the side surface of the insulating bracket 6 near the electrode component 2 are in the same plane.

[0197] Of course, the side surface of the inner protrusion 313 of the electrode post that is close to the electrode component 2 can also be located on the side of the side surface of the insulating support 6 that is close to the electrode component 2 and away from the electrode component 2. That is, the distance between the inner protrusion 313 of the electrode post and one end of the active material coating 21 is greater than the distance between the insulating support 6 and one end of the active material coating 21, so that the inner ring region of the insulating support 6 can accommodate at least a portion of the conductive part 22 of the electrode component 2.

[0198] In the above technical solution, by setting the insulating support 6, insulation can be achieved between the active material coating part 21 of the electrode component 2 and the clamping structure 32, and insulation can also be achieved between the active material coating part 21 of the electrode component 2 and the first shell wall 13, which is beneficial to improving the reliability of the battery cell 10.

[0199] Please refer again to Figures 4 and 6. The structure of the housing component 1 is not limited. For example, the housing component 1 includes a shell body 11 that helps to form the receiving cavity, one end of the shell body 11 having an opening 110, and the end of the shell body 11 opposite to the opening 110 being a first shell wall 13. As another example, referring to Figure 4, the housing component 1 includes a shell cover 12 that helps to form the receiving cavity, and the shell cover 12 is the first shell wall 13. Thus, the structural design of the housing component 1 is flexible, and the placement of the pole component 3 is flexible.

[0200] Referring again to Figures 3, 4, and 6, in some embodiments, the battery cell 10 further includes a pressure relief device 4, which is disposed on the housing component 1. For example, the pressure relief device 4 may be an explosion-proof valve installed on the housing component 1, or it may be integrally formed in a thinned area of ​​the housing component 1. Thus, by providing the pressure relief device 4, when the pressure inside the housing component 1 exceeds a preset value, the pressure can be directionally released through the pressure relief device 4, thereby improving the safety and reliability of the battery cell 10.

[0201] For example, the pressure relief device 4 and the terminal post component 3 are located on the same side. Since the terminal post component 3 is located on the first shell wall 13, when the pressure relief device 4 is also located on the first shell wall 13, the pressure relief device 4 and the terminal post component 3 are located on the same side, for example, both can be located on the top of the battery cell 10, or both can be located on the bottom of the battery cell 10, or both can be located on the same side wall of the battery cell 10, etc. This simplifies the design of the other shell walls besides the first shell wall 13, and simplifies the structure and processing of the battery cell 10. The shell component 1 can be formed by multiple non-coplanar walls. For example, a cuboid shell component 1 is formed by six walls, one of which is the first shell wall 13. By placing the pressure relief device 4 and the terminal post component 3 on the same wall, they are located on the same side.

[0202] For example, the pressure relief device 4 and the pole member 3 are located on opposite sides. Since the pole member 3 is located on the first shell wall 13, when the pressure relief device 4 is located on a wall of the shell member 1 other than the first shell wall 13, for example, the end of the shell body 11 opposite to the opening 110 is the second shell wall 14, and the pressure relief device 4 is located on the second shell wall 14, then the pressure relief device 4 and the pole member 3 are located on opposite sides. Therefore, there is no need to consider the space occupied by the pressure relief device 4 in the first shell wall 13, thus reducing the size of the pole member 3, and the shape and area of ​​the pole member 3 can be flexibly designed as needed. The shell member 1 can be surrounded by multiple non-coplanar walls. For example, a cuboid shell member 1 is surrounded by six walls, one of which is the first shell wall 13. The pressure relief device 4 is located on any other wall other than the first shell wall 13, and the pole member 3 is located on the first shell wall 13, then the two are located on opposite sides.

[0203] Please refer to Figures 4 and 6 again. The battery cell 10 also includes an insulating film 5. The insulating film 5 can wrap the active material coating part 21 to improve the insulation reliability between the active material coating part 21 and the housing component 1, reduce or prevent the active material coating part 21 from contacting the housing component 1 and causing the housing component 1 to be corroded, reduce the leakage of electrolyte caused by the corrosion of the housing component 1, and improve the reliability of the battery cell 10.

