Battery cell, battery device and electric device

Abstract

A battery cell, a battery device and an electric device. The battery cell comprises a casing component, an electrode component and terminal components, wherein the casing component comprises a first casing wall. The terminal components each comprise a terminal body, a clamping structure and an insulating sealing structure, wherein the clamping structure comprises a body portion and a clamping member. The clamping member comprises a first clamping portion and a second clamping portion, wherein the first clamping portion and the second clamping portion clamp the terminal body by means of the insulating sealing structure; the thickness of the first clamping portion is different from the thickness of the body portion; the thickness of the second clamping portion is different from the thickness of the body portion; and the thickness of the one having the greatest thickness among the first clamping portion, the second clamping portion and the body portion is greater than the thickness of the first casing wall. In the technical solution of the embodiments of the present application, by means of adjusting the thickness of the first casing wall, the thickness of the first clamping portion, the thickness of the second clamping portion, or the thickness of the body portion, the insulation performance and reliability of the terminal components are improved, thereby being conducive to 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] Poor sealing between the terminals and the casing of the battery cells in related technologies leads to reduced reliability of the battery cells.

[0004] Summary of the Invention

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

[0006] In a first aspect, this application provides a battery cell, comprising: a housing component, the housing component including a first housing wall; an electrode component, the electrode component being housed within the housing component; and a terminal component, the terminal component being disposed on the first housing wall and 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 including a body portion and a clamping member, the body portion being disposed around the outer periphery of the clamping member and connected to the first housing wall, the clamping member being disposed on the body portion, the clamping member including a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion clamping the terminal body through the insulating sealing structure; wherein, the thickness of the first clamping portion is different from that of the body portion, the thickness of the second clamping portion is different from that of the body portion, and the thickness of the largest of the three components—the first clamping portion, the second clamping portion, and the body portion—is greater than the thickness of the first housing wall.

[0007] In the technical solution of this application embodiment, by setting a clamping structure and using it in conjunction with an insulating and sealing structure, the electrode post body can be fixedly installed on the clamping structure, and insulation and sealing between the clamping structure and the electrode post body can be achieved. The main body of the clamping structure is used to connect with the first shell wall, and the first clamping part and the second clamping part of the clamping structure are used to clamp the electrode post body and the insulating and sealing structure. Therefore, as needed, by adjusting the thickness of the first shell wall, the thickness of the first clamping part, the thickness of the second clamping part, or the thickness of the main body, the insulation performance and reliability of the electrode post component can be further improved, the risk of short circuit problems or other electrical safety accidents can be reduced, and the probability of electrolyte seepage from the inside of the shell component and moisture and dust entering the shell component can be reduced, which is beneficial to improving the reliability of the battery cell.

[0008] In some embodiments, the first clamping portion is connected to the side of the second clamping portion away from the electrode component, and the insulating sealing structure is clamped between the first clamping portion and the electrode body, and between the second clamping portion and the electrode body. In the above technical solution, the insulating sealing structure can be arranged around the outer periphery of the electrode body, with a portion of the insulating sealing structure clamped between the first clamping portion and the electrode body, and another portion clamped between the second clamping portion and the electrode body, thereby achieving insulation and sealing between the clamping structure and the electrode body.

[0009] In some embodiments, the main body, the first clamping part, and the second clamping part are integrally formed. In the above technical solution, the clamping structure is simple in structure, and the main body, the first clamping part, and the second clamping part can be constructed as an integral part. This not only eliminates the connection steps of the three parts, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure. This can improve the reliability of the insulation and sealing of the insulating and sealing structure, so that the insulating and sealing structure can meet the required insulation and sealing requirements.

[0010] In some embodiments, the body portion and the first shell wall are integrally formed; or, the body portion and the first shell wall are welded together. In the above technical solutions, by integrally forming the body portion and the first shell wall, the connection step can be eliminated, which is beneficial to improving production efficiency. It also improves the structural strength of the clamping structure and the first shell wall, thus improving the reliability of the first shell wall and the clamping structure, and enhancing the installation stability and reliability of the pole piece on the first shell wall. Furthermore, by welding the body portion to the first shell wall, the assembly steps of the clamping structure, the pole body, the insulating sealing structure, and the first shell wall can be simplified, which is beneficial to improving production efficiency.

[0011] In some embodiments, the main body, the first clamping part, and the second clamping part are integrally formed. In the above technical solution, the clamping structure is simple in structure, and the main body, the first clamping part, and the second clamping part can be constructed as an integral part. This not only eliminates the connection steps of the three parts, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure. This can improve the reliability of the insulation and sealing of the insulating and sealing structure, so that the insulating and sealing structure can meet the required insulation and sealing requirements.

[0012] In some embodiments, the thickness of the body portion is greater than the thickness of the first shell wall. In the above technical solution, by reducing the thickness of the first shell wall, on the one hand, the weight of the shell component can be reduced, making it easier to achieve lightweighting of the battery cell and reducing transportation costs; on the other hand, the amount of material used in the first shell wall can be reduced, which helps to reduce material costs. By increasing the thickness of the body portion, the structural strength of the body portion can be improved. On the one hand, the connection reliability between the body portion and the first shell wall can be improved, enhancing the reliability of the terminal component on the first shell wall, thus making the battery cell more reliable. On the other hand, the structural strength of the clamping structure can be improved, thereby enhancing the pressure resistance of the terminal component and further improving the reliability of the battery cell.

[0013] In some embodiments, the thickness of the second clamping portion is less than the thickness of the main body portion. In the above technical solution, by reducing the thickness of the second clamping portion, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the amount of material used in the clamping structure, which helps reduce material costs. By increasing the thickness of the main body portion, the structural strength of the main body portion can be improved. On the one hand, this improves the connection reliability between the main body portion and the first shell wall, enhancing the reliability of the electrode component on the first shell wall, thus making the battery cell more reliable. On the other hand, it improves the structural strength of the clamping structure, thereby improving the pressure resistance of the electrode component and further enhancing the reliability of the battery cell.

[0014] In some embodiments, the thickness of the second clamping portion is greater than half the thickness of the main body portion. In the above technical solution, by limiting the thickness of the second clamping portion to be greater than half the thickness of the main body portion, the structural strength and rigidity of the second clamping portion can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping portion on the pole body when used in conjunction with the first clamping portion, thus improving the installation reliability of the pole body. On the other hand, it allows the second clamping portion to press against the insulating sealing structure, improving the performance of the insulating sealing structure, thereby enabling the insulating sealing structure to meet the requirements of insulation sealing.

[0015] In some embodiments, the thickness of the first clamping portion is less than the thickness of the body portion, and / or the thickness of the first clamping portion is less than the thickness of the second clamping portion. In the above technical solution, by reducing the thickness of the first clamping portion, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps reduce material costs. By increasing the thickness of the body portion, the structural strength of the body portion can be improved. On the one hand, this improves the connection reliability between the body portion and the first shell wall, enhancing the reliability of the electrode post component on the first shell wall, thus making the battery cell more reliable. On the other hand, it improves the structural strength of the clamping structure, thereby improving the pressure resistance performance of the electrode post component, further enhancing the reliability of the battery cell. By increasing the thickness of the second clamping portion, the structural strength and rigidity of the second clamping portion can be improved. On the one hand, this improves the clamping ability of the second clamping portion on the electrode post body when used in conjunction with the first clamping portion, enhancing the installation reliability of the electrode post body. On the other hand, it allows the second clamping portion to press against the insulating sealing structure, improving the performance of the insulating sealing structure, thus enabling the insulating sealing structure to meet the insulation sealing requirements.

[0016] In some embodiments, the first clamping part and the second clamping part are stamped parts. In the above technical solution, by using a stamping process to process the first clamping part and the second clamping part, the structural strength and rigidity of the clamping structure can be improved, and the processing efficiency of the clamping structure can be improved, thereby reducing production costs.

[0017] In some embodiments, the thickness of the second clamping part is greater than the thickness of the main body part. In the above technical solution, by increasing the thickness of the second clamping part, the structural strength and rigidity of the second clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part on the pole body when used in conjunction with the first clamping part, thereby improving the installation reliability of the pole body. On the other hand, it allows the second clamping part to press the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulation sealing.

[0018] In some embodiments, the thickness of the first clamping part is greater than the thickness of the main body. In the above technical solution, by increasing the thickness of the first clamping part, the structural strength and rigidity of the first clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part and the second clamping part when used together, thereby improving the installation reliability of the main body. On the other hand, it allows the first clamping part to press the insulating sealing structure, improving the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulation sealing. By reducing the thickness of the main body, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps to reduce material costs.

[0019] In some embodiments, the thickness of the first clamping part is less than the thickness of the second clamping part. In the above technical solution, by reducing the thickness of the first clamping part, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps to reduce material costs. By increasing the thickness of the second clamping part, the structural strength and rigidity of the second clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part on the electrode body when used in conjunction with the first clamping part, improving the installation reliability of the electrode body. On the other hand, it allows the second clamping part to press the insulation sealing structure, improving the performance of the insulation sealing structure, thereby enabling the insulation sealing structure to meet the insulation sealing requirements.

[0020] In some embodiments, the first clamping part and the body part are stamped parts. In the above technical solution, by using a stamping process to process the first clamping part and the body part, the structural strength and rigidity of the clamping structure can be improved, and the processing efficiency of the clamping structure can be improved, thereby reducing production costs.

[0021] In some embodiments, the thickness of the second clamping portion is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the second clamping portion, the structural strength and rigidity of the second clamping portion can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping portion on the electrode body when used in conjunction with the first clamping portion, thereby improving the installation reliability of the electrode body. On the other hand, it allows the second clamping portion to press the insulating sealing structure, enabling the insulating sealing structure to meet the insulation sealing requirements. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell components can be reduced, making it easier to achieve lightweighting of the battery cell and reducing transportation costs. On the other hand, it can reduce the amount of material used in the first shell wall, which helps to reduce material costs.

[0022] In some embodiments, the thickness of the first clamping part is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the first clamping part, the structural strength and rigidity of the first clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part and the second clamping part when used together, thereby improving the installation reliability of the electrode body. On the other hand, it allows the first clamping part to press the insulating sealing structure, so that the insulating sealing structure can meet the insulation sealing requirements. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell components can be reduced, making it easier to achieve lightweighting of the battery cell and reducing transportation costs. On the other hand, it can reduce the material used in the first shell wall, thereby reducing material costs.

