Battery cell, battery device, and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery monomer, a battery device and a power utilization device. The single battery comprises a shell part, an electrode part and a pole part, the shell part comprises a first shell wall, and the pole part comprises a pole body, a clamping structure and an insulation sealing structure; the clamping structure comprises a body part and a clamping piece, the clamping piece comprises a first clamping part and a second clamping part, and the first clamping part and the second clamping part clamp the pole body through the insulation sealing structure; the thickness of the first clamping part is different from that of the body part, the thickness of the second clamping part is different from that of the body part, and the thickness of the largest one of the first clamping part, the second clamping part and the body part is larger than that of the first shell wall. In the technical scheme of the embodiment of the invention, 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 the reliability of the pole part are improved, and the improvement of the reliability of the battery monomer is facilitated.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The sealing performance between the pole and the housing of the battery cell of the related art is poor, resulting in reduced reliability of the battery cell. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell, a battery device and an electrical device, which can improve the reliability of use.

[0005] In the first aspect, the present application provides a battery cell, comprising: a shell component, the shell component comprising a first shell wall; an electrode component, the electrode component is accommodated in the shell component; a pole component, the pole is not arranged on the first shell wall, and comprises a pole body, a clamping structure, and an insulating sealing structure; the pole body is connected to the electrode component; the clamping structure surrounds the pole body, and comprises a body part and a clamping member, the body part is arranged around the outer periphery of the clamping member and is connected to the first shell wall, the clamping member is arranged on the body part, the clamping member comprises a first clamping part and a second clamping part, the first clamping part and the second clamping part clamp the pole body through the insulating sealing structure; wherein the first clamping part and the body part have different thicknesses, the second clamping part and the body part have different thicknesses, and the thickness of the thickest one among the first clamping part, the second clamping part and the body part is greater than the thickness of the first shell wall.

[0006] In the technical solution of the embodiment of the present application, by setting a clamping structure and using it in conjunction with an insulating sealing structure, the pole body can be fixedly installed on the clamping structure, and insulation and sealing between the clamping structure and the pole 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 pole body and the insulating 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 pole 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 and moisture and dust entering the shell component can be reduced, which is beneficial to improving the reliability of the battery cell.

[0007] In some embodiments, the first clamping portion is connected to the side of the second clamping portion facing away from the electrode component, and the insulating sealing structure is sandwiched between the first clamping portion and the pole body, and between the second clamping portion and the pole body. In the above technical solution, the insulating sealing structure can be arranged around the outer circumference of the pole body, and a part of the insulating sealing structure is sandwiched between the first clamping portion and the pole body, and the other part is sandwiched between the second clamping portion and the pole body, so as to achieve insulation and sealing between the clamping structure and the pole body.

[0008] In some embodiments, the main body, the first clamping part and the second clamping part are integrally formed. In the above technical solution, the structure of the clamping structure is simple, and the main body, the first clamping part and the second clamping part that are integrally formed can be constructed, which can not only save the connection steps of the three, which is conducive to improving production efficiency, but also improve the structural strength of the clamping structure, thereby improving the insulation and sealing reliability of the insulating sealing structure, so that the insulating sealing structure can meet the required insulation and sealing requirements.

[0009] In some embodiments, the body and the first shell wall are integrally formed; or, the body and the first shell wall are connected by welding. In the above technical solution, by integrally forming the body and the first shell wall, the connection step between the two can be omitted, which is conducive to improving production efficiency, and can also improve the structural strength of the clamping structure and the first shell wall, which is conducive to improving the reliability of the first shell wall and the clamping structure, and improving the installation stability and reliability of the pole component on the first shell wall; by welding the body and 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 conducive to improving production efficiency.

[0010] In some embodiments, the main body, the first clamping part and the second clamping part are integrally formed. In the above technical solution, the structure of the clamping structure is simple, and the main body, the first clamping part and the second clamping part that are integrally formed can be constructed, which can not only save the connection steps of the three, which is conducive to improving production efficiency, but also improve the structural strength of the clamping structure, thereby improving the insulation and sealing reliability of the insulating sealing structure, so that the insulating sealing structure can meet the required insulation and sealing requirements.

[0011] In some embodiments, the thickness of the main body 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, which is easy to achieve lightweight battery cells and reduce transportation costs. On the other hand, the material used for the first shell wall can be reduced, which is conducive to reducing material costs. By increasing the thickness of the main body, the structural strength of the main body can be improved. On the one hand, the connection reliability between the main body and the first shell wall can be improved, and the reliability of the pole component on the first shell wall can be improved, so that the reliability of the battery cell is higher. On the other hand, the structural strength of the clamping structure can be improved, so that the pressure resistance of the pole component can be improved, and the reliability of the battery cell can be further improved.

[0012] In some embodiments, the thickness of the second clamping portion is less than the thickness of the main body. 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 reducing the materials used in the clamping structure, which is conducive to reducing material costs; by increasing the thickness of the main body, the structural strength of the main body can be improved. On the one hand, the connection reliability between the main body and the first shell wall can be improved, and the reliability of the pole component on the first shell wall can be improved, so that the reliability of the battery cell is higher. On the other hand, the structural strength of the clamping structure can be improved, so that the pressure resistance of the pole component can be improved, and the reliability of the battery cell can be further improved.

[0013] In some embodiments, the thickness of the second clamping portion is greater than half of the thickness of the main body. In the above technical solution, by limiting the thickness of the second clamping portion to be greater than half of the thickness of the main body, the structural strength and rigidity of the second clamping portion can be improved, which is beneficial to improving the clamping ability of the second clamping portion to the pole body when used in conjunction with the first clamping portion, and improving the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure, improve the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing.

[0014] In some embodiments, the thickness of the first clamping portion is less than the thickness of the main 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, so that it is easy to achieve lightweight battery cells, reduce transportation costs, and reduce the materials used in the clamping structure, which is conducive to reducing 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, the connection reliability between the main body portion and the first shell wall can be improved, and the reliability of the pole component on the first shell wall can be improved, so that the reliability of the battery cell is higher. On the other hand, the structural strength of the clamping structure can be improved, so that the pressure resistance of the pole component can be improved, and the reliability of the battery cell can be further improved; 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, it is conducive to improving the clamping ability of the second clamping portion on the pole body when used in conjunction with the first clamping portion, and improving the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure, improve the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing.