[0204] According to some embodiments of this application, this application provides a battery cell 10, including a housing component 1, an electrode component 2, a terminal component 3, a pressure relief device 4, an insulating film 5, and an insulating support 6.

[0205] The housing component 1 includes a housing body 11 and a housing cover 12. The housing cover 12 or the wall of the housing body 11 opposite to the housing cover 12 can be a first housing wall 13. The electrode component 2 is disposed inside the housing component 1, and the electrode post component 3 is disposed on the first housing wall 13 and connected to the conductive part 22 of the electrode component 2.

[0206] The pole component 3 includes a pole body 31, a clamping structure 32, an insulating sealing structure 33, and an outer insulating member 34. The outer periphery of the pole body 31 has a flange portion 312.

[0207] The clamping structure 32 includes a connected body portion 321 and a clamping member 322. The body portion 321 is connected to the first shell wall 13. The clamping member 322 includes a connected first clamping portion 3221 and a second clamping portion 3222. The first clamping portion 3221 is located on the side of the second clamping portion 3222 away from the electrode component 2. A clamping groove 3201 is defined between the first clamping portion 3221 and the second clamping portion 3222. The clamping groove 3201 is used to clamp the flange portion 312. An insulating sealing structure 33 is disposed between the flange portion 312 and the clamping member 322. An outer insulating member 34 covers the side of the first clamping portion 3221 away from the clamping groove 3201 and is connected to the insulating sealing structure 33.

[0208] The insulating sealing structure 33 includes an inner insulating element 331 and a sealing ring 332. The inner insulating element 331 may include a first inner insulating element 3311, or may include a first inner insulating element 3311 and a second inner insulating element 3312.

[0209] For example, as shown in FIG17, the insulating sealing structure 33 may include a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 may be disposed between the clamping member 322 and the flange portion 312. One end of the first inner insulating member 3311 extends between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, and the other end extends between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 is clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0210] For example, as shown in FIG18, the insulating sealing structure 33 may include a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 may be disposed between the clamping member 322 and the pole body 31, with one end of the first inner insulating member 3311 extending between the end of the first clamping part 3221 away from the second clamping part 3222 and the pole body 31, and the other end extending to the radially outer side of the flange part 312. The sealing ring 332 is disposed between the second clamping part 3222 and the flange part 312, with one end of the sealing ring 332 extending to the connection position of the first clamping part 3221 and the second clamping part 3222 or the radially outer side of the flange part 312, and the other end extending between the end of the second clamping part 3222 away from the first clamping part 3221 and the pole body 31.

[0211] For example, as shown in FIG19, the insulating sealing structure 33 may include a first inner insulating member 3311, a sealing ring 332, and a second inner insulating member 3312. The first inner insulating member 3311 is disposed between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the electrode body 31. A portion of the sealing ring 332 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, a portion is clamped between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2, and another portion is clamped between the second clamping portion 3222 and the side of the flange portion 312 facing the electrode component 2. The second inner insulating member 3312 is clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the electrode body 31.

[0212] For example, as shown in FIG20, the insulating sealing structure 33 may include a first inner insulating member 3311, a sealing ring 332, and a second inner insulating member 3312. A portion of the first inner insulating member 3311 is disposed between the first clamping portion 3221 and the flange portion 312 on the side away from the electrode component 2, and another portion is disposed between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the electrode body 31. A portion of the sealing ring 332 is clamped between the first clamping portion 3221 and the flange portion 312 on the radially outer side, and a portion is clamped between the second clamping portion 3222 and the flange portion 312 on the side facing the electrode component 2. The second inner insulating member 3312 is at least partially clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the electrode body 31.