[0023] In some embodiments, the thickness of the structure with the smaller thickness between the body portion and the second clamping portion is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm. In the above technical solution, by limiting the thickness of the structure with the smaller thickness between the body portion and the second clamping portion to meet the above conditions, the structural strength of the clamping structure can be improved, thereby enhancing the reliability of the pole piece.

[0024] In some embodiments, the thickness of the body portion is less than the thickness of the first shell wall. In the above technical solution, by reducing the thickness of the body portion, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps to reduce material costs. By increasing the thickness of the first shell wall, the structural strength of the first shell wall can be improved, thereby enhancing the first shell wall's resistance to external impacts and reducing the risk of deformation of the first shell wall. On the one hand, this can improve the reliability of the first shell wall in supporting the terminal post component, and on the other hand, it can improve the strength of the connection between the first shell wall and the body portion, improving the reliability of the terminal post component on the first shell wall, and making the battery cell more reliable.

[0025] In some embodiments, the thickness of the second clamping part is greater than the thickness of the main body part. In the above technical solution, by increasing the thickness of the second clamping part, the structural strength and rigidity of the second clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part on the pole body when used in conjunction with the first clamping part, thereby improving the installation reliability of the pole body. On the other hand, it allows the second clamping part to press the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulation sealing.

[0026] In some embodiments, the thickness of the body portion is greater than half the thickness of the second clamping portion. In the above technical solution, by limiting the thickness of the body portion to be greater than half the thickness of the second clamping portion, the structural strength of the body portion can be improved, thereby improving the connection reliability between the clamping body portion and the first shell wall, further improving the installation reliability of the pole post component, and also improving the insulation sealing strength of the insulation sealing structure.

[0027] In some embodiments, the thickness of the second clamping portion is less than the thickness of the main body portion. In the above technical solution, by reducing the thickness of the second clamping portion, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps to reduce material costs; by increasing the thickness of the main body portion, the structural strength of the main body portion can be improved, thereby improving the connection reliability between the clamping body portion and the first shell wall, and further improving the installation reliability of the electrode post component, and also improving the insulation and sealing strength of the insulation and sealing structure.

[0028] In some embodiments, the thickness of the first clamping part is greater than the thickness of the main body. In the above technical solution, by increasing the thickness of the first clamping part, the structural strength and rigidity of the first clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part and the second clamping part when used together, thereby improving the installation reliability of the main body. On the other hand, it allows the first clamping part to press the insulating sealing structure, improving the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulation sealing. By reducing the thickness of the main body, the weight of the clamping structure can be reduced, thereby facilitating the lightweighting of the battery cell, reducing transportation costs, and also reducing the materials used in the clamping structure, which helps to reduce material costs.

[0029] In some embodiments, the thickness of the second clamping portion is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the second clamping portion, the structural strength and rigidity of the second clamping portion can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping portion on the electrode body when used in conjunction with the first clamping portion, thereby improving the installation reliability of the electrode body. On the other hand, it allows the second clamping portion to press the insulating sealing structure, enabling the insulating sealing structure to meet the insulation sealing requirements. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell components can be reduced, making it easier to achieve lightweighting of the battery cell and reducing transportation costs. On the other hand, it can reduce the amount of material used in the first shell wall, which helps to reduce material costs.

[0030] In some embodiments, the thickness of the first clamping part is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the first clamping part, the structural strength and rigidity of the first clamping part can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part and the second clamping part when used together, thereby improving the installation reliability of the electrode body. On the other hand, it allows the first clamping part to press the insulating sealing structure, so that the insulating sealing structure can meet the insulation sealing requirements. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell components can be reduced, making it easier to achieve lightweighting of the battery cell and reducing transportation costs. On the other hand, it can reduce the material used in the first shell wall, thereby reducing material costs.

[0031] In some embodiments, the thickness of the structure with the smaller thickness between the body portion and the second clamping portion is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm. In the above technical solution, by limiting the thickness of the structure with the smaller thickness between the body portion and the second clamping portion to meet the above conditions, the structural strength of the clamping structure can be improved, thereby enhancing the reliability of the pole piece.

[0032] In some embodiments, the terminal post component further includes an outer insulating member that at least partially covers the side of the first clamping portion away from the insulating sealing structure. In the above technical solution, the outer insulating member separates the clamping structure and the busbar component, insulating the clamping structure and the busbar component, and the first housing wall and the busbar component, thereby reducing short-circuit problems and improving the reliability of the battery cell.

[0033] In some embodiments, the surface of the outer insulating member facing away from the first clamping portion is smoothly connected to the surface of the terminal body facing away from the electrode component. This configuration simplifies the external structure of the battery cell, making it more aesthetically pleasing, and also reduces the blocking effect of the outer insulating member on the busbar component, thereby improving the connection reliability between the terminal body and the busbar component.

[0034] In some embodiments, the periphery of the end surface of the electrode body facing away from the electrode component has a step; the outer insulating member extends at least partially to the step, or the outer insulating member extends at least partially to one side of the step to be flush with the step surface. In the above technical solution, by providing a step on the electrode body, the contact area between the outer insulating member and the electrode body can be increased, thereby increasing the connection reliability between the outer insulating member and the electrode body, making the insulation reliability between the bus component and the clamping structure higher, and the outer insulating member is connected to the insulating sealing structure, which can completely separate the electrode body and the clamping structure, making the insulation reliability between the electrode body and the clamping structure higher.

[0035] In some embodiments, the step is an annular structure, and the outer insulating member surrounds the first clamping portion. In the above technical solution, by setting the step as an annular structure, the contact area between the outer insulating member and the electrode body can be further increased, thereby increasing the connection reliability between the outer insulating member and the electrode body, and making the insulation reliability between the busbar component and the clamping structure higher.

[0036] In some embodiments, the external insulating component is connected to the insulating sealing structure. In the above technical solution, by connecting the external insulating component to the insulating sealing structure, the installation reliability of the external insulating component can be improved, thereby further improving the insulation reliability between the clamping structure and the busbar component, and between the first shell wall and the busbar component. Furthermore, the connection between the external insulating component and the insulating sealing structure can further improve the insulation reliability between the clamping structure and the terminal body, thereby improving the reliability of the battery cell in use.

[0037] In some embodiments, the first clamping portion includes a first extension section, a second extension section, and an arc-shaped extension section. The first extension section is arranged around the periphery of the electrode body and connected to the second clamping portion. The second extension section is located on the side of the electrode body away from the electrode component and is arranged at a distance from the second clamping portion. The first extension section and the second extension section are connected by the arc-shaped extension section. The outer insulating member includes a first insulating section, a second insulating section, and an arc-shaped insulating section. The first insulating section covers the side of the first extension section away from the electrode body, and the second insulating section covers the side of the second extension section away from the electrode body. The first insulating section and the second insulating section are connected by the arc-shaped insulating section. In the above technical solution, by setting the first clamping portion to include the first extension section, the second extension section, and the arc-shaped extension section, and setting the outer insulating member to include the first insulating section, the second insulating section, and the arc-shaped insulating section, damage to the outer insulating member by the electrode body is reduced, thereby improving the insulation reliability of the outer insulating member.

[0038] In some embodiments, the surface of the second insulating section facing away from the second extension section is in the same plane as the surface of the electrode body facing away from the electrode component; or, the electrode body partially protrudes from the surface of the second insulating section facing away from the second extension section. 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, interference of the electrode component to other components outside the housing component (such as busbar components) can be reduced, thereby improving the reliability of the battery cell.

[0039] 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. The first clamping portion and the second clamping portion clamp the flange portion on both sides along the thickness direction through an insulating sealing structure. In the above technical solution, by providing a flange portion on the peripheral side of the electrode body, and the first clamping portion and the second clamping portion being located on both sides of the flange portion in the thickness direction of the first shell wall, the movement of the electrode body relative to the clamping structure toward the direction away from or toward the electrode component is restricted. The structure of the flange portion is simple and easy to process.

[0040] In some embodiments, the insulating sealing structure includes a first inner insulating member and a sealing ring. The first inner insulating member is disposed between the first clamping portion and the flange portion, and the sealing ring is disposed between the second clamping portion and the flange portion. By providing the first inner insulating member between the first clamping portion and the flange portion, insulation between the electrode post body and the clamping structure can be achieved. By providing the sealing ring between the second clamping portion and the flange portion, sealing between the electrode post body and the clamping structure can be achieved. This gives the electrode post component self-insulating and sealing properties, facilitating the installation and mating of the electrode post component with the first shell wall, and saving installation time and costs.

[0041] In some embodiments, the insulating sealing structure includes an integrally formed sealing ring, which is simultaneously located between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion. In the above technical solution, by simultaneously placing the integrally formed sealing ring between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion, multi-directional and multi-position sealing fit can be achieved, reducing sealing failure and improving the sealing effect of the sealing ring, thereby meeting the required sealing requirements.

[0042] In some embodiments, the insulating sealing structure includes a first inner insulating member, a sealing ring, and a second inner insulating member. The first inner insulating member is disposed between the first clamping portion and the flange portion. The sealing ring is disposed between the connection position of the first clamping portion and the second clamping portion and the flange portion. The second inner insulating member is disposed between the second clamping portion and the flange portion at a position away from the first clamping portion. In the above technical solution, by employing the first inner insulating member, the sealing ring, and the second inner insulating member, and by rationally arranging the sealing ring, the first inner insulating member, and the second inner insulating member between the terminal body and the clamping structure, insulation and sealing failures can be reduced, and the insulation and sealing effect between the terminal body and the clamping structure can be better improved. This can reduce the risk of short circuits or other electrical safety accidents, and also 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.

[0043] In some embodiments, the clamping structure is formed as an elongated strip extending along the length of the first shell wall; the outline shape of the electrode body matches the outline shape of the clamping structure, or the electrode body is located in the center of the clamping structure and has a circular outline. This configuration results in a larger area for the electrode body, which is beneficial for increasing the connection area between the conductive part and the electrode body, thereby improving charging performance.