[0015] In some embodiments, the first clamping part and the second clamping part are stamping parts. In the above technical solution, the first clamping part and the second clamping part are processed by stamping process, which can improve the structural strength and rigidity of the clamping structure on the one hand, and improve the processing efficiency of the clamping structure and reduce production costs on the other hand.

[0016] In some embodiments, the thickness of the second clamping portion is greater than the thickness of the main body. 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, which 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, and improving the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing.

[0017] In some embodiments, the thickness of the first clamping portion is greater than the thickness of the main body. In the above technical solution, by increasing the thickness of the first clamping portion, the structural strength and rigidity of the first clamping portion can be improved, which is beneficial to improving the clamping ability of the first clamping portion and the second clamping portion when used in conjunction with the pole body, and improving the installation reliability of the pole body. On the other hand, the first clamping portion can compress the insulating sealing structure and improve the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing; by reducing the thickness of the main body, the weight of the clamping structure can be reduced, so that it is easy to achieve lightweight battery cells and reduce transportation costs. It can also reduce the materials used in the clamping structure, which is conducive to reducing material costs.

[0018] In some embodiments, 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, so that it is easy to achieve lightweight battery cells, reduce transportation costs, and reduce the materials used in the clamping structure, which is conducive to reducing material costs; by increasing the thickness of the second clamping portion, the structural strength and rigidity of the second clamping portion can be improved, which is conducive to improving the clamping ability of the second clamping portion on the pole body when used in conjunction with the first clamping portion, and improving the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure and improve the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing.

[0019] In some embodiments, the first clamping part and the main body are stamping parts. In the above technical solution, the first clamping part and the main body are processed by stamping process, which can improve the structural strength and rigidity of the clamping structure on the one hand, and improve the processing efficiency of the clamping structure and reduce production costs on the other hand.

[0020] 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, it is beneficial to improve the clamping ability of the second clamping portion on the pole body when used in conjunction with the first clamping portion, and improve the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure so that the insulating sealing structure can meet the requirements of insulating sealing; by reducing the thickness of the first shell wall, on the one hand, the weight of the shell component can be reduced, which is easy to achieve lightweight battery cells and reduce transportation costs. On the other hand, the material used for the first shell wall can be reduced, which is conducive to reducing material costs.

[0021] In some embodiments, the thickness of the first clamping portion is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the first clamping portion, the structural strength and rigidity of the first clamping portion can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion and the second clamping portion when used in conjunction with the pole body, and improve the installation reliability of the pole body. On the other hand, the first clamping portion can compress the insulating sealing structure so that the insulating sealing structure can meet the requirements of insulating sealing. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell component can be reduced, which is easy to achieve lightweight battery cells and reduce transportation costs. On the other hand, the material used for the first shell wall can be reduced, which is conducive to reducing material costs.

[0022] In some embodiments, 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 equal to 5 mm. In the above technical solution, by limiting the thickness of the structure with the smaller thickness between the main body and the second clamping part to meet the above conditions, the structural strength of the clamping structure can be improved, thereby improving the reliability of the pole component.

[0023] In some embodiments, the thickness of the main body is less than the thickness of the first shell wall. In the above technical solution, by reducing the thickness of the main body, the weight of the clamping structure can be reduced, so that it is easy to achieve lightweight battery cells, reduce transportation costs, and reduce the materials used in the clamping structure, which is conducive to reducing material costs; by increasing the thickness of the first shell wall, the structural strength of the first shell wall can be improved, so that the first shell wall's ability to resist external impact can be enhanced, and the risk of deformation of the first shell wall can be reduced. On the one hand, the support reliability of the first shell wall to the pole component can be improved, and on the other hand, the strength of the connection position between the first shell wall and the main body can be improved, and the reliability of the pole component on the first shell wall can be improved, so that the reliability of the battery cell is higher.

[0024] In some embodiments, the thickness of the second clamping portion is greater than the thickness of the main body. 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, which 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, and improving the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing.

[0025] In some embodiments, the thickness of the body portion is greater than half of 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 of 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, thereby improving the installation reliability of the pole component, and also improving the insulation sealing strength of the insulation sealing structure.

[0026] In some embodiments, the thickness of the second clamping portion is less than the thickness of the main body. 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 and reducing the transportation cost, and also reducing the materials used in the clamping structure, which is conducive to reducing the material cost; by increasing the thickness of the main body, the structural strength of the main body can be improved, thereby improving the connection reliability between the clamping body and the first shell wall, thereby improving the installation reliability of the pole component, and also improving the insulation sealing strength of the insulation sealing structure.

[0027] In some embodiments, the thickness of the first clamping portion is greater than the thickness of the main body. In the above technical solution, by increasing the thickness of the first clamping portion, the structural strength and rigidity of the first clamping portion can be improved, which is beneficial to improving the clamping ability of the first clamping portion and the second clamping portion when used in conjunction with the pole body, and improving the installation reliability of the pole body. On the other hand, the first clamping portion can compress the insulating sealing structure and improve the performance of the insulating sealing structure, so that the insulating sealing structure can meet the requirements of insulating sealing; by reducing the thickness of the main body, the weight of the clamping structure can be reduced, so that it is easy to achieve lightweight battery cells and reduce transportation costs. It can also reduce the materials used in the clamping structure, which is conducive to reducing material costs.

[0028] 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, it is beneficial to improve the clamping ability of the second clamping portion on the pole body when used in conjunction with the first clamping portion, and improve the installation reliability of the pole body. On the other hand, the second clamping portion can compress the insulating sealing structure so that the insulating sealing structure can meet the requirements of insulating sealing; by reducing the thickness of the first shell wall, on the one hand, the weight of the shell component can be reduced, which is easy to achieve lightweight battery cells and reduce transportation costs. On the other hand, the material used for the first shell wall can be reduced, which is conducive to reducing material costs.

[0029] In some embodiments, the thickness of the first clamping portion is greater than the thickness of the first shell wall. In the above technical solution, by increasing the thickness of the first clamping portion, the structural strength and rigidity of the first clamping portion can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion and the second clamping portion when used in conjunction with the pole body, and improve the installation reliability of the pole body. On the other hand, the first clamping portion can compress the insulating sealing structure so that the insulating sealing structure can meet the requirements of insulating sealing. By reducing the thickness of the first shell wall, on the one hand, the weight of the shell component can be reduced, which is easy to achieve lightweight battery cells and reduce transportation costs. On the other hand, the material used for the first shell wall can be reduced, which is conducive to reducing material costs.

