Battery cell, battery apparatus, and electrical apparatus

Abstract

A battery cell, a battery apparatus, and an electrical apparatus. The battery cell comprises a housing component, an electrode component, and a pole component. The housing component comprises a first housing wall, the electrode component is accommodated in the housing component, and the pole component comprises a pole body, a clamping structure, and an insulating sealing structure. The pole body is connected to the electrode component. The clamping structure surrounds the pole body and is connected to the first housing wall, and the clamping structure is provided with a clamping groove for clamping the pole body. In the thickness direction of the first housing wall, the clamping groove comprises a first corner and a second corner which are spaced apart, the first corner being close to the electrode component. The insulating sealing structure is arranged between the clamping structure and the pole body and is at least sealingly arranged between the pole body and the first corner. In the technical solution of the embodiments of the present application, the problem of insufficient compression of the insulating sealing structure can be solved, and the sealing reliability of the pole component itself is improved, thereby improving the reliability 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] In related technologies, the reliability of battery cells is reduced due to insufficient compression of the sealing components at the terminals.

[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 an insulating sealing structure; the terminal body being connected to the electrode component; the clamping structure surrounding the terminal body and connected to the first housing wall, the clamping structure having a clamping groove for clamping the terminal body, the clamping groove including a first corner and a second corner spaced apart in the thickness direction of the first housing wall, the first corner being close to the electrode component; wherein the insulating sealing structure is disposed between the clamping structure and the terminal body, and is at least sealed between the terminal body and the first corner.

[0007] In the technical solution of this application embodiment, by setting the insulating sealing structure between the clamping structure and the electrode body, insulation and sealing can be achieved between the clamping structure and the electrode body. The insulating sealing structure is at least sealed at the electrode body and the first corner, which can reduce the impact of the deformation of the clamping structure at the first corner when the electrode body is under pressure or tension on the sealing effect of the first sealing ring, reduce sealing failure, solve the problem of insufficient compression of the insulating sealing structure, and enable the insulating sealing structure to meet the required sealing requirements. On the one hand, it can reduce the risk of short circuit problems or other electrical safety accidents, and on the other hand, it can reduce the probability of electrolyte seepage from the inside of the shell component and the entry of moisture and dust into the shell component, thereby improving the reliability of the battery cell.

[0008] In some embodiments, the clamping structure includes a first clamping portion and a second clamping portion, with a clamping groove defined between the first clamping portion and the second clamping portion, and a first corner formed at the connection between the first clamping portion and the second clamping portion; the insulating sealing structure includes a first sealing ring, which is sealed between the pole body and the first corner. In the above technical solution, by placing the first sealing ring between the pole body and the first corner, which is equivalent to placing the first sealing ring between the pole body and the second clamping portion near its fixed end, the influence of deformation of the second clamping portion on the sealing effect of the first sealing ring when the pole body is under pressure or tension can be reduced, reducing sealing failure and enabling the first sealing ring to meet the required sealing requirements.

[0009] In some embodiments, the first sealing ring includes a first sealing portion, which is sealed between the second clamping portion and the electrode body, and extends at least partially to the first corner. The first sealing portion can seal between the second clamping portion and the electrode body. Since the first sealing portion extends at least partially to the first corner, the probability of the first sealing ring failing to seal can be reduced, thereby enabling the first sealing ring to meet the required sealing requirements.

[0010] In some embodiments, the first sealing ring further includes a second sealing portion, which is angled to the first sealing portion and is sealingly disposed between the first clamping portion and the electrode body. The first sealing portion can seal between the second clamping portion and the electrode body, and the second sealing portion can seal between the first clamping portion and the electrode body, so that the first sealing ring seals the electrode body and the clamping structure in two intersecting directions, further improving the sealing reliability of the first sealing ring between the electrode body and the clamping structure.

[0011] In some embodiments, the second sealing portion is positioned at a first preset angle to the first sealing portion before compression, and the first clamping portion and the second clamping portion are positioned at a second preset angle, wherein the first preset angle is greater than the second preset angle. In the above technical solution, by limiting the first preset angle to be greater than the second preset angle, the first clamping portion of the clamping structure can press the second sealing portion, so that both the first clamping portion and the pole body are in contact with the second sealing portion, thereby improving the sealing reliability of the first sealing ring.

[0012] In some embodiments, in the thickness direction of the first shell wall, the dimension of the first sealing portion before compression is L1, and the gap between the second clamping portion and the pole body is L2, wherein the ratio of L1 to L2 is greater than 1.2. In the above technical solution, by limiting the above dimensions, the second clamping portion and the pole body of the clamping structure can press the first sealing portion tightly, solving the problem of insufficient compression of the first sealing portion, thereby improving the sealing reliability of the first sealing ring.

[0013] In some embodiments, the first sealing ring further includes a third sealing portion, which is disposed opposite to the first sealing portion in the thickness direction of the first shell wall, and a second sealing portion is connected between the first sealing portion and the third sealing portion; the third sealing portion and the second sealing portion are disposed at an angle, and the third sealing portion is sealed between the first clamping portion and the side of the electrode body away from the electrode component. In the above technical solution, by providing the third sealing portion, the first clamping portion and the side of the electrode body away from the electrode component can be sealed. On the one hand, this increases the contact area between the first sealing ring and the clamping structure and the electrode body; on the other hand, it can seal between the clamping structure and the electrode body from multiple directions, thereby improving the sealing reliability of the first sealing ring between the clamping structure and the electrode body, thereby further reducing short circuit problems and reducing the probability of electrolyte seepage from the inside of the shell component and moisture and dust entering the shell component.

[0014] In some embodiments, the peripheral side of the electrode 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; wherein, the first sealing ring is sealed between the flange portion and the first clamping portion, and between the side of the flange portion facing the electrode component and the second clamping 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 in a direction away from or close to the electrode component is restricted. The structure of the flange portion is simple and easy to process. By clamping the first sealing ring between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion, it is beneficial to seal the mating position of the clamping structure and the electrode body with a shorter path, thereby improving the reliability of the seal. Moreover, it is beneficial to reduce the size of the first sealing ring, making it easier to clamp, making the sealing performance less prone to failure, and improving the sealing effect.

[0015] In some embodiments, the pole member further includes an outer insulating member that at least partially covers the side of the first clamping portion opposite to the flange portion. The outer insulating member separates the clamping structure and the busbar component, thereby insulating the clamping structure and the busbar component, and the first housing wall and the busbar component.

[0016] In some embodiments, the end surface of the electrode body facing away from the electrode component smoothly transitions to the side surface of the outer insulation member facing away from the flange portion; or, the electrode body at least partially protrudes from the side surface of the outer insulation member facing away from the flange portion. When the end surface of the electrode body facing away from the electrode component smoothly transitions to the side surface of the outer insulation member facing away from the flange portion, it simplifies the external structure of the battery cell, making the battery cell more aesthetically pleasing. It also reduces the blocking effect of the outer insulation member on the current-connecting component, improving the connection reliability between the electrode body and the current-connecting component. When the electrode body at least partially protrudes from the side surface of the outer insulation member facing away from the flange portion, the outer insulation member, while maintaining insulation performance, does not affect the connection reliability between the electrode body and the current-connecting component. Furthermore, it reduces interference from the electrode component to other components outside the housing (such as the current-connecting component), which is beneficial for improving the reliability of the battery cell.

[0017] 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 the second extension section is located on the side of the electrode body opposite to the electrode component. 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 opposite to the electrode body, and the second insulating section covers the side of the second extension section opposite to 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 configuring the first clamping portion to include the first extension section, the second extension section, and the arc-shaped extension section, and configuring 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.

[0018] In some embodiments, the surface of the second insulating section facing away from the second extension section is not higher than the surface of the electrode body facing away from the electrode component. In the above technical solution, by setting the surface of the second insulating section facing away from the second extension section to be no higher than the surface of the electrode body facing away from the electrode component, the interference of the electrode component with other components outside the housing component (such as the busbar component) can be reduced, thereby improving the reliability of the battery cell.