[0044] 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 that the connection between the clamping structure and the pole body is subjected to uniform force, making it easier to control the compression of the insulating sealing structure, thereby improving the reliability of the sealing fit between the two. Moreover, the sealing area is relatively small, making it less prone to failure.

[0045] In some embodiments, the housing component includes a housing body with 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. In the above technical solution, the structural design of the housing component is flexible, and the placement position of the pole component is flexible.

[0046] In some embodiments, the battery cell further includes a pressure relief device, which is located on the housing component and on the same side or opposite side to the terminal component. In the above technical solution, by providing a pressure relief device, when the pressure inside the housing component exceeds a preset value, the pressure can be directionally released through the pressure relief device, thereby improving the safety and reliability of the battery cell.

[0047] 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.

[0048] 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.

[0049] 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

[0050] 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:

[0051] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0052] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0053] Figure 3 is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0054] Figure 4 is an exploded view of the structure of the battery cell shown in Figure 3;

[0055] Figure 5 is a top view of a battery cell according to some embodiments of this application;

[0056] Figure 6 is a cross-sectional view along line AA in Figure 5;

[0057] Figure 7 is a schematic diagram of the structure of the electrode component on the first shell wall in some embodiments of this application;

[0058] Figure 8 is a cross-sectional view of the structure along line B2-B2 in Figure 7;

[0059] Figure 9 is a cross-sectional view of the structure along line C2-C2 in Figure 7;

[0060] Figure 10 is a structural cross-sectional view of the electrode components of some other embodiments of this application;

[0061] Figure 11 is a schematic diagram of the structure of the electrode component on the first shell wall in some other embodiments of this application;

[0062] Figure 12 is a cross-sectional view of the structure along line D2-D2 in Figure 11;

[0063] Figure 13 is a cross-sectional view of the structure along line E2-E2 in Figure 11;

[0064] Figure 14 is a structural cross-sectional view of the electrode components of some other embodiments of this application;

[0065] Figure 15 is a schematic diagram of the structure of the pole post component on the first shell wall in some embodiments of this application;

[0066] Figure 16 is an exploded view of the structure of the pole post component and the first shell wall shown in Figure 15;

[0067] Figure 17 is a partial enlarged view of the pole post component and the first shell wall shown in Figure 16;

[0068] Figure 18 is a partial enlarged view of the pole post component of some other embodiments of this application;

[0069] Figure 19 is a structural schematic diagram of the pole post component according to some other embodiments of this application;

[0070] Figure 20 is a structural schematic diagram of the pole post component in some embodiments of this application;

[0071] Figure 21 is a structural schematic diagram of the pole component of some other embodiments of this application.

[0072] The reference numerals in the detailed embodiments are as follows: Vehicle 1000, Battery device 100, Housing assembly 101, Housing cover 1011, Housing 1012, Controller 200, Motor 300, Battery cell 10, Housing component 1, Housing body 11, Opening 110, Housing cover 12, First housing wall 13, Mounting hole 131, Second housing wall 14, Electrode component 2, Active material coating part 21, Conductive part 22, Terminal component 3, Receiving groove 301, Terminal body 31, Step 311, Flange part 312, Inner protrusion of terminal 313, Clamping structure 32, Clamping groove 3201, 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, insulating sealing structure 33, inner insulating component 331, first inner insulating component 3311, second inner insulating component 3312, sealing ring 332, first sealing part 3321, second sealing part 3322, third sealing part 3323, outer insulating component 34, first insulating section 341, second insulating section 342, arc insulating section 343, pressure relief device 4, insulating film 5, insulating support 6. Detailed Implementation

[0073] 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.

[0074] 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 of this application are intended to cover non-exclusive inclusion.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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).

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Poor sealing between the terminals and the casing of the battery cell in the relevant technology not only easily leads to short circuits or other electrical safety risks, but also causes electrolyte to leak from the casing components and moisture and dust to enter the casing components, ultimately resulting in a decrease in the reliability of the battery cell.

[0083] Therefore, embodiments of this application propose a battery cell that uses a first clamping part and a second clamping part of a clamping structure to clamp the electrode body and the insulating sealing structure. As needed, by adjusting the thickness of the first shell wall, the thickness of the first clamping part, the thickness of the second clamping part, or the thickness of the body part, the insulation performance and reliability of the electrode component can be further improved, the risk of short circuit problems or other electrical safety accidents can be reduced, and the probability of electrolyte seepage from the inside of the shell component and the entry of moisture and dust into the shell component can be reduced.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] Please refer to Figures 3-6. Figure 3 is a schematic diagram of the structure of a battery cell 10 according to some embodiments of this application; Figure 4 is an exploded view of the structure of the battery cell 10 shown in Figure 3; Figure 5 is a top view of the battery cell 10 according to some embodiments of this application; and Figure 6 is a cross-sectional view along line AA in Figure 5. The battery cell 10 includes a housing component 1, an electrode component 2, a terminal component 3, and other functional components.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] According to some embodiments of this application, referring to Figures 4 and 6, and further referring to Figure 7, Figure 7 is a schematic structural diagram of the electrode component 2 on the first shell wall 13 according to some embodiments of this application. The shell component 1 includes the first shell wall 13, which participates in forming a receiving cavity. The material of the first shell wall 13 is not limited.

[0098] 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.

[0099] 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.

[0100] Please refer to Figures 8 and 9. Figure 8 is a cross-sectional view of the structure along line B2-B2 in Figure 7; Figure 9 is a cross-sectional view of the structure along line C2-C2 in Figure 7. The electrode post component 3 includes an electrode post body 31 and a clamping structure 32. The electrode post body 31 is connected to the electrode component 2, and the clamping structure 32 surrounds the electrode post body 31. The shapes of the clamping structure 32 and the electrode post body 31 are not limited; for example, either one can be processed into a circle, ellipse, rectangle, or rectangle with rounded corners, etc.

[0101] Specifically, the clamping structure 32 includes a body portion 321 and a clamping member 322. The body portion 321 is arranged around the outer periphery of the clamping member 322 and is connected to the first shell wall 13. The clamping member 322 is disposed on the body portion 321 and can define a clamping groove 3201. The clamping groove 3201 is used to clamp the pole body 31, thereby fixing the pole body 31 on the clamping structure 32.

[0102] The clamping member 322 includes a first clamping part 3221 and a second clamping part 3222, which clamp the terminal body 31. The terminal component 3 also includes an insulating sealing structure 33. The first clamping part 3221 and the second clamping part 3222 clamp the terminal body 31 through the insulating sealing structure 33, so that the insulating sealing structure 33 insulates and seals the clamping member 322 and the terminal body 31. This can reduce the risk of short circuits or other electrical safety accidents, and also reduce the probability of electrolyte seepage from the inside of the housing component 1 and the entry of moisture and dust into the housing component 1, thereby improving the reliability of the battery cell 10.

[0103] The first clamping part 3221 has a different thickness than the main body part 321, and the second clamping part 3222 has a different thickness than the main body part 321. Specifically, the thickness of the first clamping part 3221 is K1, the thickness of the second clamping part 3222 is K2, and the thickness of the main body part 321 is K3. K1, K2, and K3 are not equal and can be flexibly selected according to needs.

[0104] Furthermore, the thickness of the thickest of the three components—the first clamping part 3221, the second clamping part 3222, and the main body part 321—is greater than the thickness of the first shell wall 13.

[0105] For example, among the first clamping portion 3221, the second clamping portion 3222, and the body portion 321, the body portion 321 has the greatest thickness, and its thickness is greater than that of the first shell wall 13. For example, among the first clamping portion 3221, the second clamping portion 3222, and the body portion 321, the first clamping portion 3221 has the greatest thickness, and its thickness is greater than that of the first shell wall 13. For example, among the first clamping portion 3221, the second clamping portion 3222, and the body portion 321, the second clamping portion 3222 has the greatest thickness, and its thickness is greater than that of the first shell wall 13.

[0106] In the technical solution of this application embodiment, by setting a clamping structure 32 and using it in conjunction with an insulating and sealing structure 33, the electrode body 31 can be fixedly installed on the clamping structure 32, and insulation and sealing between the clamping structure 32 and the electrode body 31 can be achieved. The body part 321 of the clamping structure 32 is used to connect with the first shell wall 13, and the first clamping part 3221 and the second clamping part 3222 of the clamping structure 32 are used to clamp the electrode body 31 and the insulating and sealing structure 33. Therefore, as needed, by adjusting the thickness of the first shell wall 13, the thickness of the first clamping part 3221, the thickness of the second clamping part 3222, or the thickness of the body part 321, the insulation performance and reliability of the electrode component 3 can be further improved, the risk of short circuit problems or other electrical safety accidents can be reduced, and the probability of electrolyte seepage from the inside of the shell component 1 and moisture and dust entering the shell component 1 can be reduced, which is beneficial to improving the reliability of the battery cell 10.

[0107] Referring again to Figure 9, in some embodiments, the first clamping part 3221 is connected to the side of the second clamping part 3222 away from the electrode component 2, and the insulating sealing structure 33 is clamped between the first clamping part 3221 and the electrode body 31, and between the second clamping part 3222 and the electrode body 31.

[0108] Specifically, the first clamping part 3221 and the second clamping part 3222 are arranged in the height direction of the active material coating part 21 of the electrode component 2. One end of the first clamping part 3221 is connected to the side of the second clamping part 3222 away from the active material coating part 21, and the other end of the first clamping part 3221 is spaced apart from the second clamping part 3222 to define a clamping groove 3201. The electrode post body 31 extends into the clamping groove 3201. The first clamping part 3221 can restrict the movement of the electrode post 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 post body 31 relative to the clamping structure 32 in the direction closer to the electrode component 2.

[0109] This configuration allows the insulating sealing structure 33 to be arranged around the outer periphery of the pole body 31. A portion of the insulating sealing structure 33 is sandwiched between the first clamping part 3221 and the pole body 31, and another portion is sandwiched between the second clamping part 3222 and the pole body 31, thereby achieving insulation and sealing between the clamping structure 32 and the pole body 31.

[0110] In some embodiments, the body portion 321, the first clamping portion 3221, and the second clamping portion 3222 are integrally formed. That is, the body portion 321 and the clamping member 322 of the clamping structure 32 are integrally formed.