[0030] In some embodiments, 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 equal to 5 mm. In the above technical solution, by limiting the thickness of the structure with the smaller thickness between the main body and the second clamping part to meet the above conditions, the structural strength of the clamping structure can be improved, thereby improving the reliability of the pole component.

[0031] In some embodiments, the pole component further includes an external insulating member, which at least partially covers a side of the first clamping portion away from the insulating sealing structure. In the above technical solution, the provision of the external insulating member can separate the clamping structure and the current collecting component, so that the clamping structure and the current collecting component, and the first shell wall and the current collecting component are insulated, thereby reducing the short circuit problem and improving the reliability of the battery cell.

[0032] In some embodiments, a side surface of the outer insulating member facing away from the first clamping portion is smoothly transitionally connected to an end surface of the pole body facing away from the electrode component. This arrangement can simplify the external structure of the battery cell and make the battery cell beautiful in appearance, and can reduce the stop effect of the outer insulating member on the current collecting component and improve the connection reliability between the pole body and the current collecting component.

[0033] In some embodiments, the peripheral edge of the surface of one end of the pole body away from the electrode component has a step; the outer insulating member at least partially extends to the step, or the outer insulating member at least partially extends to one side of the step to be flush with the step surface of the step. In the above technical solution, by providing a step on the pole body, the contact area between the outer insulating member and the pole body can be increased, thereby increasing the connection reliability between the outer insulating member and the pole body, making the insulation reliability between the current collecting component and the clamping structure higher, and the outer insulating member is connected to the insulating sealing structure, which can completely separate the pole body and the clamping structure, so that the insulation reliability between the pole body and the clamping structure is higher.

[0034] In some embodiments, the step is an annular structure, and the outer insulating member is arranged around 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 pole body can be further increased, thereby increasing the connection reliability between the outer insulating member and the pole body, and making the insulation reliability between the current collecting component and the clamping structure higher.

[0035] In some embodiments, the outer insulating member is connected to the insulating sealing structure. In the above technical solution, by connecting the outer insulating member to the insulating sealing structure, the installation reliability of the outer insulating member can be improved, thereby further improving the insulation reliability between the clamping structure and the current collecting component, and between the first shell wall and the current collecting component, and the outer insulating member is connected to the insulating sealing structure, which can further improve the insulation reliability between the clamping structure and the pole body, thereby improving the reliability of the battery cell.

[0036] In some embodiments, the first clamping portion includes a first extension section, a second extension section and a circular arc extension section, the first extension section is arranged around the circumference of the pole body and connected to the second clamping portion, the second extension section is located on the side of the pole body away from the electrode component and is arranged with a relative spacing from the second clamping portion, and the first extension section and the second extension section are connected through the circular arc extension section; the outer insulating member includes a first insulating section, a second insulating section and a circular arc insulation section, the first insulating section covers the side of the first extension section away from the pole body, the second insulating section covers the side of the second extension section away from the pole body, and the first insulating section and the second insulating section are connected through the circular arc insulation section. In the above technical solution, by setting the first clamping portion to include the first extension section, the second extension section and the circular arc extension section, and setting the outer insulating member to include the first insulating section, the second insulating section and the circular arc insulation section, the damage of the pole body to the outer insulating member is reduced, thereby improving the insulation reliability of the outer insulating member.

[0037] In some embodiments, the side surface of the second insulating section facing away from the second extension section is in the same plane as the end surface of the pole body facing away from the electrode component; or the pole body partially protrudes from the side surface of the second insulating section facing away from the second extension section. In the above technical solution, by setting the side surface of the second insulating section facing away from the second extension section to be no higher than the end surface of the pole body facing away from the electrode component, the interference of the pole component with other components outside the shell component (such as the current collecting component, etc.) can be reduced, thereby improving the reliability of the battery cell.

[0038] In some embodiments, the circumferential side of the pole body has a flange portion, and in the thickness direction of the first shell wall, the flange portion is located between the first clamping portion and the second clamping portion, and the first clamping portion and the second clamping portion clamp the flange portion on both sides of the thickness direction through the insulating sealing structure. In the above technical solution, by providing the flange portion on the circumferential side of the pole body, the first clamping portion and the second clamping portion are respectively located on both sides of the flange portion in the thickness direction of the first shell wall to limit the pole body from moving in a direction away from or close to the electrode component relative to the clamping structure, and the structure of the flange portion is simple and easy to process.

[0039] In some embodiments, the insulating sealing structure includes a first inner insulating member and a sealing ring, wherein 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 disposing the first inner insulating member between the first clamping portion and the flange portion, insulation between the pole body and the clamping structure can be achieved, and by disposing the sealing ring between the second clamping portion and the flange portion, sealing between the pole body and the clamping structure can be achieved, so that the pole component itself has self-insulation and sealing properties, which facilitates the installation and cooperation of the pole component and the first shell wall, and can save installation time and cost.

[0040] In some embodiments, the insulating sealing structure includes an integrally arranged sealing ring, which is 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 arranging the integrally arranged 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 cooperation can be achieved, reducing sealing failure, which is conducive to improving the sealing effect of the sealing ring, thereby meeting the required sealing requirements.

[0041] In some embodiments, the insulating sealing structure includes a first inner insulating member, a sealing ring and a second inner insulating member, wherein 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 between the first clamping portion and the second clamping portion and the flange portion, and the second inner insulating member is disposed between the position of the second clamping portion away from the first clamping portion and the flange portion. In the above technical solution, by adopting the first inner insulating member, the sealing ring and the second inner insulating member, and by reasonably arranging the sealing ring, the first inner insulating member and the second inner insulating member between the pole body and the clamping structure, it is possible to reduce insulation and sealing failures, and better improve the insulating sealing effect between the pole body and the clamping structure, thereby reducing the risk of short circuit problems or other electrical safety accidents on the one hand, and reducing the probability of electrolyte seepage from the inside of the shell component, moisture and dust entering the shell component on the other hand, thereby improving the reliability of the battery cell.

[0042] In some embodiments, the clamping structure is formed into a long strip extending along the length direction of the first shell wall; the contour shape of the pole body matches the contour shape of the clamping structure, or the pole body is arranged in the center of the clamping structure and has a circular contour. In this way, the area of ​​the pole body is larger, which is conducive to increasing the connection area between the conductive part and the pole body, thereby improving the charging performance.