[0019] In some embodiments, the periphery of the end surface of the electrode body facing away from the electrode component has a step, and the outer insulating member extends at least partially to the side of the step near the flange, so as to be flush with the step surface. In the above technical solution, by extending at least partially the outer insulating member to the side of the step near the flange, so as to be flush with the step surface, the external structure of the battery cell can be simplified, making the battery cell more aesthetically pleasing. On the other hand, the electrode body can protrude at least partially from the side surface of the outer insulating member facing away from the flange, so that the outer insulating member can reduce the interference of the electrode component with other components outside the housing component (such as current-carrying components) while satisfying the insulation effect, which is beneficial to improving the reliability of the battery cell.

[0020] In some embodiments, the pole piece further includes a first inner insulating member, which is at least partially insulatingly fitted between the flange and the first clamping portion, and located between the first sealing ring and the outer insulating member. In the above technical solution, by providing the first inner insulating member, insulation between the pole piece body and the clamping structure can be achieved, giving the pole piece itself self-insulating properties, facilitating the installation and fitting of the pole piece with the first shell wall, and saving installation time and cost.

[0021] In some embodiments, the first inner insulating member is at least partially insulatingly fitted between the side of the flange portion away from the electrode component and the first clamping portion; and / or, the end of the first clamping portion away from the second clamping portion is between the electrode post body and the first clamping portion. In the above technical solution, the structure of the first inner insulating member is simple and can be flexibly configured as needed to meet the insulation requirements between the electrode post body and the first clamping portion.

[0022] In some embodiments, a first sealing ring is at least partially sealed between the side of the flange portion away from the electrode component and the first clamping portion, and a first inner insulating member is at least partially insulatingly fitted between the end of the first clamping portion away from the second clamping portion and the electrode body. In the above technical solution, the first sealing ring and the first inner insulating member work together to seal and insulate between the first clamping portion and the electrode body, giving the electrode component itself sealing and insulation properties, which helps to improve the reliability of the electrode component.

[0023] In some embodiments, the outer insulating component and the first inner insulating component are separately disposed; or, the outer insulating component and the first inner insulating component are integrally formed. By disposing of the outer insulating component and the first inner insulating component separately, the outer insulating component and the first inner insulating component can be formed separately, simplifying the processing difficulty of each structure; by integrally forming the outer insulating component and the first inner insulating component, the connection step between the two can be eliminated, which is beneficial to improving production efficiency and improving the connection reliability between the outer insulating component and the first inner insulating component, thereby improving the insulation reliability of the outer insulating component and the first inner insulating component.

[0024] In some embodiments, the first inner insulating member and the first sealing ring are separately disposed; or, the first inner insulating member and the first sealing ring are integrally formed. In the above technical solutions, by separately disposing of the first inner insulating member and the first sealing ring, the first inner insulating member and the first sealing ring can be formed separately, simplifying the processing difficulty of each structure; by integrally disposing of the first inner insulating member and the first sealing ring, the connection step between the two can be eliminated, which is beneficial to improving production efficiency and improving the connection reliability between the first inner insulating member and the first sealing ring, thereby improving the insulation reliability of the first inner insulating member and the sealing reliability of the first sealing ring.

[0025] In some embodiments, the outer insulating component, the first inner insulating component, and the first sealing ring are integrally formed. Integrating the outer insulating component, the first inner insulating component, and the first sealing ring eliminates the need for connection steps, improving production efficiency. It also enhances the connection reliability of the outer insulating component, the first inner insulating component, and the first sealing ring, thereby improving the insulation reliability of the outer insulating component and the first inner insulating component, as well as the sealing reliability of the first sealing ring.

[0026] In some embodiments, the electrode post component further includes a second sealing ring, which at least partially seals the second clamping portion at a position away from the first clamping portion and the electrode post body. In the above technical solution, by providing the second sealing ring, a seal can be achieved between the second clamping portion and the electrode post body. Combined with the first sealing ring, this further improves the sealing reliability between the second clamping portion and the electrode post body, thereby further reducing short-circuit problems and lowering the probability of electrolyte leakage from the housing component and the entry of moisture and dust into the housing component.

[0027] In some embodiments, the second sealing ring and the first sealing ring are separately disposed; or, the second sealing ring and the first sealing ring are integrally formed. In the above technical solutions, by separately disposing of the second sealing ring and the first sealing ring, they can be formed separately, simplifying the processing difficulty of each structure; by integrally disposing of the second sealing ring and the first sealing ring, the connection step between them can be eliminated, which is beneficial to improving production efficiency and the connection reliability of the second sealing ring and the first sealing ring, thereby improving the sealing reliability of the second sealing ring and the first sealing ring.

[0028] In some embodiments, the electrode post component further includes an insulating support disposed on the side of the clamping structure near the electrode component; the insulating support and the second sealing ring are separately disposed; or, the insulating support and the second sealing ring are integrally formed. In the above technical solutions, by providing an insulating support, the active material coating portion of the clamping structure and the electrode component can be separated, as well as the active material coating portion of the first shell wall and the electrode component can be separated, so that the insulating support can meet the insulation requirements.

[0029] In some embodiments, the terminal post component further includes a second inner insulator, which is at least partially insulatingly fitted between the second clamping portion and the terminal post body at a position away from the first clamping portion. In the above technical solution, by employing a first sealing ring and a second inner insulator, and by rationally arranging the first sealing ring, the first inner insulator, and the second inner insulator between the terminal post body and the clamping structure, insulation and sealing failures can be reduced, and the insulation and sealing effect between the terminal post body and the clamping structure can be better improved, thereby enhancing the reliability of the battery cell.

[0030] In some embodiments, the electrode post component further includes an insulating support disposed on the side of the clamping structure near the electrode component; the insulating support and the second inner insulating member are separately disposed; or, the insulating support and the second inner insulating member are integrally formed. In the above technical solutions, by providing an insulating support, the active material coating portion of the clamping structure and the electrode component can be separated, as well as the active material coating portion of the first shell wall and the electrode component can be separated, so that the insulating support can meet the insulation requirements.

[0031] In some embodiments, the clamping structure further includes a body portion, which is circumferentially disposed around the second clamping portion and connected to the first shell wall. The body portion has a simple structure and can be positioned between the clamping member and the first shell wall to fix the clamping member to the first shell wall.

[0032] In some embodiments, the body, the first clamping part, and the second clamping part are integrally formed; or, the body and the first shell wall are integrally formed; or, the body and the first shell wall are welded together. In the above technical solutions, the integrally formed body, first clamping part, and second clamping part not only eliminate the connection steps among the three, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure, thus enhancing its reliability. By integrally forming the body and the first shell wall, the connection steps between them are eliminated, which is beneficial to improving production efficiency. It also improves the structural strength of the first shell wall and the clamping structure, thus enhancing their reliability. By welding the body and the first shell wall together, the assembly steps of the clamping structure, the pole body, the insulating sealing structure, and the first shell wall are simplified, which is beneficial to improving production efficiency.

[0033] In some embodiments, the clamping structure is formed as an elongated strip extending along the length of the first shell wall, and the outline shape of the electrode body matches the outline shape of the clamping structure; alternatively, the electrode body is located in the center of the clamping structure and has a circular outline. This configuration results in a larger electrode body area, which is beneficial for increasing the connection area between the conductive part and the electrode body, thereby improving charging performance.

[0034] In some embodiments, the clamping structure is formed as a ring, and the contour shape of the pole body matches the contour shape of the clamping structure. This configuration ensures uniform force at the connection point between the clamping structure and the pole body, making it easier to control the compression of the insulating sealing structure, thereby improving the reliability of their sealing fit. Furthermore, the sealing area is relatively small, making it less prone to failure.

[0035] 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 to 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 position of the pole component is flexible.