[0111] The clamping structure 32 has a simple structure and can be constructed as an integral part of the main body 321, the first clamping part 3221 and the second clamping part 3222. This not only eliminates 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. This can improve the reliability of the insulation and sealing of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the required insulation and sealing requirements.

[0112] Please refer to Figures 7 and 8 again. The main body 321 and the first shell wall 13 are integrally formed. By integrally forming the clamping structure 32 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 overall strength and rigidity of the clamping structure 32 and the first shell wall 13, which is beneficial to improving the installation stability and reliability of the pole component 3 on the first shell wall 13.

[0113] Referring again to Figures 4 and 6, the main body 321 of the clamping structure 32 is welded to the first shell wall 13. That is to say, the main body 321 and the first shell wall 13 are set separately, so that the shape and material of the clamping structure 32 and the first shell wall 13 can be designed independently to meet the differentiated design requirements under different working conditions.

[0114] Specifically, the clamping structure 32, the pole body 31, and the insulating sealing structure 33 can be assembled first to form the pole component 3. Then, the assembled pole component 3 is installed onto the first shell wall 13, and the body portion 321 of the clamping structure 32 is welded to the first shell wall 13. For example, the body portion 321 and the first shell wall 13 can be connected by laser welding, autofusion welding, or brazing.

[0115] 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.

[0116] In some embodiments, the body portion 321, the first clamping portion 3221, and the second clamping portion 3222 are integrally formed. That is, the body portion 321 and the clamping member 322 of the clamping structure 32 are integrally formed.

[0117] The clamping structure 32 has a simple structure and can be constructed as an integral part of the main body 321, the first clamping part 3221 and the second clamping part 3222. This not only eliminates 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. This can improve the reliability of the insulation and sealing of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the required insulation and sealing requirements.

[0118] Please refer to Figure 9 again. In some embodiments, the thickness K3 of the body portion 321 is greater than the thickness h1 of the first shell wall 13.

[0119] Here, "thickness of the body portion 321" refers to the dimension of the body portion 321 in the thickness direction of the first shell wall 13. For example, the thickness of the first shell wall 13 can be reduced so that the thickness of the first shell wall 13 is less than the thickness of the body portion 321. For example, the thickness of the body portion 321 can be increased so that the thickness of the body portion 321 is greater than the thickness of the first shell wall 13.

[0120] The thickness of the first shell wall 13 is greater than or equal to 1 mm. For example, the thickness of the first shell wall 13 can be 1 mm, 1.5 mm, 2 mm, etc., so that the first shell wall 13 can meet the requirements of pressure resistance and safety.

[0121] In the above technical solution, by reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs; on the other hand, the materials used in the first shell wall 13 can be reduced, which helps to reduce material costs.

[0122] Furthermore, by increasing the thickness of the body portion 321, the structural strength of the body portion 321 can be improved. On the one hand, this can improve the connection reliability between the body portion 321 and the first shell wall 13, enhance the reliability of the electrode component 3 on the first shell wall 13, and make the battery cell 10 more reliable. On the other hand, it can improve the structural strength of the clamping structure 32, thereby improving the pressure resistance of the electrode component 3 and further enhancing the reliability of the battery cell 10.

[0123] For example, the body portion 321 of the clamping structure 32 is integrally formed with the first shell wall 13. By increasing the thickness of the body portion 321, the strength and rigidity of the overall structure of the body portion 321 and the first shell wall 13 can be increased, thereby improving the installation stability and reliability of the electrode body 31, as well as improving the pressure resistance of the electrode body 31 and the reliability of the battery cell 10.

[0124] For example, the main body 321 of the clamping structure 32 is separately disposed from the first shell wall 13, and the main body 321 is welded to the first shell wall 13. By increasing the thickness of the main body 321, the welding position between the main body 321 and the first shell wall 13 can be increased, the strength of the welding position can be improved, the first shell wall 13 is not easily deformed, and the reliability of the battery cell 10 can be improved.

[0125] Please refer to Figure 9 again. The thickness K2 of the second clamping part 3222 is less than the thickness K3 of the main body part 321.

[0126] Here, "thickness of the second clamping portion 3222" refers to the dimension of the second clamping portion 3222 in the thickness direction of the first shell wall 13. For example, the thickness of the second clamping portion 3222 can be reduced so that its thickness is less than the thickness of the main body portion 321. For example, the thickness of the main body portion 321 can be increased so that its thickness is greater than the thickness of the second clamping portion 3222.

[0127] In the above technical solution, by reducing the thickness of the second clamping part 3222, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which helps to reduce material costs.

[0128] Since the thickness of the body portion 321 is greater than the thickness of the first shell wall 13, i.e., the thickness of the first shell wall 13 is less than the thickness of the body portion 321, the structural strength of the first shell wall 13 may be less than that of the body portion 321, affecting the reliability of the first shell wall 13 in supporting the terminal post component 3. Based on this, by increasing the thickness of the body portion 321, the structural strength of the body portion 321 can be improved. On the one hand, the connection reliability between the body portion 321 and the first shell wall 13 can be improved, thereby enhancing the reliability of the terminal post component 3 on the first shell wall 13 and making the battery cell 10 more reliable. On the other hand, the structural strength of the clamping structure 32 can be improved, thereby enhancing the pressure resistance of the terminal post component 3 and further improving the reliability of the battery cell 10.

[0129] If the thickness of the second clamping portion 3222 is too small, it will reduce the structural strength of the second clamping portion 3222, affect the clamping ability of the clamping structure 32 to clamp the pole body 31, and affect the performance of the insulating sealing structure 33. Therefore, in some embodiments, the thickness K2 of the second clamping portion 3222 is greater than half the thickness K3 of the body portion 321.

[0130] In the above technical solution, by limiting the thickness of the second clamping part 3222 to be greater than half the thickness of the main body part 321, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the pole body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the pole body 31. On the other hand, it enables the second clamping part 3222 to press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33 and enabling the insulating sealing structure 33 to meet the requirements of insulation sealing.

[0131] Referring again to Figure 9, in some embodiments, the thickness K1 of the first clamping portion 3221 is less than the thickness K3 of the body portion 321. For example, the thickness of the first clamping portion 3221 can be reduced so that its thickness is less than the thickness of the body portion 321. For example, the thickness of the body portion 321 can be increased so that its thickness is greater than the thickness of the first clamping portion 3221.

[0132] In the above technical solution, by reducing the thickness of the first clamping part 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs. On the other hand, the material used in the clamping structure 32 can be reduced, which helps to reduce material costs. Furthermore, the first clamping part 3221 can be bent, thereby using the first clamping part 3221 and the second clamping part 3222 to fix the electrode body 31.

[0133] Furthermore, since the thickness of the body portion 321 is greater than the thickness of the first shell wall 13, i.e., the thickness of the first shell wall 13 is less than the thickness of the body portion 321, the structural strength of the first shell wall 13 may be less than that of the body portion 321, affecting the reliability of the first shell wall 13 in supporting the terminal post component 3. Based on this, by increasing the thickness of the body portion 321, the structural strength of the body portion 321 can be improved. On the one hand, the connection reliability between the body portion 321 and the first shell wall 13 can be improved, thereby enhancing the reliability of the terminal post component 3 on the first shell wall 13 and making the battery cell 10 more reliable. On the other hand, the structural strength of the clamping structure 32 can be improved, thereby enhancing the pressure resistance of the terminal post component 3 and further improving the reliability of the battery cell 10.

[0134] Referring again to Figure 9, in some embodiments, the thickness K1 of the first clamping portion 3221 is less than the thickness K2 of the second clamping portion 3222. For example, the thickness of the first clamping portion 3221 can be reduced so that its thickness is less than the thickness of the second clamping portion 3222. For example, the thickness of the second clamping portion 3222 can be increased so that its thickness is greater than the thickness of the first clamping portion 3221.

[0135] In the above technical solution, by reducing the thickness of the first clamping part 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs. On the other hand, the material used in the clamping structure 32 can be reduced, which helps to reduce material costs. Furthermore, the first clamping part 3221 can be bent, thereby using the first clamping part 3221 and the second clamping part 3222 to fix the electrode body 31.

[0136] Furthermore, by increasing the thickness of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the pole body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the pole body 31. On the other hand, it allows the second clamping part 3222 to press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33 and enabling the insulating sealing structure 33 to meet the requirements of insulation sealing.

[0137] Referring again to Figure 9, in some embodiments, the first clamping portion 3221 and the second clamping portion 3222 are stamped portions. That is, the first clamping portion 3221 and the second clamping portion 3222 are formed by a stamping process.

[0138] Stamping is a highly automated production process that can manufacture structures with relatively complex shapes and relatively high strength and rigidity, and can also achieve rapid and continuous production.

[0139] Specifically, the preparation process of the clamping structure 32 can be roughly as follows: the inner side of the annular material of the clamping structure 32 is stamped to form an annular structure with an approximately L-shaped cross section. Then, the inner side of the annular structure is impacted again to reduce the thickness of the inner side of the annular structure, forming an annular structure with an approximately T-shaped cross section. This forms the main body 321, the second clamping part 3222, and the first clamping part 3221 before bending. The thickness K1 of the first clamping part 3221 and the thickness K2 of the second clamping part 3222 formed by stamping are both less than the thickness K3 of the main body 321.

[0140] Therefore, in the above technical solution, by using a stamping process to process the first clamping part 3221 and the second clamping part 3222, the structural strength and rigidity of the clamping structure 32 can be improved, and the processing efficiency of the clamping structure 32 can be improved, thereby reducing production costs.

[0141] Please refer to Figure 10, which is a structural cross-sectional view of the electrode component 2 according to some other embodiments of this application. In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness K3 of the body portion 321.

[0142] For example, the thickness of the second clamping portion 3222 can be increased so that the thickness of the second clamping portion 3222 is less than the thickness K3 of the main body portion 321. For example, the thickness of the main body portion 321 can be decreased so that the thickness of the main body portion 321 is less than the thickness of the second clamping portion 3222.

[0143] In the above technical solution, by increasing the thickness of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the electrode body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the electrode body 31. On the other hand, it allows the second clamping part 3222 to press the insulating sealing structure 33 tightly, so that the insulating sealing structure 33 can meet the insulation sealing requirements. By reducing the thickness of the body part 321, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve the lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which is beneficial to reducing material costs.