[0043] In some embodiments, the clamping structure is formed into a circular ring shape, and the contour shape of the pole body matches the contour shape of the clamping structure. In this way, the connection position of the clamping structure and the pole body is evenly stressed, and the compression amount of the insulating sealing structure is easily controlled to improve the reliability of the sealing cooperation between the two. In addition, the sealing area is relatively small and is not easy to fail.

[0044] In some embodiments, the shell component includes a shell body having an opening at at least one end and a shell cover disposed at the opening; wherein the wall of the shell body opposite to the opening is a first shell wall; or, the shell cover is the first shell wall. In the above technical solution, the structural design of the shell component is flexible, and the setting position of the pole component is flexible.

[0045] In some embodiments, the battery cell further includes a pressure relief device, which is disposed on the housing component and is located on the same side or on the opposite side as the pole component. In the above technical solution, by providing the pressure relief device, when the pressure in the housing component exceeds a preset value, the pressure can be released in a directional manner through the pressure relief device, thereby improving the safety and reliability of the battery cell.

[0046] In a second aspect, the present application provides a battery device, comprising the battery cell of the above embodiment. In the technical solution of the embodiment of the present application, by adopting the battery cell of the above embodiment, the performance of the battery device is improved.

[0047] In a third aspect, the present application provides an electric device, including the battery device of the above embodiment. In the technical solution of the embodiment of the present application, by adopting the battery device of the above embodiment, it is beneficial to improve the working performance of the electric device.

[0048] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0050] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0051] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0052] Figure 3 A schematic diagram of the structure of a battery cell in some embodiments of the present application;

[0053] Figure 4 for Figure 3 The structural explosion diagram of the battery cell shown in;

[0054] Figure 5 A top view of a battery cell according to some embodiments of the present application;

[0055] Figure 6 For along Figure 5 Sectional view along line AA;

[0056] Figure 7This is a schematic diagram of the structure of the electrode component on the first shell wall in some embodiments of the present application;

[0057] Figure 8 For along Figure 7 Structural cross-section view of the B2-B2 line;

[0058] Fig. 9 For along Figure 7 Structural cross-section view of the C2-C2 line;

[0059] Fig.10 The structure cross-sectional views of electrode components of other embodiments of the present application;

[0060] Fig.11 It is a schematic diagram of the structure of the electrode components on the first shell wall in some other embodiments of the present application;

[0061] Fig.12 For along Fig.11 Structural cross-sectional view of the D2-D2 line;

[0062] Fig.13 For along Fig.11 Structural cross-sectional view of line E2-E2;

[0063] Fig.14 The structure cross-sectional views of electrode components of other embodiments of the present application;

[0064] Fig.15 This is a schematic structural diagram of a pole component on a first shell wall according to some further embodiments of the present application;

[0065] Fig.16 for Fig.15 An exploded view of the structure of the pole component and the first shell wall shown in FIG.

[0066] Fig.17 for Fig.16 A partial enlarged view of the pole component and the first shell wall shown in FIG.

[0067] Fig.18 It is a partial enlarged view of the pole component of some other embodiments of the present application;

[0068] Fig.19 Schematic diagram of the structure of the pole components of some other embodiments of the present application;

[0069] Fig. 20 This is a schematic diagram of the structure of the pole component of some other embodiments of the present application;

[0070] Fig.21 Schematic diagram of the structure of pole components of other embodiments of the present application.

[0071] The reference numerals in the specific implementation manner are as follows:

[0072] Vehicle 1000,

[0073] Battery device 100, box assembly 101, box cover 1011, box 1012, controller 200, motor 300,

[0074] Battery cell 10,

[0075] Shell component 1, shell body 11, opening 110, shell cover 12, first shell wall 13, mounting hole 131, second shell wall 14,

[0076] Electrode member 2, active material coating portion 21, conductive portion 22,

[0077] Pole component 3, receiving groove 301,

[0078] The pole body 31, the step 311, the flange 312, the pole inner protrusion 313,

[0079] The clamping structure 32 includes a clamping groove 3201, a connecting portion 3202, a notch 3202a, a through hole 3202b, a main body 321, a clamping member 322, a first clamping portion 3221, a first extension section 32211, a second extension section 32212, an arc extension section 32213, a second clamping portion 3222,

[0080] Insulation sealing structure 33, inner insulating member 331, first inner insulating member 3311, second inner insulating member 3312, sealing ring 332, first sealing part 3321, second sealing part 3322, third sealing part 3323,

[0081] The outer insulating member 34, the first insulating section 341, the second insulating section 342, the arc insulating section 343,

[0082] Pressure relief device 4, insulating film 5, insulating bracket 6. DETAILED DESCRIPTION

[0083] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0085] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0086] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0087] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0088] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0089] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0090] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0091] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0092] The sealing between the pole and the shell of the battery cell in the related art is poor, which is not only prone to short circuit or other electrical safety accident risks, but also causes electrolyte to leak from the shell components, and moisture and dust to enter the shell components, ultimately resulting in poor reliability of the battery cell.

[0093] To this end, an embodiment of the present application proposes a battery cell, which utilizes the first clamping part and the second clamping part of the clamping structure to clamp the pole 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 main body, the insulation performance and reliability of the pole component can be further improved, the risk of short circuit problems or other electrical safety accidents can be reduced, and the probability of electrolyte leakage from the inside of the shell component and moisture and dust entering the shell component can be reduced.

[0094] The battery cell disclosed in the embodiments of the present application can be used in an electrical device that uses a battery device as a power source or in various energy storage systems that use a battery device as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0095] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0096] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0097] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0098] Please refer to Figure 2 , Figure 2 The structure of the battery device 100 provided in some embodiments of the present application is an exploded view. The battery device 100 includes a box assembly 101 and a battery cell assembly, and the battery cell assembly is accommodated in the box assembly 101.