[0036] In some embodiments, the battery cell further includes a pressure relief device located on the housing component and on the same side or opposite side to the terminal component. By providing the 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.

[0037] Secondly, this application provides a battery device including the battery cell described in the above embodiments. In the technical solutions of this application, employing the battery cell described in the above embodiments helps to improve the performance of the battery device.

[0038] Thirdly, this application provides an electrical device, including the battery device of the above embodiments. In the technical solutions of this application, by employing the battery device of the above embodiments, it is beneficial to improve the working performance of the electrical device.

[0039] 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

[0040] 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:

[0041] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0042] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0043] Figure 3 is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0044] Figure 4 is an exploded view of the structure of the battery cell shown in Figure 3;

[0045] Figure 5 is a top view of a battery cell according to some other embodiments of this application;

[0046] Figure 6 is a structural cross-sectional view of a single battery cell along line AA in Figure 5.

[0047] Figure 7 is a partial enlarged view of the battery cell shown in Figure 6;

[0048] Figure 8 is an enlarged view of part B3 shown in Figure 7;

[0049] Figure 9 is a structural schematic diagram of the pole piece of some other embodiments of this application;

[0050] Figure 10 is a schematic diagram of the structure of the terminal post component of a battery cell on the first shell wall in some embodiments of this application;

[0051] Figure 11 is an exploded view of the structure of the pole post component and the first shell wall shown in Figure 10;

[0052] Figure 12 is an enlarged view of part C3 shown in Figure 11;

[0053] Figure 13 is a partial enlarged view of the pole post component of some embodiments of this application;

[0054] Figure 14 is a structural schematic diagram of the pole post component in some embodiments of this application;

[0055] Figure 15 is a structural schematic diagram of the pole component of 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, first corner 3201a, second corner 3201b, connecting part 3202, notch 3202a, through hole 3202b, body part 321, clamping member 322, first clamping part 3221, first extension section 32211, second extension section 32212, arc extension section 32213, second clamping part 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 first sealing ring 332, a first sealing part 3321, a second sealing part 3322, a third sealing part 3323, and a second sealing ring 333.

[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] When battery cells in related technologies are subjected to vibration, impact, or other external forces, their internal sealing may deteriorate, which may not only increase the risk of short circuits or other electrical safety accidents, but also cause electrolyte to leak from the casing components and allow moisture and dust to enter the casing components, ultimately leading to a decrease in the reliability of the battery cells.

[0078] Therefore, embodiments of this application propose a battery cell that, by sealing at least at the first corner 3201a between the terminal body and the clamping groove with an insulating sealing structure, can reduce the impact of deformation of the clamping structure at the first corner 3201a on the sealing effect of the first sealing ring when the terminal body is under pressure or tension, reduce sealing failure, and enable the insulating sealing structure to meet the required sealing requirements. This can reduce the probability of short circuits, electrolyte leakage from the outside of the casing components, and moisture and dust entering the casing components, thereby improving the reliability of the battery cell.

[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 shown in Figure 3; and Figure 6 is a cross-sectional view of the structure of the battery cell 10 along line AA in Figure 3. 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 3-6, the housing component 1 includes a first housing wall 13, which participates in forming a receiving cavity, and the material of the first housing wall 13 is not limited.

[0093] Referring to Figures 4 and 6, the electrode component 2 is housed within the housing component 1. For example, the electrode component 2 includes an active material coating portion 21 and a conductive portion 22. The active material coating portion 21 is housed within a receiving cavity, and the conductive portion 22 is connected to the active material coating portion 21. The conductive portion 22 may include tabs, which 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 Figure 7, which is a partial enlarged view of the battery cell 10 shown in Figure 6. The terminal component 3 includes a terminal body 31 and a clamping structure 32. The terminal body 31 is connected to the electrode component 2. The clamping structure 32 surrounds the terminal body 31 and is connected to the first shell wall 13. The clamping structure 32 has a clamping groove 3201 for clamping the terminal body 31, thereby fixing the terminal body 31 onto the clamping structure 32. The shapes of the clamping structure 32 and the terminal body 31 are not limited; for example, either one can be processed into a circle, ellipse, rectangle, or rectangle with rounded corners.

[0096] Further, please refer to Figure 7 again, and further refer to Figure 8, which is an enlarged view of part B3 shown in Figure 7. In the thickness direction of the first shell wall 13, the clamping groove 3201 includes a first corner 3201a and a second corner 3201b that are spaced apart. The first corner 3201a is close to the electrode component 2, and the second corner 3201b is away from the electrode component 2.

[0097] The pole component 3 also includes an insulating sealing structure 33, which is disposed between the clamping structure 32 and the pole body 31 to achieve an insulating seal between the clamping structure 32 and the pole body 31. The insulating sealing structure 33 is also at least sealed between the pole body 31 and the first angle 3201a.

[0098] Specifically, the positions of the first corner 3201a and the second corner 3201b are further away from the center of the pole body 31 than other positions within the clamping groove 3201. When the pole body 31 is compressed or stretched, the clamping structure 32 is less likely to deform at the first corner 3201a and the second corner 3201b. Therefore, by sealing the insulating sealing structure 33 at least between the pole body 31 and the first corner 3201a, the effect of deformation of the clamping structure 32 at the first corner 3201a on the sealing effect of the first sealing ring 332 when the pole body 31 is compressed or stretched can be reduced, thereby reducing sealing failure and ensuring that the insulating sealing structure 33 meets the required sealing requirements.

[0099] Therefore, in the technical solution of this application embodiment, by setting the insulating sealing structure 33 between the clamping structure 32 and the electrode body 31, insulation and sealing can be achieved between the clamping structure 32 and the electrode body 31. The insulating sealing structure 33 is at least sealed at the electrode body 31 and the first corner 3201a. This can reduce the impact of deformation of the clamping structure 32 at the first corner 3201a when the electrode body 31 is under pressure or tension on the sealing effect of the first sealing ring 332, reduce sealing failure, solve the problem of insufficient compression of the insulating sealing structure 33, and enable the insulating sealing structure 33 to meet the required sealing requirements. On the one hand, this can reduce the risk of short circuit problems or other electrical safety accidents, and on the other hand, it can reduce the probability of electrolyte seepage from the inside of the casing component and the entry of moisture and dust into the casing component, thereby improving the reliability of the battery cell.

[0100] Please refer to Figures 7 and 8 again. In some embodiments, the clamping structure 32 includes a first clamping part 3221 and a second clamping part 3222, and a clamping groove 3201 is defined between the first clamping part 3221 and the second clamping part 3222.

[0101] 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.

[0102] The first clamping part 3221 and the second clamping part 3222 form a first corner 3201a at their connection. The insulating sealing structure 33 includes a first sealing ring 332, which is sealed between the pole body 31 and the first corner 3201a.

[0103] In other words, the first sealing ring 332 is disposed within the clamping groove 3201, and the first sealing ring 332 is disposed between the connection position of the first clamping part 3221 and the second clamping part 3222 and the pole body 31. The shape of the first sealing ring 332 can be adapted to the connection position of the first clamping part 3221 and the second clamping part 3222.

[0104] 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 first sealing ring 332 is placed between the end of the second clamping part 3222 away from the first clamping part 3221 and the pole body 31, it may affect the sealing effect of the first sealing ring 332.

[0105] Therefore, in the above technical solution, by setting the first sealing ring 332 between the electrode body 31 and the first corner 3201a, that is, by setting the first sealing ring 332 between the electrode body 31 and the second clamping part 3222 near its fixed end, the influence of the deformation of the second clamping part 3222 on the sealing effect of the first sealing ring 332 when the electrode body 31 is under pressure or tension can be reduced, sealing failure can be reduced, the problem of insufficient compression of the first sealing ring 332 can be solved, and the first sealing ring 332 can meet the required sealing requirements, thereby reducing short circuit problems and reducing the probability of electrolyte seeping out from the inside of the housing component and moisture and dust entering the housing component.