[0144] Please refer to Figure 10 again. In some embodiments, the thickness K1 of the first clamping part 3221 is greater than the thickness K3 of the body part 321.

[0145] For example, the thickness of the first clamping portion 3221 can be increased so that the thickness of the first clamping portion 3221 is greater than the thickness of the main body portion 321. For example, the thickness of the main body portion 321 can be decreased so that the thickness of the main body portion 321 is less than the thickness of the first clamping portion 3221.

[0146] In the above technical solution, by increasing the thickness of the first clamping part 3221, the structural strength and rigidity of the first clamping part 3221 can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part 3221 and the second clamping part 3222 when used together, thereby improving the installation reliability of the electrode body 31. On the other hand, it allows the first clamping part 3221 to press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33 and enabling the insulating sealing structure 33 to meet the insulation sealing requirements. By reducing the thickness of the body part 321, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which is beneficial to reducing material costs.

[0147] Please refer to Figure 10 again. In some embodiments, the thickness K1 of the first clamping part 3221 is less than the thickness K2 of the second clamping part 3222.

[0148] For example, the thickness of the first clamping portion 3221 can be reduced so that the thickness of the first clamping portion 3221 is less than the thickness of the second clamping portion 3222. For example, the thickness of the second clamping portion 3222 can be increased so that the thickness of the second clamping portion 3222 is greater than the thickness of the first clamping portion 3221.

[0149] In the above technical solution, by reducing the thickness of the first clamping part 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs. On the other hand, the material used in the clamping structure 32 can be reduced, which helps to reduce material costs. Furthermore, the first clamping part 3221 can be bent, thereby using the first clamping part 3221 and the second clamping part 3222 to fix the electrode body 31.

[0150] Furthermore, by increasing the thickness of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the pole body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the pole body 31. On the other hand, it allows the second clamping part 3222 to press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33 and enabling the insulating sealing structure 33 to meet the requirements of insulation sealing.

[0151] Please refer to Figure 10 again. In some embodiments, the first clamping part 3221 and the body part 321 are stamped parts.

[0152] Stamping is a highly automated production process that can manufacture structures with relatively complex shapes and relatively high strength and rigidity, and can also achieve rapid and continuous production.

[0153] Specifically, the preparation process of the clamping structure 32 can be roughly as follows: the outer side of the annular material of the clamping structure 32 is stamped to form an annular structure with an approximately L-shaped cross section. Then, the outer side of the annular structure is impacted again to reduce the thickness of the outer side of the annular structure, forming an annular structure with an approximately T-shaped cross section. This forms the main body 321, the second clamping part 3222, and the first clamping part 3221 before bending. The thickness K3 of the main body 321 and the thickness K1 of the first clamping part 3221 formed by stamping are both less than the thickness K2 of the second clamping part 3222.

[0154] Therefore, in the above technical solution, by using a stamping process to process the first clamping part 3221 and the body part 321, the structural strength and rigidity of the clamping structure 32 can be improved, and the processing efficiency of the clamping structure 32 can be improved, thereby reducing production costs.

[0155] Please refer to Figure 10 again. In some embodiments, the thickness K2 of the second clamping part 3222 is greater than the thickness h1 of the first shell wall 13.

[0156] For example, the thickness of the second clamping portion 3222 can be increased so that the thickness of the second clamping portion 3222 is greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be decreased so that the thickness of the first shell wall 13 is less than the thickness of the second clamping portion 3222.

[0157] In the above technical solution, by increasing the thickness of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the electrode body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the electrode body 31. On the other hand, it allows the second clamping part 3222 to press the insulating sealing structure 33 tightly, so that the insulating sealing structure 33 can meet the insulation sealing requirements. By reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, making it easier to achieve lightweighting of the battery cell 10 and reducing transportation costs. On the other hand, it can reduce the amount of material used in the first shell wall 13, which is beneficial to reducing material costs.

[0158] Please refer to Figure 10 again. In some embodiments, the thickness K1 of the first clamping part 3221 is greater than the thickness h1 of the first shell wall 13.

[0159] For example, the thickness of the first clamping portion 3221 can be increased so that the thickness of the first clamping portion 3221 is greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be decreased so that the thickness of the first shell wall 13 is less than the thickness of the first clamping portion 3221.

[0160] In the above technical solution, by increasing the thickness of the first clamping part 3221, the structural strength and rigidity of the first clamping part 3221 can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part 3221 and the second clamping part 3222 when used together, thereby improving the installation reliability of the electrode body 31. On the other hand, it allows the first clamping part 3221 to press the insulating sealing structure 33 tightly, so that the insulating sealing structure 33 can meet the insulation sealing requirements. By reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs. On the other hand, it can reduce the material used in the first shell wall 13, which is beneficial to reducing material costs.

[0161] In some embodiments, the thickness of the structure with the smaller thickness between the body portion 321 and the clamping portion 3222 is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm. For example, the thickness of the structure with the smaller thickness between the body portion 321 and the clamping portion 3222 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0162] If the thickness of the body portion 321 is too small, it will affect the reliability of the connection between the body portion 321 and the first shell wall 13, resulting in a decrease in the reliability of the electrode component 3 on the first shell wall 13. If the thickness of the body portion 321 is too large, it will increase the weight of the electrode component 3, making it difficult to achieve the lightweighting of the battery cell 10, and will also increase the production cost of the electrode component 3.

[0163] If the thickness of the second clamping part 3222 is too small, it will affect the clamping ability of the second clamping part 3222 and the first clamping part 3221 on the pole body 31 when they are matched, and will also affect the pressing ability of the second clamping part 3222 on the insulating sealing structure 33, thereby affecting the insulating sealing effect of the insulating sealing structure 33.

[0164] Therefore, in the above technical solution, by limiting the thickness of the structure with the smaller thickness between the main body 321 and the second clamping part 3222 to meet the above conditions, the structural strength of the clamping structure 32 can be improved, thereby enhancing the reliability of the pole member 3.

[0165] Please refer to Figures 11-13. Figure 11 is a schematic diagram of the structure of the electrode component 2 on the first shell wall 13 in some other embodiments of this application; Figure 12 is a cross-sectional view of the structure along line D2-D2 in Figure 11; Figure 13 is a cross-sectional view of the structure along line E2-E2 in Figure 11. The thickness K3 of the body portion 321 is less than the thickness h1 of the first shell wall 13.

[0166] For example, the thickness of the body portion 321 can be reduced so that the thickness of the body portion 321 is less than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be increased so that the thickness of the first shell wall 13 is greater than the thickness of the body portion 321.

[0167] In the above technical solution, by reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which helps to reduce material costs.

[0168] Furthermore, by increasing the thickness of the first shell wall 13, the structural strength of the first shell wall 13 can be improved, thereby enhancing the first shell wall 13's resistance to external impact and reducing the risk of deformation of the first shell wall 13. On the one hand, this can improve the reliability of the first shell wall 13 in supporting the electrode component 3, and on the other hand, it can improve the strength of the connection between the first shell wall 13 and the body part 321, thereby improving the reliability of the electrode component 3 on the first shell wall 13 and making the battery cell 10 more reliable.

[0169] For example, the body portion 321 of the clamping structure 32 is integrally formed with the first shell wall 13. By increasing the thickness of the first shell wall 13, the strength and rigidity of the overall structure of the body portion 321 and the first shell wall 13 can be increased, thereby improving the installation stability and reliability of the electrode body 31, as well as improving the pressure resistance of the electrode body 31 and the reliability of the battery cell 10.

[0170] For example, the main body 321 of the clamping structure 32 is separately disposed from the first shell wall 13, and the main body 321 is welded to the first shell wall 13. By increasing the thickness of the first shell wall 13, the welding position between the main body 321 and the first shell wall 13 can be increased, the strength of the welding position can be improved, the first shell wall 13 is not easily deformed, and the reliability of the battery cell 10 can be improved.

[0171] Referring again to Figure 13, in some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness K3 of the main body portion 321. For example, the second clamping portion 3222 can be increased so that its thickness K2 is greater than the thickness K3 of the main body portion 321. For example, the thickness of the main body portion 321 can be decreased so that its thickness K3 is less than the thickness K2 of the second clamping portion 3222.

[0172] In the above technical solution, by reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which helps to reduce material costs.

[0173] Since the thickness K3 of the main body 321 is less than the thickness h1 of the first shell wall 13, it may affect the reliability of the pole piece 3. Based on this, by increasing the thickness K2 of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the pole piece 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the pole piece 31. On the other hand, it allows the second clamping part 3222 to press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the insulation sealing requirements.

[0174] If the thickness of the body portion 321 is too small, the connection reliability between the body portion 321 and the first shell wall 13 will be reduced, resulting in a decrease in the installation reliability of the pole member 3. Therefore, in some embodiments, the thickness K3 of the body portion 321 is greater than half the thickness K2 of the second clamping portion 3222.

[0175] In the above technical solution, by limiting the thickness of the main body 321 to be greater than half the thickness of the second clamping part 3222, the structural strength of the main body 321 can be improved, thereby improving the connection reliability between the clamping body 321 and the first shell wall 13, and further improving the installation reliability of the pole post component 3, and also improving the insulation and sealing strength of the insulation and sealing structure 33.

[0176] Please refer to Figure 14, which is a structural cross-sectional view of the electrode component 2 according to some other embodiments of this application. In some embodiments, the thickness K2 of the second clamping portion 3222 is less than the thickness K3 of the body portion 321.

[0177] For example, the thickness of the second clamping portion 3222 can be reduced so that the thickness of the second clamping portion 3222 is less than the thickness of the main body portion 321. For example, the thickness of the main body portion 321 can be increased so that the thickness of the main body portion 321 is greater than the thickness of the second clamping portion 3222.

[0178] In the above technical solution, by reducing the thickness of the second clamping part 3222, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the materials used in the clamping structure 32, which helps to reduce material costs; by increasing the thickness of the body part 321, the structural strength of the body part 321 can be improved, thereby improving the connection reliability between the clamping body part 321 and the first shell wall 13, thereby improving the installation reliability of the pole component 3, and also improving the insulation and sealing strength of the insulation and sealing structure 33.

[0179] In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness K3 of the body portion 321.