[0213] According to some embodiments of this application, this application also provides a battery device 100, which includes the battery cell 10 described above. It is worth noting that the battery device 100 according to embodiments of this application may or may not include a housing 1012. Therefore, since the reliability of the battery cell 10 according to embodiments of this application is improved, the performance of the battery device 100 is thus enhanced.

[0214] For example, the battery device 100 may further include a busbar, and multiple battery cells 10, at least two of which are electrically connected through the busbar. This allows for the series and / or parallel connection of multiple battery cells 10. For instance, when multiple battery cells 10 are connected in series, the negative terminal 3 of one battery cell 10 is connected to the positive terminal 3 of the next battery cell 10 through a busbar, while the positive terminal 3 of the same battery cell 10 is connected to the negative terminal 3 of the previous battery cell 10 through another busbar.

[0215] According to some embodiments of this application, this application also provides an electrical device including the battery device 100 described above, and the battery device 100 is used to provide electrical energy to the electrical device. The electrical device can be any of the aforementioned devices or systems using the battery device 100. Because the performance of the battery device 100 is improved, it is beneficial to improve the operating performance of the electrical device.

[0216] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, wherein, include: The housing component includes a first housing wall; The electrode components are housed within the housing components; An electrode post component is disposed on the first shell wall and includes an electrode post body, a clamping structure, and a first inner insulating member and an outer insulating member separately disposed therefrom; the electrode post body is connected to the electrode component; the clamping structure is connected to the first shell wall and has a clamping groove for clamping the electrode post body, the first inner insulating member is located in the clamping groove and between the inner wall of the clamping structure and the electrode post body, and the outer insulating member at least partially covers the outer wall of the clamping structure; The clamping structure has a connecting portion, through which the first inner insulating member and the outer insulating member are connected.

2. The battery cell according to claim 1, wherein, The clamping structure includes a clamping member, which includes a first clamping part and a second clamping part connected together, the first clamping part and the second clamping part together forming the clamping groove; The first inner insulating member is at least partially disposed between the first clamping portion and the pole body; the outer insulating member is disposed on the outer wall of the clamping portion forming the clamping groove; the connecting portion is disposed in the first clamping portion.

3. The battery cell according to claim 2, wherein, The connecting portion includes a notch formed at the opening of the clamping groove and located at the end of the first clamping portion away from the second clamping portion.

4. The battery cell according to claim 3, wherein, The first clamping part is bent relative to the second clamping part to form the clamping groove together with the second clamping part; The notch extends from the end of the first clamping portion away from the second clamping portion to the bent position.

5. The battery cell according to claim 2, wherein, The connecting part is a through hole with its walls closed on all sides, and the through hole is opened in the first clamping part.

6. The battery cell according to claim 5, wherein, The first clamping part is bent relative to the second clamping part to form the clamping groove together with the second clamping part, and the through hole avoids the position where the first clamping part is bent.

7. The battery cell according to claim 6, wherein, The first clamping part is divided into two parts based on the bending position of the first clamping part. The part closer to the second clamping part is the first part, and the part farther away from the second clamping part is the second part. The through hole is provided in the first part.

8. The battery cell according to any one of claims 2-7, wherein, The number of the connecting parts is multiple, and the multiple connecting parts are arranged at intervals around the pole body in the first clamping part.

9. The battery cell according to any one of claims 2-7, wherein, The clamping structure is annular, and the connecting part is located at any position in the circumference of the first clamping part around the pole body; Alternatively, the clamping structure is elongated and includes straight segments and curved segments, with the connecting portion at least located at the intersection of the straight segments and the curved segments.

10. The battery cell according to any one of claims 2-7, wherein, The clamping structure further includes a body portion, wherein the first clamping portion and the second clamping portion are disposed on the body portion, and the body portion is connected to the first shell wall.

11. The battery cell according to claim 10, wherein, The main body and the clamping member are integrally formed; or, the main body, the clamping member, and the first shell wall are integrally formed.