[0106] The first sealing ring 332 can be made of a material that has both sealing and insulating properties, such as an elastic rubber component. Thus, the required sealing requirements can be met by designing the shape and position of the first sealing ring 332.

[0107] Since the first sealing ring 332 is located between the pole body 31 and the clamping structure 32, the pole component 3 itself has self-sealing properties, which facilitates the installation and cooperation of the pole component 3 with the first shell wall 13, and can save installation time and cost.

[0108] 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.

[0109] Please refer to Figure 8 again. In some embodiments, the first sealing ring 332 includes a first sealing portion 3321, which is sealed between the second clamping portion 3222 and the pole body 31, and extends at least partially to the first corner 3201a.

[0110] For example, the first sealing part 3321 may extend radially along the pole body 31. The outer end of the first sealing part 3321 in the radial direction extends to the first corner 3201a. Specifically, the first sealing part 3321 is sandwiched between the second clamping part 3222 and the pole body 31, and one side of the first sealing part 3321 may contact or be spaced apart from the first clamping part 3221.

[0111] Therefore, the first sealing part 3321 can seal the space between the second clamping part 3222 and the pole body 31. Since the first sealing part 3321 extends at least partially to the first corner 3201a, the probability of the first sealing ring 332 failing to seal can be reduced, thereby enabling the first sealing ring 332 to meet the required sealing requirements.

[0112] Referring again to Figure 8, in some embodiments, the first sealing ring 332 further includes a second sealing portion 3322. The second sealing portion 3322 and the first sealing portion 3321 are arranged at an angle, and the second sealing portion 3322 is sealed between the first clamping portion 3221 and the pole body 31.

[0113] Specifically, the first clamping part 3221 and the second clamping part 3222 are set at an angle to form the first corner 3201a of the clamping groove 3201. The first sealing ring 332 includes the connected first sealing part 3321 and the second sealing part 3322. Correspondingly, the first sealing part 3321 and the second sealing part 3322 are set at an angle. The first sealing part 3321 is clamped between the second clamping part 3222 and the side of the electrode body 31 near the electrode component 2. The second sealing part 3322 is clamped between the first clamping part 3221 and the electrode body 31, so that the first sealing ring 332 seals the space between the electrode body 31 and the first clamping part 3221, and between the electrode body 31 and the second clamping part 3222.

[0114] Therefore, the first sealing part 3321 can seal the space between the second clamping part 3222 and the pole body 31, and the second sealing part 3322 can seal the space between the first clamping part 3221 and the pole body 31, so that the first sealing ring 332 seals the pole body 31 and the clamping structure 32 in two intersecting directions, further improving the sealing reliability of the first sealing ring 332 between the pole body 31 and the clamping structure 32.

[0115] In some embodiments, the second sealing portion 3322 is set at a first preset angle to the first sealing portion 3321 before compression, and the first clamping portion 3221 and the second clamping portion 3222 are set at a second preset angle, wherein the first preset angle is greater than the second preset angle.

[0116] In other words, before the first sealing ring 332 is installed into the clamping groove 3201, the second sealing part 3322 and the first sealing part 3321 are set at a first preset angle. Since the included angle between the first clamping part 3221 and the second clamping part 3222 is less than the first preset angle, after the first sealing ring 332 is installed into the clamping groove 3201 and assembled with the clamping structure 32 and the pole body 31, the first clamping part 3221 can press the second sealing part 3322, causing the second sealing part 3322 to deform toward the pole body 31, thereby solving the problem of insufficient compression of the second sealing part 3322.

[0117] Therefore, in the above technical solution, by limiting the first preset angle to be greater than the second preset angle, the first clamping part 3221 of the clamping structure 32 can press the second sealing part 3322, so that the first clamping part 3221 and the pole body 31 both form an interference fit with the second sealing part 3322, thereby improving the sealing reliability of the first sealing ring 332.

[0118] In some embodiments, in the thickness direction of the first shell wall 13, the size of the first sealing part 3321 before compression is L1, the gap between the second clamping part 3222 and the pole body 31 is L2, and the ratio of L1 to L2 is greater than 1.2.

[0119] In other words, before the first sealing ring 332 is installed into the clamping groove 3201, the thickness of the first sealing portion 3321 is L1. Since the gap between the second clamping portion 3222 and the pole body 31 is less than L1, after the first sealing ring 332 is installed into the clamping groove 3201 and assembled with the clamping structure 32 and the pole body 31, the second clamping portion 3222 and the pole body 31 can press the first sealing portion 3321, thereby compressing the first sealing portion 3321 and solving the problem of insufficient compression of the first sealing portion 3321.

[0120] Therefore, in the above technical solution, by limiting the above dimensions, the second clamping part 3222 of the clamping structure 32 and the pole body 31 can press the first sealing part 3321 together to form an interference fit, thereby solving the problem of insufficient compression of the first sealing part 3321 and improving the sealing reliability of the first sealing ring 332.

[0121] Please refer to Figure 9, which is a schematic diagram of the structure of the pole member 3 in some other embodiments of this application. In some embodiments, the first sealing ring 332 further includes a third sealing portion 3323, that is, the first sealing ring 332 includes a first sealing portion 3321, a second sealing portion 3322 and a third sealing portion 3323, the third sealing portion 3323 and the first sealing portion 3321 are disposed opposite to each other in the thickness direction of the first shell wall 13, and the second sealing portion 3322 is connected between the first sealing portion 3321 and the third sealing portion 3323.

[0122] The first sealing part 3321 and the second sealing part 3322 are arranged at an angle. The first sealing part 3321 is sealed between the second clamping part 3222 and the side of the electrode body 31 facing the electrode component 2. The second sealing part 3322 is sealed between the first clamping part 3221 and the radial outer side of the electrode body 31.

[0123] The third sealing part 3323 and the second sealing part 3322 are arranged at an angle, and the third sealing part 3323 is sealed between the first clamping part 3221 and the side of the electrode body 31 away from the electrode component 2.

[0124] For example, the cross-section of the third sealing part 3323 can be a straight structure. The third sealing part 3323 and the first sealing part 3321 can be arranged in parallel, or the third sealing part 3323 can be arranged at an angle relative to the first sealing part 3321. For example, the third sealing part 3323 can also be a bent structure or an arc-shaped structure, which can be selected according to actual needs.

[0125] Therefore, in the above technical solution, by setting the third sealing part 3323, the first clamping part 3221 and the side of the electrode body 31 away from the electrode component 2 can be sealed. On the one hand, the contact area between the first sealing ring 332 and the clamping structure 32 and the electrode body 31 can be increased. On the other hand, the clamping structure 32 and the electrode body 31 can be sealed from multiple directions, thereby improving the sealing reliability of the first sealing ring 332 between the clamping structure 32 and the electrode body 31, further reducing short circuit problems, and reducing the probability of electrolyte seeping out from the inside of the housing component and moisture and dust entering the housing component.

[0126] Referring again to Figures 8 and 9, the periphery of the pole body 31 has a flange portion 312. In the thickness direction of the first shell wall 13, the flange portion 312 is located between the first clamping portion 3221 and the second clamping portion 3222. The flange portion 312 can be a structure located on the outer periphery of the pole body 31. For example, the flange portion 312 can be an annular structure located on the outer periphery of the pole body 31; as another example, the flange portion 312 can be multiple discontinuous structures located on the outer periphery of the pole body 31.

[0127] 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.

[0128] The first sealing ring 332 is disposed between the flange portion 312 and the first clamping portion 3221, and between the side of the flange portion 312 facing the electrode component 2 and the second clamping portion 3222.

[0129] 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 in the direction away from or close to the electrode component 2 is restricted. The structure of the flange portion 312 is simple and easy to process. By clamping the first sealing ring 332 between the first clamping portion 3221 and the flange portion 312, and between the second clamping portion 3222 and the flange portion 312, it is beneficial to seal the mating position of the clamping structure 32 and the electrode body 31 with a shorter path, thereby improving the reliability of the seal. Moreover, it is beneficial to reduce the size of the first sealing ring 332, making it easier to clamp it, so that the sealing performance is less likely to fail and the sealing effect is improved.