[0180] For example, the thickness of the first clamping portion 3221 can be increased so that the thickness of the first clamping portion 3221 is greater than the thickness of the main body portion 321. For example, the thickness of the main body portion 321 can be decreased so that the thickness of the main body portion 321 is less than the thickness of the first clamping portion 3221.

[0181] In the above technical solution, by increasing the thickness of the first clamping part 3221, the structural strength and rigidity of the first clamping part 3221 can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part 3221 and the second clamping part 3222 when used together, thereby improving the installation reliability of the pole body 31. On the other hand, it enables the first clamping part 3221 to press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33 and enabling the insulating sealing structure 33 to meet the requirements of insulation sealing.

[0182] Furthermore, by reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby making it easier to achieve lightweighting of the battery cell 10, reducing transportation costs, and also reducing the amount of material used in the clamping structure 32, which helps to reduce material costs.

[0183] In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness h1 of the first shell wall 13.

[0184] For example, the thickness of the second clamping portion 3222 can be increased so that the thickness of the second clamping portion 3222 is greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be decreased so that the thickness of the first shell wall 13 is less than the thickness of the second clamping portion 3222.

[0185] In the above technical solution, by increasing the thickness of the second clamping part 3222, the structural strength and rigidity of the second clamping part 3222 can be improved. On the one hand, this is beneficial to improving the clamping ability of the second clamping part 3222 on the pole body 31 when used in conjunction with the first clamping part 3221, thereby improving the installation reliability of the pole body 31. On the other hand, it enables the second clamping part 3222 to press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulation sealing.

[0186] In addition, by reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs; on the other hand, the amount of material used in the first shell wall 13 can be reduced, which helps to reduce material costs.

[0187] In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness h1 of the first shell wall 13.

[0188] For example, the thickness of the first clamping portion 3221 can be increased so that the thickness of the first clamping portion 3221 is greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be decreased so that the thickness of the first shell wall 13 is less than the thickness of the first clamping portion 3221.

[0189] In the above technical solution, by increasing the thickness of the first clamping part 3221, the structural strength and rigidity of the first clamping part 3221 can be improved. On the one hand, this is beneficial to improving the clamping ability of the first clamping part 3221 and the second clamping part 3222 when used together, thereby improving the installation reliability of the pole body 31. On the other hand, it enables the first clamping part 3221 to press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulation sealing.

[0190] In addition, by reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, making it easier to achieve lightweighting of the battery cell 10 and reduce transportation costs; on the other hand, the amount of material used in the first shell wall 13 can be reduced, which helps to reduce material costs.

[0191] In some embodiments, the thickness of the structure with the smaller thickness between the body portion 321 and the clamping portion 3222 is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm. For example, the thickness of the structure with the smaller thickness between the body portion 321 and the clamping portion 3222 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0192] If the thickness of the body portion 321 is too small, it will affect the reliability of the connection between the body portion 321 and the first shell wall 13, resulting in a decrease in the reliability of the electrode component 3 on the first shell wall 13. If the thickness of the body portion 321 is too large, it will increase the weight of the electrode component 3, making it difficult to achieve the lightweighting of the battery cell 10, and will also increase the production cost of the electrode component 3.

[0193] If the thickness of the second clamping part 3222 is too small, it will affect the clamping ability of the second clamping part 3222 and the first clamping part 3221 on the pole body 31 when they are matched, and will also affect the pressing ability of the second clamping part 3222 on the insulating sealing structure 33, thereby affecting the insulating sealing effect of the insulating sealing structure 33.

[0194] Therefore, in the above technical solution, by limiting the thickness of the structure with the smaller thickness between the main body 321 and the second clamping part 3222 to meet the above conditions, the structural strength of the clamping structure 32 can be improved, thereby enhancing the reliability of the pole member 3.

[0195] Referring again to Figures 9 and 10, Figures 13 and 14, in some embodiments, the pole member 3 further includes an outer insulating member 34, which at least partially covers the side of the first clamping portion 3221 opposite to the insulating sealing structure 33.

[0196] The terminal body 31 can be electrically connected to the busbar component. The outer insulation member 34 can separate the clamping structure 32 and the busbar component, so as to insulate the clamping structure 32 and the busbar component, and the first shell wall 13 and the busbar component, thereby reducing short circuit problems and improving the reliability of the battery cell 10.

[0197] 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.

[0198] In some embodiments, the outer insulating element 34 is connected to the insulating sealing structure 33.

[0199] Please refer to Figures 15-17. Figure 15 is a structural schematic diagram of the pole member 3 on the first shell wall 13 in some embodiments of this application; Figure 16 is an exploded view of the pole member 3 and the first shell wall 13 shown in Figure 15; Figure 17 is a partially enlarged view of the pole member 3 and the first shell wall 13 shown in Figure 16. A connecting portion 3202 is provided on the clamping structure 32, and the insulating sealing structure 33 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.

[0200] 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.

[0201] 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.

[0202] In the above technical solution, by connecting the outer insulating component 34 to the insulating sealing structure 33, the installation reliability of the outer insulating component 34 can be improved, thereby further improving the insulation reliability between the clamping structure 32 and the current collector, and between the first shell wall 13 and the current collector. Furthermore, by connecting the outer insulating component 34 to the insulating sealing structure 33, the insulation reliability between the clamping structure 32 and the electrode body 31 can be further improved, thereby improving the reliability of the battery cell 10 in use.

[0203] Please refer to Figure 17 again. In some embodiments, the connecting portion 3202 includes a notch 3202a, which is formed at the opening of the clamping groove 3201 and is located at the end of the first clamping portion 3221 away from the second clamping portion 3222.

[0204] The number of notches 3202a can be multiple, and the multiple notches 3202a are arranged at intervals around the pole body 31 in the circumferential direction of the first clamping part 3221.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] Please refer to Figure 18, which is a partial enlarged view of the pole post component 3 in some other 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 wall and outer wall of the clamping groove 3201.

[0210] The number of through holes 3202b can be multiple, and the multiple through holes 3202b are arranged at intervals around the pole post body 31 in the circumferential direction of the first clamping part 3221. The through holes 3202b can be round holes, square holes, etc.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] Please refer to Figure 18 again. Divide the first clamping part 3221 into two parts based on the bending position of the first clamping part 3221 (as described above as the arc extension 32213). The part closer to the second clamping part 3222 is the first part (as described above as the first extension 32211), and the part farther away from the second clamping part 3222 is the second part (as described above as the second extension 32212). The through hole 3202b is provided in the first part.

[0215] 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.

[0216] 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.

[0217] Please refer to Figure 17 again. In some embodiments, there are multiple connecting portions 3202, and the multiple connecting portions 3202 are arranged at intervals around the pole body 31 around the first clamping portion 3221.

[0218] 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.

[0219] 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.

[0220] In some embodiments, the surface of the outer insulating member 34 facing away from the first clamping portion 3221 is smoothly connected to the surface of the pole body 31 facing away from the electrode component 2. That is, the surface of the pole component 3 facing away from the electrode component 2 is relatively flat.

[0221] 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.

[0222] Referring again to Figure 18, 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 step 311.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] Referring again to Figure 18, step 311 is a ring structure, and the outer insulating member 34 is arranged around the first clamping part 3221. By setting 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.

[0227] Please refer to Figure 18 and further to Figure 19, which is a schematic diagram of the structure of the terminal post component according to some embodiments of this application. The terminal post body 31 protrudes at least partially from the side surface of the outer insulating member 34 opposite to the terminal post body 31. When the terminal post 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 post body 31 and the busbar component. It can also reduce the interference of the terminal post component 3 to other components outside the housing component 1 (such as the busbar component), which is beneficial to improving the reliability of the battery cell 10.

[0228] For example, referring to FIG19, the periphery of the end surface of the electrode body 31 facing away from the electrode component 2 has a step 311, and the outer insulating member 34 extends at least partially to one side of the step 311, for example, to the side of the step 311 near the flange portion 312, so as to be flush with the step surface of the step 311.

[0229] 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 surface of the step 311, 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 electrode 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 electrode component 3 to other components outside the housing component 1 (such as the current bus component) while satisfying the insulation effect, which is conducive to improving the reliability of the battery cell 10.

[0230] Furthermore, the step 311 is a ring structure, and the outer insulating member 34 is arranged around the first clamping part 3221, which can improve the insulation reliability of the outer insulating member 34, making the insulation reliability between the bus component and the clamping structure 32 higher, and reducing the risk of short circuit problems or other electrical safety accidents.

[0231] Referring again to Figure 18, in some embodiments, the first clamping portion 3221 includes a first extension 32211, a second extension 32212, and an arc-shaped extension 32213. The first extension 32211 is arranged around the periphery of the electrode body 31 and connected to the second clamping portion 3222. The second extension 32212 is located on the side of the electrode body 31 away from the electrode component 2 and is arranged at a distance from the second clamping portion 3222. The first extension 32211 and the second extension 32212 are connected by the arc-shaped extension 32213.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] In some embodiments, the side surface of the second insulating segment 342 facing away from the second extension segment 32212 is on the same plane as the end surface of the pole body 31 facing away from the electrode component 2. That is, the side surface of the second insulating segment 342 facing away from the second extension segment 32212 and the end surface 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.

[0238] When the terminal post 3 of the battery cell 10 is connected to the current collector, the external insulation 34 will not affect the connection reliability between the terminal post body 31 and the current collector while ensuring the insulation effect, which is beneficial to improving the reliability of the battery cell 10.

[0239] Therefore, this configuration allows the end face of the pole piece 3 facing away from the electrode piece 2 to be relatively flat, which can reduce the interference of the pole piece 3 with other components outside the housing piece 1 (such as the busbar component), and improve the reliability of the battery cell 10.

[0240] Please refer again to Figures 18 and 19. In some embodiments, the pole body 31 protrudes from the side surface of the second insulating section 342 opposite to the second extension section 32212.

[0241] When the terminal post 3 of the battery cell 10 is connected to the current collector, the external insulation 34 will not affect the connection reliability between the terminal post body 31 and the current collector while ensuring the insulation effect, which is beneficial to improving the reliability of the battery cell 10.

[0242] 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.

[0243] Please refer to Figures 18 and 19 again. In some embodiments, the periphery of the pole body 31 has a flange 312. In the thickness direction of the first shell wall 13, the flange 312 is located between the first clamping part 3221 and the second clamping part 3222. The first clamping part 3221 and the second clamping part 3222 clamp the flange 312 on both sides along the thickness direction through the insulating sealing structure 33.