12. The battery cell according to claim 10, wherein, The main body is welded to the first shell wall.

13. The battery cell according to claim 10, wherein, The body portion is not of equal thickness to the first shell wall; and / or, the first clamping portion is not of equal thickness to the second clamping portion; and / or, at least one of the first clamping portion and the second clamping portion is not of equal thickness to the body portion; and / or, at least one of the first clamping portion and the second clamping portion is not of equal thickness to the first shell wall.

14. The battery cell according to any one of claims 2-13, wherein, The outer insulating component's surface facing away from the first clamping part smoothly transitions to the end face of the pole body facing away from the electrode component.

15. The battery cell according to claim 2, wherein, The end face of the pole body facing away from the electrode component has a step, and the outer insulating member extends at least partially to the step.

16. The battery cell according to claim 15, wherein, The step is a ring structure, and the outer insulating component is arranged around the first clamping part.

17. The battery cell according to any one of claims 2-13, wherein, The first clamping portion includes a first extension section, a second extension section and an arc-shaped extension section. The first extension section is arranged around the periphery of the electrode body and connected to the second clamping portion. The second extension section is located on the side of the electrode body away from the electrode component and is arranged at a distance from the second clamping portion. The first extension section and the second extension section are connected by the arc-shaped extension section. The external insulation component includes a first insulation section, a second insulation section, and an arc-shaped insulation section. The first insulation section covers the side of the first extension section away from the pole body, and the second insulation section covers the side of the second extension section away from the pole body. The first insulation section and the second insulation section are connected by the arc-shaped insulation section.

18. The battery cell according to claim 17, wherein, The number of the second extension segments is multiple, and the multiple second extension segments are arranged circumferentially at intervals in the pole body, with two adjacent second extension segments defining at least a portion of the connecting portion.

19. The battery cell according to claim 17, wherein, The surface of the second insulating section facing away from the second extension section is on the same plane as the end face of the pole body facing away from the electrode component.

20. The battery cell according to any one of claims 2-19, wherein, The periphery of the pole body has a flange portion, which is located between the first clamping portion and the second clamping portion in the thickness direction of the first shell wall, and the first inner insulating member is at least partially located between the first clamping portion and the flange portion.

21. The battery cell according to claim 20, wherein, The pole post component also includes a sealing ring, which is disposed between the second clamping portion and the flange portion; Alternatively, the pole piece may further include an integrally formed sealing ring, which is located both between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion; Alternatively, the pole piece may further include a sealing ring and a second inner insulating member. The sealing ring is disposed between the connection position of the first clamping portion and the second clamping portion and the flange portion, and the second inner insulating member is disposed between the second clamping portion and the flange portion at a position away from the first clamping portion.

22. The battery cell according to any one of claims 1-21, wherein, The end face of the electrode body facing the electrode component is flush with the side surface of the first shell wall facing the electrode component. Alternatively, the end face of the electrode body facing the electrode component is located on the side of the first shell wall facing the electrode component that is away from the electrode component.

23. The battery cell according to any one of claims 1-21, wherein, The electrode body also includes an insulating support, which is disposed on the side of the clamping structure near the electrode component. The electrode body includes an inner protrusion located in the inner ring region of the insulating support, and the inner protrusion protrudes towards the inside of the first shell wall relative to the clamping structure. The inner surface of the pole post near the electrode component is flush with the inner surface of the insulating support near the electrode component, or is located on the side of the insulating support away from the electrode component.

24. The battery cell according to any one of claims 1-23, wherein, The housing component includes a housing body having an opening at at least one end and a housing cover disposed at the opening; wherein, the wall of the housing body opposite to the opening is the first housing wall; or, the housing cover is the first housing wall.

25. The battery cell according to any one of claims 1-24, wherein, It also includes a pressure relief device, which is located on the housing component and on the same side or opposite side as the pole component.

26. A battery device, wherein, Includes the battery cell according to any one of claims 1-25.

27. An electrical appliance, wherein, Includes the battery device according to claim 26.

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