[0130] Referring again to Figures 8 and 9, the pole member 3 also includes an outer insulating member 34, which at least partially covers the side of the first clamping portion 3221 opposite to the flange portion 312. The pole body 31 can be electrically connected to the busbar component. The outer insulating member 34 separates the clamping structure 32 and the busbar component, thus insulating the clamping structure 32 and the busbar component, and the first housing wall 13 and the busbar component.

[0131] Depending on the matching requirements with the pole body 31 and the clamping structure 32, the outer insulating part 34 can be set as an insulating part that is basically incompressible and does not have a sealing effect (e.g., a plastic part), or the outer insulating part 34 can be set as a compressible insulating part with a sealing effect (e.g., an elastic rubber part), thereby meeting different practical requirements.

[0132] Please refer to Figures 10-12. Figure 10 is a schematic diagram of the structure of the terminal post 3 of the battery cell 10 in some embodiments of this application on the first shell wall 13; Figure 11 is an exploded view of the structure of the terminal post 3 and the first shell wall 13 shown in Figure 10; Figure 12 is an enlarged view of part C3 shown in Figure 11. A connecting portion 3202 is provided on the clamping structure 32, and the insulating sealing structure 33 (e.g., the first sealing ring 332) and the outer insulating member 34 are connected through the connecting portion 3202. That is, a portion of the insulating sealing structure 33 and / or a portion of the outer insulating member 34 extends into the connecting portion 3202, thereby connecting the two.

[0133] For example, after the first shell wall 13 is assembled with the pole member 3 after removing the outer insulation 34, the assembly can be placed in a mold, and then a melt for forming the outer insulation 34 is injected into the mold. The melt can be fused together with the insulating sealing structure 33 through the connecting part 3202. After the melt solidifies, the outer insulation 34 is formed, and the outer insulation 34 is connected to the insulating sealing structure 33.

[0134] 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 without 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 insulating sealing structure 33 through the connecting part 3202.

[0135] Therefore, by providing a connecting portion 3202 on the clamping structure 32, the insulating sealing structure 33 and the outer insulating member 34 can be connected through the connecting portion 3202, which can improve the installation reliability of the outer insulating member 34. This can 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. Furthermore, the connection between the outer insulating member 34 and the insulating sealing structure 33 can further improve the insulation sealing 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.

[0136] Referring again to Figures 11 and 12, 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 opposite to 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.

[0137] 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, thereby forming 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 part 34 and the insulating sealing structure 33 through the notch 3202a, 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.

[0138] 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.

[0139] 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 the arc-shaped extension section 32213, 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 extension section 32213.

[0140] 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 insulating sealing structure 33, making the insulation between the pole body 31 and the first clamping part 3221 more reliable.

[0141] Please refer to Figures 13 and 14. Figure 13 is a partially enlarged view of the pole post component 3 according to some embodiments of this application; Figure 14 is a structural schematic diagram of the pole post component 3 according to some embodiments of this application. 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 pole post body 31 in the circumferential direction of the first clamping portion 3221. The through holes 3202b can be round holes, square holes, etc.

[0142] In the above technical solution, by providing a through hole 3202b on the first clamping part 3221, the outer insulating part 34 and the insulating sealing structure 33 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.

[0143] 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.

[0144] 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 the 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 component 34 and the insulating sealing structure 33 to make full contact and connection at the through hole 3202b, thereby improving the installation reliability of the outer insulating component 34.

[0145] Please refer to Figures 13 and 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.

[0146] 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.

[0147] 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.

[0148] Please refer to Figure 11 again. There are multiple connecting parts 3202, and the multiple connecting parts 3202 are arranged at intervals around the pole body 31 around the first clamping part 3221.

[0149] 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.

[0150] In the above technical solution, by setting multiple connecting parts 3202, the insulating sealing structure 33 and the outer insulating component 34 are connected at the locations of the multiple connecting parts 3202, that is, the insulating sealing structure 33 and the outer insulating component 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 component 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.

[0151] Referring again to Figure 3, in some embodiments, the surface of the electrode post 31 facing away from the electrode component 2 is smoothly connected to the surface of the outer insulating member 34 facing away from the flange portion 312. That is, the surface of the electrode post 3 facing away from the electrode component 2 is relatively flat.

[0152] 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.

[0153] Referring again to Figures 6 and 7, in some embodiments, the terminal body 31 at least partially protrudes from the side surface of the outer insulating member 34 opposite to the flange portion 312. When the terminal member 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 member 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.

[0154] Please refer to Figure 8 again. The first clamping part 3221 includes a first extension section 32211, a second extension section 32212 and an arc extension section 32213. The first extension section 32211 is arranged around the periphery of the electrode body 31, and the second extension section 32212 is located on the side of the electrode body 31 away from the electrode component 2. The first extension section 32211 and the second extension section 32212 are connected by the arc extension section 32213.

[0155] 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.

[0156] 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.

[0157] The number of second extension segments 32212 is multiple, and the multiple second extension segments 32212 are arranged circumferentially at intervals on the pole body 31. Two adjacent second extension segments 32212 define at least a partial connecting portion 3202.

[0158] For example, when assembling the pole body 31, the clamping structure 32, and the insulating sealing structure 33, the pole body 31, the insulating sealing structure 33, 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 insulating sealing structure 33 is pressed, thereby fixing the pole body 31 onto the clamping structure 32 and clamping the insulating sealing structure 33 between the pole body 31 and the clamping structure 32.

[0159] 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 insulating sealing structure 33, making the insulation between the pole body 31 and the first clamping part 3221 more reliable.

[0160] In some embodiments, the side surface of the second insulating segment 342 facing away from the second extension segment 32212 is not higher than the end surface of the pole body 31 facing away from the electrode component 2.

[0161] For example, the surface of the second insulating section 342 facing away from the second extension section 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 section 342 facing away from the second extension section 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.

[0162] For example, the terminal body 31 at least partially protrudes from the side surface of the second insulating section 342 facing away from the second extension section 32212. 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, which is beneficial to improving the reliability of the battery cell 10.

[0163] Therefore, in the above technical solution, by setting the side surface of the second insulating section 342 away from the second extension section 32212 to be no higher than the end surface of the pole body 31 away from the electrode component 2, the interference of the pole component 3 to other components outside the housing component 1 (such as the busbar component, etc.) can be reduced, and the reliability of the battery cell 10 can be improved.

[0164] Please refer to Figure 8 again. 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.

[0165] 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.

[0166] 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.

[0167] Please refer to Figure 9 again. 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.

[0168] 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.

[0169] Please refer to Figure 10 again. In some embodiments, the periphery of the end surface 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 side of the step 311 near the flange portion 312 so as to be flush with the step 311 surface.

[0170] In the above technical solution, by extending the outer insulating member 34 at least partially to the side of the step 311 near the flange 312, so as to be flush with the step 311 surface, the external structure of the battery cell 10 can be simplified and the appearance of the battery cell 10 can be made more aesthetically pleasing. On the other hand, the terminal body 31 can protrude at least partially from the side surface of the outer insulating member 34 away from the flange 312, so that the outer insulating member 34 can reduce the interference of the terminal member 3 to other components outside the housing member 1 (such as the current busbar) while satisfying the insulation effect, which is conducive to improving the reliability of the battery cell 10.

[0171] In other embodiments, 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.

[0172] 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.

[0173] 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.

[0174] In the above technical solution, by setting a step 311 on the pole body 31, the contact area between the outer insulating component 34 and the pole body 31 can be increased, thereby increasing the connection reliability between the outer insulating component 34 and the pole body 31, making the insulation reliability between the busbar component and the clamping structure 32 higher. Furthermore, the outer insulating component 34 is connected to the insulating sealing structure 33, 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.