[0244] 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; or, for another example, the flange portion 312 can be multiple discontinuous structures located on the outer periphery of the pole body 31.

[0245] 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.

[0246] 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.

[0247] Please refer to Figures 18 and 19 again. The insulating sealing structure 33 includes a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 is disposed between the first clamping part 3221 and the flange part 312, and the sealing ring 332 is disposed between the second clamping part 3222 and the flange part 312.

[0248] Depending on the matching requirements with the pole body 31 and the clamping structure 32, the first inner insulating part 3311 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 first inner insulating part 3311 can be set as a compressible insulating part with a sealing effect (e.g., an elastic rubber part), thereby meeting different practical requirements.

[0249] The sealing ring 332 can be made of a material that has both sealing and insulating properties, such as an elastic rubber component, so that the required sealing requirements can be met by designing the shape and position of the sealing ring 332.

[0250] In the above technical solution, by providing a first inner insulating member 3311 between the first clamping part 3221 and the flange part 312, insulation between the pole body 31 and the clamping structure 32 can be achieved. By providing a sealing ring 332 between the second clamping part 3222 and the flange part 312, sealing between the pole body 31 and the clamping structure 32 can be achieved, so that the pole component 3 itself has self-insulation and 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.

[0251] Furthermore, by clamping the first inner insulating member 3311 between the first clamping part 3221 and the flange part 312, and between the second clamping part 3222 and the flange part 312, it is beneficial to perform insulation sealing on the mating position of the clamping structure 32 and the pole body 31 through a shorter path, thereby improving the reliability of the insulation seal. It is also beneficial to reduce the size of the first inner insulating member 3311 and the sealing ring 332, making it easier to clamp them, so that the insulation and sealing performance are less likely to fail, thus improving the insulation and sealing effect.

[0252] 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.

[0253] Referring to Figure 18, the insulating sealing structure 33 includes a first inner insulating member 3311 and a sealing ring 332. A portion of the first inner insulating member 3311 is disposed between the first clamping portion 3221 and the flange portion 312, and another portion is disposed between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 is disposed between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0254] Referring to Figure 19, the insulating sealing structure 33 includes a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 is disposed between the first clamping part 3221 and the flange part 312. A portion of the sealing ring 332 is disposed between the second clamping part 3222 and the flange part 312. One end of the sealing ring 332 extends to the connection position of the first clamping part 3221 and the second clamping part 3222, and the other end extends to the end of the second clamping part 3222 away from the first clamping part 3221 and between it and the pole body 31.

[0255] Please refer to Figures 20 and 21. Figure 20 is a structural schematic diagram of the pole member 3 in some embodiments of this application; Figure 21 is a structural schematic diagram of the pole member 3 in other embodiments of this application. The insulating sealing structure 33 includes an integrally formed sealing ring 332, which is located both between the first clamping portion 3221 and the flange portion 312, and between the second clamping portion 3222 and the flange portion 312.

[0256] For example, the sealing ring 332 may be partially clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, and another portion may be clamped between the second clamping portion 3222 and the side of the flange portion 312 near the electrode component 2.

[0257] Specifically, as shown in FIG20, the sealing ring 332 may include a first sealing portion 3321 and a second sealing portion 3322 connected together. The first sealing portion 3321 is sandwiched between the second clamping portion 3222 and the flange portion 312 on the side near the electrode component 2, and the second sealing portion 3322 is sandwiched between the first clamping portion 3221 and the radially outer side of the flange portion 312.

[0258] For example, the sealing ring 332 may be partially clamped between the first clamping portion 3221 and the flange portion 312 on the side away from the electrode component 2, partially clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, and partially clamped between the second clamping portion 3222 and the flange portion 312 on the side close to the electrode component 2.

[0259] Specifically, as shown in Figure 21, the sealing ring 332 may include a first sealing portion 3321, a second sealing portion 3322, and a third sealing portion 3323 connected together. The second sealing portion 3322 is connected between the first sealing portion 3321 and the third sealing portion 3323. The first sealing portion 3321 is clamped between the second clamping portion 3222 and the side of the flange portion 312 near the electrode component 2. The second sealing portion 3322 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312. The third sealing portion 3323 is clamped between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2. In other words, under the action of the clamping member 322, the sealing ring 332 clamps the side of the flange portion 312 away from the electrode component 2 and the side of the flange portion 312 near the electrode component 2, thereby increasing the compression of the sealing ring 332 and improving reliability.

[0260] In the above technical solution, by simultaneously placing the integrally formed sealing ring 332 between the first clamping part 3221 and the flange part 312, and between the second clamping part 3222 and the flange part 312, multi-directional and multi-position sealing fit can be achieved, reducing sealing failure and improving the sealing effect of the sealing ring 332, thereby meeting the required sealing requirements.

[0261] Referring to Figures 20 and 21, the insulating sealing structure 33 includes a first inner insulating member 3311, a sealing ring 332, and a second inner insulating member 3312. The first inner insulating member 3311 is disposed between the first clamping part 3221 and the flange part 312. The sealing ring 332 is disposed between the connection position of the first clamping part 3221 and the second clamping part 3222 and the flange part 312. The second inner insulating member 3312 is disposed between the second clamping part 3222 and the flange part 312 at a position away from the first clamping part 3221.

[0262] The shape of the sealing ring 332 can be adapted to the connection position of the first clamping portion 3221 and the second clamping portion 3222. For example, the first clamping portion 3221 and the second clamping portion 3222 are set at an angle. The sealing ring 332 may include the connected first sealing portion 3321 and the second sealing portion 3322. Correspondingly, the first sealing portion 3321 and the second sealing portion 3322 are set at an angle. The first sealing portion 3321 is clamped between the second clamping portion 3222 and the side of the flange portion 312 near the electrode component 2. The second sealing portion 3322 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, so that the sealing ring 332 is at least partially located between the connection position of the first clamping portion 3221 and the second clamping portion 3222 and the flange portion 312.

[0263] Since one end of the second clamping part 3222 is connected to the first clamping part 3221, and the other end of the second clamping part 3222 (the end of the second clamping part 3222 away from the first clamping part 3221) is a free end, the second clamping part 3222 can be regarded as a cantilever structure. Therefore, when the pole body 31 is compressed or stretched, the second clamping part 3222 may deform relative to the first shell wall 13. The end of the second clamping part 3222 connected to the first clamping part 3221 (the fixed end of the second clamping part 3222) deforms the most, or even remains unchanged. The end of the second clamping part 3222 away from the first clamping part 3221 (the free end) deforms the most. If the sealing ring 332 is placed between the end of the second clamping part 3222 away from the first clamping part 3221 and the flange part 312, it may affect the sealing effect of the sealing ring 332.

[0264] Therefore, by placing the sealing ring 332 between the connection position of the first clamping part 3221 and the second clamping part 3222 and the flange part 312, that is, placing the sealing ring 332 between the second clamping part 3222 near its fixed end and the flange part 312, the influence of the deformation of the second clamping part 3222 on the sealing effect of the sealing ring 332 when the pole body 31 is under pressure or tension can be reduced, the sealing failure can be reduced, and the sealing ring 332 can meet the required sealing requirements.

[0265] The first inner insulating member 3311 is disposed between the first clamping part 3221 and the flange part 312, which can realize the insulation between the first clamping part 3221 and the pole body 31. The second inner insulating member 3312 is disposed between the second clamping part 3222 away from the first clamping part 3221 and the flange part 312, which can realize the insulation between the pole body 31 and the second clamping part 3222, further improving the self-insulation of the pole component 3 itself, facilitating the installation and cooperation between the pole component 3 and the first shell wall 13, and saving installation time and cost.

[0266] For example, after the pole body 31, clamping structure 32, sealing ring 332, and first inner insulation member 3311 are assembled, the assembly can be placed in a mold. Then, a melt for forming the second inner insulation member 3312 is injected into the mold. The melt can fill the space between the second clamping portion 3222 away from the first clamping portion 3221 and the flange portion 312. After the melt solidifies, the second inner insulation member 3312 is formed, and the second inner insulation member 3312 is connected to the sealing ring 332. For example, the second inner insulation member 3312 can also be a pre-formed structure, that is, the pole body 31, clamping structure 32, sealing ring 332, first inner insulation member 3311, and second inner insulation member 3312 can be directly assembled together.

[0267] Therefore, in the above technical solution, by employing the first inner insulating component 3311, the sealing ring 332, and the second inner insulating component 3312, and by rationally arranging the sealing ring 332, the first inner insulating component 3311, and the second inner insulating component 3312 between the electrode body 31 and the clamping structure 32, insulation and sealing failures can be reduced, and the insulation and sealing effect between the electrode body 31 and the clamping structure 32 can be better improved. This can reduce the risk of short circuits or other electrical safety accidents on the one hand, and reduce the probability of electrolyte seeping out from the inside of the casing component 1, moisture and dust entering the casing component 1 on the other hand, thereby improving the reliability of the battery cell 10.

[0268] Referring again to Figure 21, in some embodiments, the end face of the electrode body 31 facing the electrode component 2 is flush with the side surface of the first shell wall 13 facing the electrode component 2. Here, "flush with" means that the end face and the surface are at the same height, with no height difference between them, that is, the end face of the electrode body 31 facing the electrode component 2 and the side surface of the first shell wall 13 facing the electrode component 2 are on the same plane.

[0269] 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.

[0270] Referring again to Figure 20, in some other embodiments, the end face of the electrode body 31 facing the electrode component 2 is located on the side of the first shell wall 13 facing the electrode component 2 away from the electrode component 2.

[0271] 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.

[0272] 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.

[0273] Referring to Figure 21, the electrode body 31 also includes an insulating support 6, which is located on the side of the clamping structure 32 near the electrode component 2. The electrode body 31 includes an inner protrusion 313, which is located in the inner ring area of ​​the insulating support 6. The inner protrusion 313 protrudes towards the inner side of the first shell wall 13 relative to the clamping structure 32.

[0274] 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.

[0275] 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.