[0099] The box assembly 101 is used to provide a storage space for the battery cell 10, and the box assembly 101 can adopt a variety of structures. In some embodiments, the box assembly 101 can include a box 1012 and a box cover 1011, the box 1012 and the box cover 1011 cover each other, and the box 1012 and the box cover 1011 together define a storage space for accommodating the battery cell 10. The box 1012 can be a hollow structure with one end open, and the box cover 1011 can be a plate-like structure, and the box cover 1011 covers the open side of the box 1012, so that the box 1012 and the box cover 1011 together define a storage space; the box 1012 and the box cover 1011 can also be hollow structures with one side open, and the open side of the box cover 1011 covers the open side of the box 1012. Of course, the box assembly 101 formed by the box 1012 and the box cover 1011 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0100] The battery cell assembly may include a plurality of battery cells 10, and the plurality of battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the plurality of battery cells 10 are both connected in series and in parallel. The plurality of battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells 10 is accommodated in the box assembly 101; of course, the battery device 100 may also be a plurality of battery cells 10 connected in series, in parallel, or in a mixed connection to form a battery device 100 module, and then the plurality of battery device 100 modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the box assembly 101. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the plurality of battery cells 10.

[0101] Each battery cell 10 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 may be cylindrical, flat, rectangular, or in other shapes.

[0102] Please refer to Figure 3-Figure 6 , Figure 3 A schematic diagram of the structure of a battery cell 10 according to some embodiments of the present application; Figure 4 for Figure 3 An exploded view of the structure of the battery cell 10 shown in FIG. Figure 5 A top view of a battery cell 10 according to some embodiments of the present application; Figure 6 For along Figure 5 The battery cell 10 includes a housing component 1, an electrode component 2, a pole component 3 and other functional components.

[0103] The housing component 1 has a receiving cavity therein, and the housing component 1 includes a housing cover 12 and a housing body 11, and the housing cover 12 and the housing body 11 form the receiving cavity. Figure 3 As shown, the X direction is the length direction of the shell component 1 , the Y direction is the thickness direction of the shell component 1 , and the Z direction is the height direction of the shell component 1 .

[0104] The shell cover 12 refers to a component that covers the opening 110 of the shell body 11 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the shell cover 12 can be adapted to the shape of the shell body 11 to match the shell body 11. Optionally, the shell cover 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the shell cover 12 is not easy to deform when it is squeezed and collided, so that the battery cell 10 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the shell cover 12. The electrode terminal can be used to electrically connect to the electrode component 2 for outputting or inputting electrical energy of the battery cell 10. In some embodiments, the shell cover 12 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The material of the shell cover 12 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this.

[0105] The shell body 11 is a component used to cooperate with the shell cover 12 to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode component 2, the electrolyte and other components. The shell body 11 and the shell cover 12 can be independent components, and an opening 110 can be set on the shell body 11, and the shell cover 12 is made to cover the opening 110 at the opening 110 to form the internal environment of the battery cell 10. Without limitation, the shell cover 12 and the shell body 11 can also be integrated. Specifically, the shell cover 12 and the shell body 11 can form a common connection surface before other components enter the shell, and when the interior of the shell body 11 needs to be encapsulated, the shell cover 12 is made to cover the shell body 11. The shell body 11 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell body 11 can be determined according to the specific shape and size of the electrode component 2. The material of the shell body 11 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0106] The electrode component 2 is a component in the battery cell 10 where an electrochemical reaction occurs, and is housed in the shell component 1. Specifically, the shell body 11 may contain one or more electrode components 2. The electrode component 2 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode component 2, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear portion. During the charge and discharge process of the battery device 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear portion connects the electrode terminal to form a current loop.

[0107] According to some embodiments of the present application, referring to Figure 4 and Figure 6 , and further refer to Figure 7 , Figure 7 The schematic diagram of the structure of the electrode component 2 on the first shell wall 13 in some embodiments of the present application. The shell component 1 includes the first shell wall 13, and the first shell wall 13 is involved in forming a receiving cavity. The material of the first shell wall 13 is not limited.

[0108] Please refer to Figure 4 and Figure 6 The electrode component 2 is accommodated in the shell 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 accommodated in the accommodating cavity, the conductive portion 22 is connected to the active material coating portion 21, and the conductive portion 22 may include a pole ear portion, and the pole ear portion includes a multi-layer pole ear sheet.

[0109] The pole component 3 is arranged on the first shell wall 13, and the pole body 31 is connected to the electrode component 2. For example, a mounting hole 131 may be formed on the first shell wall 13, the pole component 3 is arranged at the mounting hole 131, and the pole component 3 is connected to the electrode component 2, so that the pole component 3 blocks the mounting hole 131. For example, the first shell wall 13 may be integrally formed with at least part of the structure of the pole component 3.

[0110] Please refer to Figure 8-Figure 9 , Figure 8 For along Figure 7 Structural cross-section view of line B2-B2; Fig. 9 For along Figure 7 The pole component 3 includes a pole body 31 and a clamping structure 32, the pole body 31 is connected to the electrode component 2, and the clamping structure 32 surrounds the pole body 31. The shapes of the clamping structure 32 and the pole body 31 are not limited, for example, either of them can be processed into a circle, an ellipse, a rectangle, a rectangle with R corners, etc.

[0111] Specifically, the clamping structure 32 includes a main body 321 and a clamping member 322. The main body 321 is arranged around the outer periphery of the clamping member 322, and the main body 321 is connected to the first shell wall 13. The clamping member 322 is arranged on the main body 321. The clamping member 322 can define a clamping groove 3201, and the clamping groove 3201 is used to clamp the pole body 31, so as to fix the pole body 31 on the clamping structure 32.

[0112] The clamping member 322 includes a first clamping portion 3221 and a second clamping portion 3222, and the first clamping portion 3221 and the second clamping portion 3222 clamp the pole body 31. The pole component 3 also includes an insulating sealing structure 33, and the first clamping portion 3221 and the second clamping portion 3222 clamp the pole body 31 through the insulating sealing structure 33, so that the insulating sealing structure 33 insulates and seals the clamping member 322 and the pole body 31, thereby reducing the risk of short circuit problems or other electrical safety accidents on the one hand, and reducing the probability of electrolyte seeping out from the inside of the shell component 1, and moisture and dust entering the shell component 1 on the other hand, thereby improving the reliability of the battery cell 10.

[0113] The first clamping portion 3221 has a different thickness from the main body 321, and the second clamping portion 3222 has a different thickness from the main body 321. Specifically, the thickness of the first clamping portion 3221 is K1, the thickness of the second clamping portion 3222 is K2, and the thickness of the main body 321 is K3. K1, K2 and K3 are not equal and can be flexibly selected according to needs.

[0114] Furthermore, the thickness of the thickest one among the first clamping portion 3221 , the second clamping portion 3222 and the main body portion 321 is greater than the thickness of the first shell wall 13 .