[0175] The step 311 can be a ring structure, with the outer insulating member 34 surrounding the first clamping part 3221. By setting the step 311 as a ring 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.

[0176] Referring again to Figures 8 and 9, in some embodiments, the pole member 3 further includes a first inner insulating member 3311. The first inner insulating member 3311 is at least partially insulatingly fitted between the flange portion 312 and the first clamping portion 3221, and is located between the first sealing ring 332 and the outer insulating member 34. That is, the first inner insulating member 3311 is disposed in the clamping groove 3201, and the first inner insulating member 3311 is clamped between the pole body 31 and the groove wall of the clamping groove 3201.

[0177] In the above technical solution, by setting the first inner insulating component 3311, insulation between the pole body 31 and the clamping structure 32 can be achieved, so that the pole component 3 itself has self-insulation, 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] In some embodiments, the first inner insulating member 3311 is at least partially insulatingly fitted between the flange portion 312 on the side opposite to the electrode component 2 and the first clamping portion 3221; and / or, the end of the first clamping portion 3221 away from the second clamping portion 3222 is between the electrode post body 31.

[0179] Referring to Figure 9, the first inner insulation member 3311 includes a first inner insulation section, which is disposed around the pole body 31. The first inner insulation section is sandwiched between the end of the first clamping part 3221 away from the second clamping part 3222 and the pole body 31, so that the end of the first clamping part 3221 away from the second clamping part 3222 is insulated from the pole body 31.

[0180] The first inner insulating member 3311 includes a second inner insulating section, which is disposed around the electrode post body 31. The second inner insulating section is clamped on the side of the flange portion 312 away from the electrode component 2 and the side of the first clamping portion 3221 close to the electrode component 2, so that the side of the first clamping portion 3221 close to the electrode component 2 is insulated from the flange portion 312.

[0181] Referring to Figure 8, the first inner insulating member 3311 includes a first inner insulating section. The first inner insulating section and the second inner insulating section are arranged at an angle. The first inner insulating section is sandwiched between the end of the first clamping part 3221 away from the second clamping part 3222 and the electrode body 31, so that the end of the first clamping part 3221 away from the second clamping part 3222 is insulated from the electrode body 31. The second inner insulating section is sandwiched between the side of the flange part 312 away from the electrode component 2 and the side of the first clamping part 3221 close to the electrode component 2, so that the side of the first clamping part 3221 close to the electrode component 2 is insulated from the flange part 312.

[0182] In the above technical solution, the first inner insulating member 3311 has a simple structure and can be flexibly set as needed to meet the insulation requirements between the pole body 31 and the first clamping part 3221.

[0183] In some embodiments, the first sealing ring 332 is at least partially sealed between the flange portion 312 on the side away from the electrode component 2 and the first clamping portion 3221, and the first inner insulating member 3311 is at least partially insulatingly fitted between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the electrode body 31.

[0184] Specifically, as shown in Figure 9, the first sealing ring 332 includes a first sealing part 3321, a second sealing part 3322 and a third sealing part 3323. The third sealing part 3323 and the first sealing part 3321 are disposed opposite to each other in the thickness direction of the first shell wall 13. The second sealing part 3322 is connected between the first sealing part 3321 and the third sealing part 3323.

[0185] The first sealing part 3321 and the second sealing part 3322 are arranged at an angle. The first sealing part 3321 is sealed between the second clamping part 3222 and the side of the electrode body 31 facing the electrode component 2. The second sealing part 3322 is sealed between the first clamping part 3221 and the radial outer side of the electrode body 31.

[0186] The third sealing part 3323 and the second sealing part 3322 are arranged at an angle. The third sealing part 3323 is sealed between the side of the first clamping part 3221 facing the electrode component 2 and the side of the flange part 312 away from the electrode component 2. The end of the third sealing part 3323 away from the second sealing part 3322 extends to the peripheral wall of the electrode body 31 and contacts or connects with the first inner insulating member 3311.

[0187] In the above technical solution, the first sealing ring 332 and the first inner insulating component 3311 are used together to seal and insulate the first clamping part 3221 and the electrode body 31, so that the electrode component 2 itself has sealing and insulation properties, which is beneficial to improving the reliability of the electrode component 2.

[0188] In some embodiments, the outer insulating member 34 and the first inner insulating member 3311 are separately disposed. Specifically, the outer insulating member 34 and the first inner insulating member 3311 may have a certain gap, or be in contact, or be connected. By separately disposing of the outer insulating member 34 and the first inner insulating member 3311, the outer insulating member 34 and the first inner insulating member 3311 can be formed separately, simplifying the processing difficulty of each structure.

[0189] In other embodiments, the outer insulating member 34 and the first inner insulating member 3311 are integrally formed. Integrating the outer insulating member 34 and the first inner insulating member 3311 eliminates the need for connection steps, improving production efficiency and enhancing the connection reliability between them, thereby improving the insulation reliability of the outer insulating member 34 and the first inner insulating member 3311.

[0190] In some embodiments, the first inner insulating member 3311 and the first sealing ring 332 are separately disposed. Specifically, the first inner insulating member 3311 and the first sealing ring 332 may have a certain gap, or be in contact, or be connected. By separately disposing of the first inner insulating member 3311 and the first sealing ring 332, the first inner insulating member 3311 and the first sealing ring 332 can be formed separately, simplifying the processing difficulty of each structure.

[0191] In other embodiments, the first inner insulating member 3311 and the first sealing ring 332 are integrally formed. Integrating the first inner insulating member 3311 and the first sealing ring 332 eliminates the need for a connection step, improving production efficiency and enhancing the connection reliability between the first inner insulating member 3311 and the first sealing ring 332. This, in turn, improves the insulation reliability of the first inner insulating member 3311 and the sealing reliability of the first sealing ring 332.

[0192] In some embodiments, the outer insulating member 34, the first inner insulating member 3311, and the first sealing ring 332 are integrally formed. This integral forming eliminates the need for connection steps, improving production efficiency and enhancing the connection reliability of the outer insulating member 34, the first inner insulating member 3311, and the first sealing ring 332. Consequently, the insulation reliability of the outer insulating member 34 and the first inner insulating member 3311, as well as the sealing reliability of the first sealing ring 332, are improved.

[0193] Please refer to Figure 15, which is a schematic diagram of the structure of the pole member 3 according to some other embodiments of this application. In some embodiments, the pole member 3 further includes a second sealing ring 333, which at least partially seals between the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0194] The second sealing ring 333 can be made of a material that has both sealing and insulating properties, such as an elastic rubber component. Therefore, the required sealing requirements can be met through the design of the shape and position of the second sealing ring 333. Furthermore, the second sealing ring 333 and the first sealing ring 332 can be made of the same material or different materials.

[0195] In the above technical solution, by setting the second sealing ring 333, the sealing between the second clamping part 3222 and the electrode body 31 can be achieved. In conjunction with the first sealing ring 332, the sealing reliability between the second clamping part 3222 and the electrode body 31 can be further improved, the short circuit problem can be further reduced, and the probability of electrolyte seeping out from the inside of the housing component and moisture and dust entering the housing component can be reduced.

[0196] In some embodiments, the second sealing ring 333 and the first sealing ring 332 are separately disposed. Specifically, the second sealing ring 333 and the first sealing ring 332 may have a certain gap, or be in contact, or be connected. By separately disposing of the second sealing ring 333 and the first sealing ring 332, the second sealing ring 333 and the first sealing ring 332 can be formed separately, simplifying the processing difficulty of each structure.

[0197] In other embodiments, the second sealing ring 333 is integrally formed with the first sealing ring 332. Integrating the second sealing ring 333 and the first sealing ring 332 eliminates the need for a connection step, improving production efficiency and enhancing the connection reliability of the second sealing ring 333 and the first sealing ring 332, thereby improving the sealing reliability of the two rings.

[0198] Please refer to Figure 15 again. In some embodiments, the electrode post component 3 further includes an insulating support 6, which is disposed on the side of the clamping structure 32 near the electrode component 2.