[0276] In the above technical solution, by setting the insulating support 6, insulation can be achieved between the active material coating part 21 of the electrode component 2 and the clamping structure 32, and insulation can also be achieved between the active material coating part 21 of the electrode component 2 and the first shell wall 13, which is beneficial to improving the reliability of the battery cell 10.

[0277] 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.

[0278] Please refer to 7. 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] Please refer again to Figures 4 and 6. The structure of the housing component 1 is not limited. For example, the housing component 1 includes a shell body 11 that helps to form the receiving cavity, one end of the shell body 11 having an opening 110, and the end of the shell body 11 opposite to the opening 110 being a first shell wall 13. As another example, referring to Figure 4, the housing component 1 includes a shell cover 12 that helps to form the receiving cavity, and the shell cover 12 is the first shell wall 13. Thus, the structural design of the housing component 1 is flexible, and the placement of the pole component 3 is flexible.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] Referring again to Figures 4 and 6, the battery cell 10 also includes an insulating film 5, which can wrap the active material coating portion 21. For example, the insulating film 5 can be plastic, rubber, etc.

[0288] By setting the insulating film 5, the insulation reliability between the active material coating part 21 and the housing part 1 can be improved, reducing or preventing the contact between the active material coating part 21 and the housing part 1, which could cause corrosion of the housing part 1, reducing electrolyte leakage caused by corrosion of the housing part 1, and improving the reliability of the battery cell 10.

[0289] 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] The insulating sealing structure 33 includes an inner insulating element 331 and a sealing ring 332. The inner insulating element 331 may include a first inner insulating element 3311, or may include a first inner insulating element 3311 and a second inner insulating element 3312.

[0294] For example, as shown in FIG18, the insulating sealing structure 33 may include a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 may be disposed between the clamping member 322 and the flange portion 312. One end of the first inner insulating member 3311 extends between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, and the other end extends between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 is clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0295] For example, as shown in FIG19, the insulating sealing structure 33 may include a first inner insulating member 3311 and a sealing ring 332. The first inner insulating member 3311 may be disposed between the clamping member 322 and the pole body 31, with one end of the first inner insulating member 3311 extending between the end of the first clamping part 3221 away from the second clamping part 3222 and the pole body 31, and the other end extending to the radially outer side of the flange part 312. The sealing ring 332 is disposed between the second clamping part 3222 and the flange part 312, with one end of the sealing ring 332 extending to the connection position of the first clamping part 3221 and the second clamping part 3222 or the radially outer side of the flange part 312, and the other end extending between the end of the second clamping part 3222 away from the first clamping part 3221 and the pole body 31.

[0296] For example, as shown in FIG20, the insulating sealing structure 33 may include a first inner insulating member 3311, a sealing ring 332, and a second inner insulating member 3312. A portion of the first inner insulating member 3311 is disposed between the first clamping portion 3221 and the flange portion 312 on the side away from the electrode component 2, and another portion is disposed between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the electrode body 31. A portion of the sealing ring 332 is clamped between the first clamping portion 3221 and the flange portion 312 on the radially outer side, and a portion is clamped between the second clamping portion 3222 and the flange portion 312 on the side facing the electrode component 2. The second inner insulating member 3312 is at least partially clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the electrode body 31.

[0297] For example, as shown in FIG21, the insulating sealing structure 33 may include a first inner insulating member 3311, a sealing ring 332, and a second inner insulating member 3312. The first inner insulating member 3311 is disposed between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the electrode body 31. A portion of the sealing ring 332 is clamped between the first clamping portion 3221 and the radially outer side of the flange portion 312, a portion is clamped between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2, and another portion is clamped between the second clamping portion 3222 and the side of the flange portion 312 facing the electrode component 2. The second inner insulating member 3312 is clamped between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the electrode body 31.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, wherein, include: The housing component includes a first housing wall; The electrode components are housed within the housing components; An electrode post component is disposed on the first shell wall and includes an electrode post body, a clamping structure, and an insulating sealing structure; the electrode post body is connected to the electrode component; the clamping structure surrounds the electrode post body and includes a body portion and a clamping member, the body portion is disposed around the outer periphery of the clamping member and is connected to the first shell wall, the clamping member is disposed on the body portion, and the clamping member includes a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion clamping the electrode post body through the insulating sealing structure; The thickness of the first clamping part is different from that of the main body, the thickness of the second clamping part is different from that of the main body, and the thickness of the one with the largest thickness among the first clamping part, the second clamping part, and the main body is greater than the thickness of the first shell wall.

2. The battery cell according to claim 1, wherein, The first clamping part is connected to the side of the second clamping part away from the electrode component, and the insulating sealing structure is clamped between the first clamping part and the electrode body, and between the second clamping part and the electrode body.

3. The battery cell according to claim 2, wherein, The main body, the first clamping part, and the second clamping part are integrally formed.

4. The battery cell according to claim 2, wherein, The main body and the first shell wall are integrally formed; or, the main body and the first shell wall are welded together.

5. The battery cell according to claim 4, wherein, The main body, the first clamping part, and the second clamping part are integrally formed.

6. The battery cell according to claim 2, wherein, The thickness of the body portion is greater than the thickness of the first shell wall.

7. The battery cell according to claim 6, wherein, The thickness of the second clamping part is less than the thickness of the main body part.

8. The battery cell according to claim 7, wherein, The thickness of the second clamping part is greater than half the thickness of the main body part.

9. The battery cell according to claim 6, wherein, The thickness of the first clamping part is less than the thickness of the body part, and / or the thickness of the first clamping part is less than the thickness of the second clamping part.

10. The battery cell according to any one of claims 7-9, wherein, The first clamping part and the second clamping part are stamped parts.

11. The battery cell according to claim 6, wherein, The thickness of the second clamping part is greater than the thickness of the main body part.

12. The battery cell according to claim 11, wherein, The thickness of the first clamping part is greater than the thickness of the body part, and / or the thickness of the first clamping part is less than the thickness of the second clamping part.

13. The battery cell according to claim 11 or 12, wherein, The first clamping part and the main body part are stamped parts.

14. The battery cell according to claim 6, wherein, The thickness of the second clamping part is greater than the thickness of the first shell wall.

15. The battery cell according to claim 6, wherein, The thickness of the first clamping part is greater than the thickness of the first shell wall.

16. The battery cell according to any one of claims 6-15, wherein, The thickness of the structure with the smaller thickness between the main body and the second clamping part is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm.

17. The battery cell according to claim 2, wherein, The thickness of the body portion is less than the thickness of the first shell wall.

18. The battery cell according to claim 17, wherein, The thickness of the second clamping part is greater than the thickness of the main body part.

19. The battery cell according to claim 18, wherein, The thickness of the main body is greater than half the thickness of the second clamping part.

20. The battery cell according to claim 17, wherein, The thickness of the second clamping part is less than the thickness of the main body part.

21. The battery cell according to claim 17, wherein, The thickness of the first clamping part is greater than the thickness of the main body part.

22. The battery cell according to claim 17, wherein, The thickness of the second clamping part is greater than the thickness of the first shell wall.

23. The battery cell according to claim 17, wherein, The thickness of the first clamping part is greater than the thickness of the first shell wall.

24. The battery cell according to any one of claims 17-23, wherein, The thickness of the structure with the smaller thickness between the main body and the second clamping part is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm.

25. The battery cell according to any one of claims 2-24, wherein, The pole post component also includes an outer insulating member, which at least partially covers the side of the first clamping portion away from the insulating sealing structure.

26. The battery cell according to claim 25, wherein, The outer insulating component's surface facing away from the first clamping part smoothly transitions to the end surface of the pole body facing away from the electrode component.

27. The battery cell according to claim 25, wherein, The periphery of the end of the electrode body facing away from the electrode component has a step; The outer insulation extends at least partially to the step, or the outer insulation extends at least partially to the side of the step near the flange, so as to be flush with the step surface.

28. The battery cell according to claim 27, wherein, The step is a ring structure, and the outer insulating component is arranged around the first clamping part.

29. The battery cell according to claim 25, wherein, The external insulating component is connected to the insulating sealing structure.

30. The battery cell according to claim 25, wherein, The first clamping portion includes a first extension section, a second extension section and an arc-shaped extension section. The first extension section is arranged around the periphery of the electrode body and connected to the second clamping portion. The second extension section is located on the side of the electrode body away from the electrode component and is arranged at a distance from the second clamping portion. The first extension section and the second extension section are connected by the arc-shaped extension section. The external insulation component includes a first insulation section, a second insulation section, and an arc-shaped insulation section. The first insulation section covers the side of the first extension section away from the pole body, and the second insulation section covers the side of the second extension section away from the pole body. The first insulation section and the second insulation section are connected by the arc-shaped insulation section.

31. The battery cell according to claim 30, wherein, The surface of the second insulating section facing away from the second extension section is in the same plane as the surface of the pole body facing away from the electrode component; or, the pole body partially protrudes from the surface of the second insulating section facing away from the second extension section.

32. The battery cell according to any one of claims 2-31, wherein, The periphery of the pole body has a flange portion. 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 clamping portion and the second clamping portion clamp the flange portion on both sides along the thickness direction through the insulating sealing structure.

33. The battery cell according to claim 32, wherein, The insulating and sealing structure includes a first inner insulating member and a sealing ring. The first inner insulating member is disposed between the first clamping portion and the flange portion, and the sealing ring is disposed between the second clamping portion and the flange portion. Alternatively, the insulating sealing structure includes an integrally formed sealing ring, which is located both between the first clamping portion and the flange portion, and between the second clamping portion and the flange portion. Alternatively, the insulating sealing structure includes a first inner insulating member, a sealing ring, and a second inner insulating member. The first inner insulating member is disposed between the first clamping portion and the flange portion. The sealing ring is disposed between the connection position of the first clamping portion and the second clamping portion and the flange portion. The second inner insulating member is disposed between the second clamping portion and the flange portion at a position away from the first clamping portion.

34. The battery cell according to any one of claims 1-33, wherein, The clamping structure is formed as an elongated strip extending along the length of the first shell wall; 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.

35. The battery cell according to any one of claims 1-33, 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.

36. The battery cell according to any one of claims 1-35, 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.

37. The battery cell according to any one of claims 1-36, 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.

38. A battery device, wherein, Includes the battery cell according to any one of claims 1-37.

39. An electrical appliance, wherein, Includes the battery device according to claim 38.

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