[0115] For example, the one with the largest thickness among the first clamping portion 3221, the second clamping portion 3222 and the main body portion 321 is the main body portion 321, and the thickness of the main body portion 321 is greater than the thickness of the first shell wall 13. For example, the one with the largest thickness among the first clamping portion 3221, the second clamping portion 3222 and the main body portion 321 is the first clamping portion 3221, and the thickness of the first clamping portion 3221 is greater than the thickness of the first shell wall 13. For example, the one with the largest thickness among the first clamping portion 3221, the second clamping portion 3222 and the main body portion 321 is the second clamping portion 3222, and the thickness of the second clamping portion 3222 is greater than the thickness of the first shell wall 13.

[0116] In the technical solution of the embodiment of the present application, by setting a clamping structure 32 and using it in conjunction with an insulating sealing structure 33, the pole body 31 can be fixedly installed on the clamping structure 32, and insulation and sealing between the clamping structure 32 and the pole body 31 can be achieved; the main body 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 pole body 31 and the insulating 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 main body 321, the insulation performance and reliability of the pole 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 seeping out 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.

[0117] Please refer again Fig. 9 In some embodiments, the first clamping portion 3221 is connected to the side of the second clamping portion 3222 facing away from the electrode component 2, and the insulating sealing structure 33 is clamped between the first clamping portion 3221 and the pole body 31, and between the second clamping portion 3222 and the pole body 31.

[0118] Specifically, the first clamping portion 3221 and the second clamping portion 3222 are arranged in the height direction of the active material coating portion 21 of the electrode component 2, one end of the first clamping portion 3221 is connected to the side of the second clamping portion 3222 away from the active material coating portion 21, and the other end of the first clamping portion 3221 is arranged at an interval with the second clamping portion 3222 to define a clamping groove 3201, and the pole body 31 partially extends into the clamping groove 3201, the first clamping portion 3221 can limit the pole body 31 from moving relative to the clamping structure 32 in the direction away from the electrode component 2, and the second clamping portion 3222 can limit the pole body 31 from moving relative to the clamping structure 32 in the direction close to the electrode component 2.

[0119] With such an arrangement, the insulating sealing structure 33 can be arranged around the outer circumference of the pole body 31, with a portion of the insulating sealing structure 33 clamped between the first clamping portion 3221 and the pole body 31, and another portion clamped between the second clamping portion 3222 and the pole body 31, thereby achieving insulation and sealing between the clamping structure 32 and the pole body 31.

[0120] In some embodiments, the main body 321, the first clamping portion 3221 and the second clamping portion 3222 are integrally formed. In other words, the main body 321 and the clamping member 322 of the clamping structure 32 are integrally formed.

[0121] The structure of the clamping structure 32 is simple, and can construct a main body part 321, a first clamping part 3221 and a second clamping part 3222 that are integrally arranged. This not only saves the step of connecting the three, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure 32, thereby improving the insulation and sealing reliability of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the required insulation and sealing requirements.

[0122] Please refer again Figure 7 and Figure 8 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 omitted, which is beneficial to improving production efficiency, and can also improve the strength and rigidity of the overall structure 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.

[0123] Please refer again Figure 4 and Figure 6 The main body 321 of the clamping structure 32 is welded to the first shell wall 13. That is, the main body 321 and the first shell wall 13 are separately arranged, so that the shapes and materials of the clamping structure 32 and the first shell wall 13 can be independently designed to meet the differentiated design under different working conditions.

[0124] Specifically, the clamping structure 32, the pole body 31, and the insulating sealing structure 33 may be assembled to form the pole component 3, and then the assembled pole component 3 may be mounted on the first shell wall 13, and the body portion 321 of the clamping structure 32 may be welded to the first shell wall 13. For example, the body portion 321 and the first shell wall 13 may be connected by laser welding, autogenous welding, or brazing.

[0125] 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.

[0126] In some embodiments, the main body 321, the first clamping portion 3221 and the second clamping portion 3222 are integrally formed. In other words, the main body 321 and the clamping member 322 of the clamping structure 32 are integrally formed.

[0127] The structure of the clamping structure 32 is simple, and can construct a main body part 321, a first clamping part 3221 and a second clamping part 3222 that are integrally arranged. This not only saves the step of connecting the three, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure 32, thereby improving the insulation and sealing reliability of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the required insulation and sealing requirements.

[0128] Please refer again Fig. 9 In some embodiments, the thickness K3 of the main body 321 is greater than the thickness h1 of the first shell wall 13 .

[0129] Here, the “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 smaller 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.

[0130] 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 may be 1 mm, 1.5 mm, 2 mm, etc., so that the first shell wall 13 can meet pressure resistance and safety requirements.

[0131] 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, which makes it easy to achieve lightweight battery cells 10 and reduce transportation costs. On the other hand, the material used for the first shell wall 13 can be reduced, which is conducive to reducing material costs.

[0132] In addition, by increasing the thickness of the main body 321, the structural strength of the main body 321 can be improved. On the one hand, the connection reliability between the main body 321 and the first shell wall 13 can be improved, and the reliability of the pole component 3 on the first shell wall 13 can be improved, so that the reliability of the battery cell 10 is higher. On the other hand, the structural strength of the clamping structure 32 can be improved, thereby improving the pressure resistance of the pole component 3 and further improving the reliability of the battery cell 10.

[0133] For example, the main body 321 of the clamping structure 32 is integrally formed with the first shell wall 13. By increasing the thickness of the main body 321, the strength and rigidity of the overall structure of the main body 321 and the first shell wall 13 can be increased, thereby improving the installation stability and reliability of the pole body 31, and also improving the pressure resistance of the pole body 31, and improving the reliability of the battery cell 10.

[0134] For example, the main body 321 of the clamping structure 32 is separately provided 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, and the first shell wall 13 is not easily deformed, which is conducive to improving the reliability of the battery cell 10.

[0135] Please refer again Fig. 9 , the thickness K2 of the second clamping portion 3222 is smaller than the thickness K3 of the main body portion 321 .

[0136] Here, the “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 the thickness of the second clamping portion 3222 is smaller 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 second clamping portion 3222.

[0137] In the above technical solution, by reducing the thickness of the second clamping portion 3222, the weight of the clamping structure 32 can be reduced, thereby facilitating lightweighting of the battery cell 10 and reducing transportation costs. The material used in the clamping structure 32 can also be reduced, which is conducive to reducing material costs.