[0199] For example, the insulating support 6 can extend along the length of the first shell wall 13. The insulating support 6 is provided with a clearance hole to allow the electrode body 31 to pass, so that the conductive part 22 of the electrode component 2 can be connected to the electrode body 31. The insulating support 6 can be a one-piece molded part, or it can include multiple separately molded structural parts.

[0200] In the above technical solution, by setting the insulating support 6, the clamping structure 32 and the active material coating part 21 of the electrode component 2 can be separated, as well as the first shell wall 13 and the active material coating part 21 of the electrode component 2 can be separated, so that the insulating support 6 can meet the insulation requirements.

[0201] The insulating bracket 6 and the second sealing ring 333 are separately configured. Specifically, the insulating bracket 6 and the second sealing ring 333 can have a certain gap, or be in contact, or be connected. By configuring the insulating bracket 6 and the second sealing ring 333 separately, the insulating bracket 6 and the second sealing ring 333 can be formed separately, simplifying the processing difficulty of each structure.

[0202] Of course, the insulating bracket 6 and the second sealing ring 333 can also be integrally formed. Integrating the insulating bracket 6 and the second sealing ring 333 eliminates the need for connection steps, improving production efficiency and enhancing the connection reliability of the insulating bracket 6 and the second sealing ring 333. This, in turn, improves the insulation reliability of the insulating bracket 6 and the sealing reliability of the second sealing ring 333, ultimately enhancing the reliability of the battery cell 10.

[0203] In some embodiments, the pole body 31 includes an inner pole protrusion 313, which is located in the inner ring region of the insulating support 6 and protrudes towards the inner side of the first shell wall 13 relative to the clamping structure 32.

[0204] 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.

[0205] 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.

[0206] Referring again to Figure 14, in some embodiments, the pole piece 3 further includes a second inner insulator 3312, which is at least partially insulatingly fitted between the second clamping portion 3222 at a position away from the first clamping portion 3221 and the pole piece body 31.

[0207] 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 improve the self-insulation of the pole component 3 itself, facilitate the installation and cooperation of the pole component 3 with the first shell wall 13, and save installation time and cost.

[0208] For example, after the electrode body 31, clamping structure 32, first 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 first 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, first sealing ring 332, first inner insulation member 3311, and second inner insulation member 3312 can be directly assembled together.

[0209] Therefore, in the above technical solution, by using the first sealing ring 332 and the second inner insulating member 3312, and in conjunction with the first inner insulating member 3311, the first sealing ring 332, the first inner insulating member 3311 and the second inner insulating member 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.

[0210] Referring again to Figure 15, in some embodiments, the electrode post component 3 further includes an insulating support 6, which is disposed on the side of the clamping structure 32 near the electrode component 2. For example, the insulating support 6 may extend along the length of the first shell wall 13, and the insulating support 6 has clearance holes to allow the electrode post body 31 to pass, so that the conductive portion 22 of the electrode component 2 can be connected to the electrode post body 31. The insulating support 6 may be a single-piece molded part, or it may comprise multiple separately molded structural components.

[0211] In the above technical solution, by setting the insulating support 6, the clamping structure 32 and the active material coating part 21 of the electrode component 2 can be separated, as well as the first shell wall 13 and the active material coating part 21 of the electrode component 2 can be separated, so that the insulating support 6 can meet the insulation requirements.

[0212] The insulating support 6 and the second inner insulating component 3312 are separately configured. Specifically, the insulating support 6 and the second inner insulating component 3312 can have a certain gap, or be in contact, or be connected. By configuring the insulating support 6 and the second inner insulating component 3312 separately, the insulating support 6 and the second inner insulating component 3312 can be formed separately, simplifying the processing difficulty of each structure.

[0213] Of course, the insulating bracket 6 and the second inner insulating component 3312 can also be integrally formed. Integrating the insulating bracket 6 and the second inner insulating component 3312 eliminates the need for connection steps, improving production efficiency and enhancing the connection reliability of the insulating bracket 6 and the second inner insulating component 3312. This, in turn, improves the insulation reliability of the insulating bracket 6 and the second inner insulating component 3312, thereby enhancing the reliability of the battery cell 10.

[0214] Referring again to Figure 8, in some embodiments, the clamping structure 32 further includes a body portion 321, which is disposed on the second clamping portion 3222 and connected to the first shell wall 13. Both the body portion 321 and the clamping member 322 are annular structures. The body portion 321 has a simple structure and can be positioned between the clamping member 322 and the first shell wall 13, thus fixing the clamping member 322 to the first shell wall 13.

[0215] In some embodiments, the main body 321, the first clamping part 3221, and the second clamping part 3222 are integrally formed. The clamping structure 32 has a simple structure, and the integrally formed main body 321, first clamping part 3221, and second clamping part 3222 not only eliminate the connection steps of the three parts, 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.

[0216] In some embodiments, the body portion 321 and the first shell wall 13 are integrally formed. That is, the clamping structure 32 and the first shell wall 13 are integrally formed. By integrally forming the body portion 321 and the first shell wall 13, the connection step between the two can be eliminated, which is beneficial to improving production efficiency. It can also improve the structural strength of the first shell wall 13 and the clamping structure 32, which is beneficial to improving the reliability of the first shell wall 13 and the clamping structure 32.

[0217] In some embodiments, the body portion 321 is welded to the first shell wall 13. For example, the connection can be achieved by laser welding or brazing.

[0218] Specifically, the clamping structure 32, the pole body 31, and the insulating sealing structure 33 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.

[0219] 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 insulating sealing structure 33 and the first shell wall 13 can be simplified, which is conducive to improving production efficiency.

[0220] In some embodiments, the clamping structure 32 is formed as an elongated strip extending along the length direction of the first shell wall 13, and the outline shape of the pole body 31 matches the outline shape of the clamping structure 32.

[0221] For example, the elongated shape can be a rectangle, an ellipse, a racetrack shape, etc. Among them, the "racetrack shape" is an oblong shape. An oblong shape can be roughly considered to be composed of a rectangle and two semicircles. The outline of an oblong shape can be roughly considered to be the outline of a rectangle after the two short sides of the rectangle are replaced by two circular arcs.

[0222] As mentioned above, the electrode component 2 is connected to the electrode post component 3 through the conductive part 22. When the outline shape of the electrode post body 31 is formed into an elongated shape that matches the outline shape of the clamping structure 32, the area of ​​the electrode post body 31 is larger, which is beneficial to increase the connection area between the conductive part 22 and the electrode post body 31, thereby improving the charging performance.

[0223] Of course, the pole body 31 can also be other shapes. For example, the pole body 31 is located in the center of the clamping structure 32 and has a circular outline. As a result, the connection between the clamping structure 32 and the pole body 31 is subjected to uniform force, making it easy to control the compression of the insulating sealing structure 33, thereby improving the reliability of the sealing fit between the two. Moreover, the sealing area is relatively small, making it less prone to failure.

[0224] In some embodiments, the clamping structure 32 is formed as a ring, and the contour shape of the pole body 31 matches the contour shape of the clamping structure 32. As a result, the connection position between the clamping structure 32 and the pole body 31 is subjected to uniform force, making it easy to control the compression of the insulating sealing structure 33, thereby improving the reliability of the sealing fit between the two. Moreover, the sealing area is relatively small, making it less prone to failure.

[0225] 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 has an opening 110, and the end of the shell body 11 opposite to the opening 110 is 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 also flexible.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] The insulating sealing structure 33 includes an inner insulating element 331 and a first 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.

[0235] For example, as shown in FIG13, the insulating sealing structure 33 may include a first inner insulating member 3311, a first sealing ring 332, and a second inner insulating member 3312. A portion of 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, and another portion is disposed between the side of the flange portion 312 away from the electrode component 2 and the first clamping portion 3221. A portion of the first sealing ring 332 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, and another portion is clamped between the side of the flange portion 312 facing the electrode component 2 and the second clamping portion 3222. 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.

[0236] For example, as shown in FIG14, the insulating sealing structure 33 may include a first inner insulating member 3311, a first sealing ring 332, and a second inner insulating member 3312. The first inner insulating member 3311 is sandwiched 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 first sealing ring 332 is sandwiched between the first clamping portion 3221 and the radially outer side of the flange portion 312, a portion is sandwiched between the side of the flange portion 312 away from the electrode component 2 and the first clamping portion 3221, and another portion is sandwiched between the side of the flange portion 312 facing the electrode component 2 and the second clamping portion 3222. The second inner insulating member 3312 is sandwiched between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the electrode body 31.

[0237] For example, as shown in FIG15, the insulating sealing structure 33 may include a first inner insulating member 3311, a first sealing ring 332 and a second sealing ring 333. A portion of the first inner insulating member 3311 is disposed between the first clamping portion 3221 and the radially outer side of the flange portion 312, and another portion is disposed between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31. The first sealing ring 332 is disposed between the second clamping portion 3222 and the flange portion 312. One end of the first sealing ring 332 extends to the connection position of the first clamping portion 3221 and the second clamping portion 3222 or the radially outer side of the flange portion 312, and the other end extends to the end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31. The second sealing ring 333 is clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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 component is disposed on the first shell wall and includes an electrode body, a clamping structure, and an insulating sealing structure; the electrode body is connected to the electrode component; the clamping structure surrounds the electrode body and is connected to the first shell wall, the clamping structure has a clamping groove for clamping the electrode body, and in the thickness direction of the first shell wall, the clamping groove includes a first corner and a second corner spaced apart, the first corner being close to the electrode component; The insulating sealing structure is disposed between the clamping structure and the pole body, and is at least sealed between the pole body and the first corner.

2. The battery cell according to claim 1, wherein, The clamping structure includes a first clamping part and a second clamping part, the first clamping part and the second clamping part defining the clamping groove, and the connection between the first clamping part and the second clamping part forming the first corner; the insulating sealing structure includes a first sealing ring, the first sealing ring being sealed between the pole body and the first corner.

3. The battery cell according to claim 2, wherein, The first sealing ring includes a first sealing portion, which is sealed between the second clamping portion and the pole body, and extends at least partially to the first corner.

4. The battery cell according to claim 3, wherein, The first sealing ring further includes a second sealing part, which is angled to the first sealing part, and the second sealing part is sealed between the first clamping part and the pole body.

5. The battery cell according to claim 4, wherein, Before compression, the second sealing part is set at a first preset angle to the first sealing part, and the first clamping part and the second clamping part are set at a second preset angle, wherein the first preset angle is greater than the second preset angle.

6. The battery cell according to claim 4, wherein, In the thickness direction of the first shell wall, the dimension of the first sealing part before compression is L1, the gap between the second clamping part and the pole body is L2, and the ratio of L1 to L2 is greater than 1.

2.

7. The battery cell according to claim 4, wherein, The first sealing ring further includes a third sealing part, which is disposed opposite to the first sealing part in the thickness direction of the first shell wall, and the second sealing part is connected between the first sealing part and the third sealing part; The third sealing part and the second sealing part are arranged at an angle, and the third sealing part is sealed between the first clamping part and the side of the pole body away from the electrode component.

8. The battery cell according to claim 2, wherein, The periphery of the pole 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; The first sealing ring is disposed between the flange portion and the first clamping portion, and between the side of the flange portion facing the electrode component and the second clamping portion.

9. The battery cell according to claim 8, wherein, The pole post component also includes an outer insulating member, which at least partially covers the side of the first clamping portion opposite to the flange portion.

10. The battery cell according to claim 9, wherein, The end surface of the electrode body facing away from the electrode component is smoothly connected to the side surface of the outer insulating member facing away from the flange portion, or the electrode body at least partially protrudes from the side surface of the outer insulating member facing away from the flange portion.

11. The battery cell according to claim 9, wherein, The first clamping part includes a first extension section, a second extension section and an arc extension section. The first extension section is arranged around the periphery of the electrode body, and the second extension section is located on the side of the electrode body away from the electrode component. The first extension section and the second extension section are connected by the arc 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.

12. The battery cell according to claim 11, wherein, The surface of the second insulating section facing away from the second extension section is not higher than the surface of the pole body facing away from the electrode component.

13. The battery cell according to claim 9, wherein, The periphery of the end surface of the pole body opposite to the electrode component has a step, and the outer insulating member extends at least partially to the side of the step near the flange portion so as to be flush with the step surface.

14. The battery cell according to claim 9, wherein, The pole post component further includes a first inner insulating member, which is at least partially insulatingly fitted between the flange portion and the first clamping portion, and is located between the first sealing ring and the outer insulating member.

15. The battery cell according to claim 14, wherein, The first inner insulating member is at least partially insulatingly fitted between the side of the flange portion away from the electrode component and the first clamping portion; and / or, the end of the first clamping portion away from the second clamping portion is between the pole body.

16. The battery cell according to claim 14, wherein, The first sealing ring is at least partially sealed between the side of the flange portion away from the electrode component and the first clamping portion, and the first inner insulating member is at least partially insulatingly fitted between the end of the first clamping portion away from the second clamping portion and the electrode body.

17. The battery cell according to claim 14, wherein, The outer insulating component and the first inner insulating component are separately provided; or, the outer insulating component and the first inner insulating component are integrally formed.

18. The battery cell according to claim 14, wherein, The first inner insulating component and the first sealing ring are separate components; or, the first inner insulating component and the first sealing ring are integrally formed.

19. The battery cell according to claim 14, wherein, The outer insulating component, the first inner insulating component, and the first sealing ring are integrally formed.

20. The battery cell according to any one of claims 2-19, wherein, The pole piece further includes a second sealing ring, which is at least partially sealed between the second clamping portion and the pole body at a position away from the first clamping portion.

21. The battery cell according to claim 20, wherein, The second sealing ring is separate from the first sealing ring; or, the second sealing ring and the first sealing ring are integrally formed.

22. The battery cell according to claim 20, wherein, The electrode component also includes an insulating support, which is disposed on the side of the clamping structure near the electrode component; The insulating bracket and the second sealing ring are separately configured; or, the insulating bracket and the second sealing ring are integrally formed.

23. The battery cell according to any one of claims 2-19, wherein, The pole piece further includes a second inner insulating member, which is at least partially insulatingly fitted between the second clamping portion and the pole piece body at a position away from the first clamping portion.

24. The battery cell according to claim 23, wherein, The electrode component also includes an insulating support, which is disposed on the side of the clamping structure near the electrode component; The insulating bracket and the second inner insulating component are separately configured; or, the insulating bracket and the second inner insulating component are integrally formed.

25. The battery cell according to any one of claims 2-24, wherein, The clamping structure further includes a body portion, which is circumferentially disposed around the second clamping portion and is connected to the first shell wall.

26. The battery cell according to claim 25, wherein, The main body, the first clamping part, and the second clamping part are integrally formed; Alternatively, the main body is integrally formed with the first shell wall; Alternatively, the main body is welded to the first shell wall.

27. The battery cell according to any one of claims 1-26, wherein, The clamping structure is formed as an elongated strip extending along the length of the first shell wall, and the outline shape of the pole body matches the outline shape of the clamping structure; or, the pole body is located in the center of the clamping structure and has a circular outline.

28. The battery cell according to any one of claims 1-26, wherein, The clamping structure is formed in a circular ring shape, and the outline shape of the pole body matches the outline shape of the clamping structure.

29. The battery cell according to any one of claims 1-28, 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 shell body opposite the opening is the first shell wall; or, the shell cover is the first shell wall.

30. The battery cell according to any one of claims 1-29, 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.

31. A battery device, wherein, Includes the battery cell according to any one of claims 1-30.

32. An electrical appliance, wherein, Includes the battery device according to claim 31.

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