[0138] Since the thickness of the main body 321 is greater than the thickness of the first shell wall 13, that is, the thickness of the first shell wall 13 is less than the thickness of the main body 321, the structural strength of the first shell wall 13 may be less than the structural strength of the main body 321, affecting the support reliability of the first shell wall 13 for the pole component 3. Based on this, by increasing the thickness of the main body 321, the structural strength of the main body 321 can be improved. On the one hand, the connection reliability between the main body 321 and the first shell wall 13 can be improved, and the reliability of the pole component 3 on the first shell wall 13 can be improved, so that the reliability of the battery cell 10 is higher. On the other hand, the structural strength of the clamping structure 32 can be improved, thereby improving the pressure resistance of the pole component 3 and further improving the reliability of the battery cell 10.

[0139] If the thickness of the second clamping portion 3222 is too small, the structural strength of the second clamping portion 3222 will be reduced, affecting the clamping ability of the clamping structure 32 to the pole body 31, and affecting 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 of the thickness K3 of the body portion 321.

[0140] In the above technical solution, by limiting the thickness of the second clamping portion 3222 to be greater than half the thickness of the main body portion 321, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33, and thereby enabling the insulating sealing structure 33 to meet the requirements of insulating sealing.

[0141] Please refer again Fig. 9In 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 the thickness of the first clamping portion 3221 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 clamping portion 3221.

[0142] In the above technical solution, by reducing the thickness of the first clamping portion 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easy to achieve lightweight battery cells 10 and reduce transportation costs. The material used in the clamping structure 32 can also be reduced, which is beneficial to reducing material costs. On the other hand, the first clamping portion 3221 can be bent, so that the first clamping portion 3221 and the second clamping portion 3222 can be used to fix the pole body 31.

[0143] In addition, since the thickness of the main body 321 is greater than the thickness of the first shell wall 13, that is, the thickness of the first shell wall 13 is less than the thickness of the main body 321, the structural strength of the first shell wall 13 may be less than the structural strength of the main body 321, affecting the support reliability of the first shell wall 13 for the pole component 3. Based on this, by increasing the thickness of the main body 321, the structural strength of the main body 321 can be improved. On the one hand, the connection reliability between the main body 321 and the first shell wall 13 can be improved, and the reliability of the pole component 3 on the first shell wall 13 can be improved, so that the reliability of the battery cell 10 is higher. On the other hand, the structural strength of the clamping structure 32 can be improved, thereby improving the pressure resistance of the pole component 3 and further improving the reliability of the battery cell 10.

[0144] Please refer again Fig. 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 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.

[0145] In the above technical solution, by reducing the thickness of the first clamping portion 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easy to achieve lightweight battery cells 10 and reduce transportation costs. The material used in the clamping structure 32 can also be reduced, which is beneficial to reducing material costs. On the other hand, the first clamping portion 3221 can be bent, so that the first clamping portion 3221 and the second clamping portion 3222 can be used to fix the pole body 31.

[0146] In addition, by increasing the thickness of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0147] Please refer again Fig. 9 In some embodiments, the first clamping portion 3221 and the second clamping portion 3222 are stamping portions. That is, the first clamping portion 3221 and the second clamping portion 3222 are formed by a stamping process.

[0148] Stamping is a highly automated production process that can produce structures with relatively complex shapes and relatively high strength and rigidity, and can also achieve fast and continuous production.

[0149] Specifically, the preparation process of the clamping structure 32 can be roughly as follows: punching the inner side of the annular incoming material of the clamping structure 32 to form an annular structure with a roughly L-shaped cross-section, and then impacting the inner side of the annular structure again to reduce the thickness of the inner side of the annular structure to form an annular structure with a roughly T-shaped cross-section, that is, the main body 321, the second clamping part 3222 and the first clamping part 3221 before bending are formed, and the thickness K1 of the first clamping part 3221 formed by stamping and the thickness K2 of the second clamping part 3222 are both smaller than the thickness K3 of the main body 321.

[0150] Therefore, in the above technical solution, by adopting the stamping process to process the first clamping part 3221 and the second clamping part 3222, on the one hand, the structural strength and rigidity of the clamping structure 32 can be improved, and on the other hand, the processing efficiency of the clamping structure 32 can be improved and the production cost can be reduced.

[0151] Please refer to Fig.10 , Fig.10 The structure cross-sectional view of the electrode component 2 of some other embodiments of the present application. In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness K3 of the main body portion 321 .

[0152] For example, the thickness of the second clamping portion 3222 may be increased to be greater than the thickness K3 of the body portion 321. For example, the thickness of the body portion 321 may be reduced to be less than the thickness of the second clamping portion 3222.

[0153] In the above technical scheme, by increasing the thickness of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33 so that the insulating sealing structure 33 can meet the requirements of insulating sealing. By reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby making it easy to achieve lightweighting of the battery cell 10 and reduce transportation costs. It can also reduce the materials used in the clamping structure 32, thereby helping to reduce material costs.

[0154] Please refer again Fig.10 In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness K3 of the main body portion 321 .

[0155] For example, the thickness of the first clamping portion 3221 may be increased to be greater than the thickness of the body portion 321. For example, the thickness of the body portion 321 may be reduced to be less than the thickness of the first clamping portion 3221.

[0156] In the above technical scheme, by increasing the thickness of the first clamping portion 3221, the structural strength and rigidity of the first clamping portion 3221 can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion 3221 on the pole body 31 when used in conjunction with the second clamping portion 3222, and improve the installation reliability of the pole body 31. On the other hand, the first clamping portion 3221 can press the insulating sealing structure 33, improve the performance of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing; by reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby facilitating the lightweighting of the battery cell 10 and reducing transportation costs. It can also reduce the materials used in the clamping structure 32, which is conducive to reducing material costs.

[0157] Please refer again Fig.10 In some embodiments, the thickness K1 of the first clamping portion 3221 is smaller than the thickness K2 of the second clamping portion 3222 .

[0158] For example, the thickness of the first clamping portion 3221 can be reduced so that the thickness of the first clamping portion 3221 is smaller 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.

[0159] In the above technical solution, by reducing the thickness of the first clamping portion 3221, on the one hand, the weight of the clamping structure 32 can be reduced, thereby making it easy to achieve lightweight battery cells 10 and reduce transportation costs. The material used in the clamping structure 32 can also be reduced, which is beneficial to reducing material costs. On the other hand, the first clamping portion 3221 can be bent, so that the first clamping portion 3221 and the second clamping portion 3222 can be used to fix the pole body 31.

[0160] In addition, by increasing the thickness of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0161] Please refer again Fig.10 In some embodiments, the first clamping portion 3221 and the main body portion 321 are stamped parts.

[0162] Stamping is a highly automated production process that can produce structures with relatively complex shapes and relatively high strength and rigidity, and can also achieve fast and continuous production.

[0163] Specifically, the preparation process of the clamping structure 32 can be roughly as follows: punching the outer side of the annular incoming material of the clamping structure 32 to form an annular structure with a roughly L-shaped cross-section, and then impacting the outer side of the annular structure again to reduce the thickness of the outer side of the annular structure to form an annular structure with a roughly T-shaped cross-section, that is, the main body 321, the second clamping part 3222 and the first clamping part 3221 before bending are formed, and the thickness K3 of the main body 321 formed by stamping and the thickness K1 of the first clamping part 3221 are both smaller than the thickness K2 of the second clamping part 3222.

[0164] Therefore, in the above technical solution, by adopting the stamping process to process the first clamping part 3221 and the main body part 321, on the one hand, the structural strength and rigidity of the clamping structure 32 can be improved, and on the other hand, the processing efficiency of the clamping structure 32 can be improved and the production cost can be reduced.

[0165] Please refer again Fig.10 In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness h1 of the first shell wall 13 .

[0166] 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 reduced so that the thickness of the first shell wall 13 is less than the thickness of the second clamping portion 3222.

[0167] In the above technical scheme, by increasing the thickness of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33 so that the insulating sealing structure 33 can meet the requirements of insulating sealing. By reducing the thickness of the first shell wall 13, on the one hand, the weight of the shell component 1 can be reduced, which makes it easy to achieve lightweight battery cells 10 and reduce transportation costs. On the other hand, the material used for the first shell wall 13 can be reduced, which is beneficial to reducing material costs.

[0168] Please refer again Fig.10 In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness h1 of the first shell wall 13 .

[0169] For example, the thickness of the first clamping portion 3221 can be increased to make the thickness of the first clamping portion 3221 greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be reduced to make the thickness of the first shell wall 13 less than the thickness of the first clamping portion 3221.

[0170] In the above technical scheme, by increasing the thickness of the first clamping portion 3221, the structural strength and rigidity of the first clamping portion 3221 can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion 3221 and the second clamping portion 3222 on the pole body 31 when used in conjunction, and improve the installation reliability of the pole body 31. On the other hand, the first clamping portion 3221 can press the insulating sealing structure 33 so that the insulating sealing structure 33 can meet the insulating 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, which makes it easy to achieve lightweight battery cells 10 and reduce transportation costs. On the other hand, the material used for the first shell wall 13 can be reduced, which is conducive to reducing material costs.

[0171] In some embodiments, the thickness of the smaller structure of the body portion 321 and the second clamping portion 3222 is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm, or equal to 5 mm. For example, the thickness of the smaller structure of the body portion 321 and the second clamping portion 3222 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0172] If the thickness of the main body 321 is too small, it will affect the connection reliability between the main body 321 and the first shell wall 13, resulting in poor reliability of the pole component 3 on the first shell wall 13. If the thickness of the main body 321 is too large, the weight of the pole component 3 will increase, making it difficult to achieve lightweight battery cells 10, and will also increase the production cost of the pole component 3.

[0173] If the thickness of the second clamping portion 3222 is too small, it will affect the clamping ability of the second clamping portion 3222 and the first clamping portion 3221 on the pole body 31 when they are matched, and will also affect the pressing ability of the second clamping portion 3222 on the insulating sealing structure 33, thereby affecting the insulating sealing effect of the insulating sealing structure 33.

[0174] Therefore, in the above technical solution, by limiting the thickness of the smaller structure between the main body 321 and the second clamping portion 3222 to meet the above conditions, the structural strength of the clamping structure 32 can be improved, thereby improving the reliability of the pole component 3.

[0175] Please refer to Figure 11-13 , Fig.11 It is a schematic structural diagram of the electrode component 2 on the first shell wall 13 in some other embodiments of the present application; Fig.12 For along Fig.11 Structural cross-sectional view of the D2-D2 line; Fig.13 For along Fig.11 The thickness K3 of the main body 321 is smaller than the thickness h1 of the first shell wall 13 .

[0176] For example, the thickness of the body portion 321 may be reduced so that the thickness of the body portion 321 is smaller than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 may be increased so that the thickness of the first shell wall 13 is greater than the thickness of the body portion 321.

[0177] 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 easy to achieve lightweight battery cells 10 and reduce transportation costs. The material used in the clamping structure 32 can also be reduced, which is conducive to reducing material costs.

[0178] In addition, 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 ability of the first shell wall 13 to resist external force impact and reducing the risk of deformation of the first shell wall 13. On the one hand, the support reliability of the first shell wall 13 to the pole component 3 can be improved. On the other hand, the strength of the connection position between the first shell wall 13 and the main body 321 can be improved, and the reliability of the pole component 3 on the first shell wall 13 can be improved, so that the reliability of the battery cell 10 is higher.

[0179] For example, the main body 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 main body 321 and the first shell wall 13 can be increased, thereby improving the installation stability and reliability of the pole body 31, and also improving the pressure resistance of the pole body 31, and improving the reliability of the battery cell 10.

[0180] For example, the main body 321 of the clamping structure 32 is separately provided 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, and the first shell wall 13 is not easily deformed, which is conducive to improving the reliability of the battery cell 10.

[0181] Please refer again Fig.13 In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness K3 of the body portion 321. For example, the second clamping portion 3222 may be enlarged so that the thickness K2 of the second clamping portion 3222 is greater than the thickness K3 of the body portion 321. For example, the thickness of the body portion 321 may be reduced so that the thickness K3 of the body portion 321 is less than the thickness K2 of the second clamping portion 3222.

[0182] 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 easy to achieve lightweight battery cells 10 and reduce transportation costs. The material used in the clamping structure 32 can also be reduced, which is conducive to reducing material costs.

[0183] Since the thickness K3 of the main body 321 is less than the thickness h1 of the first shell wall 13, the reliability of the pole component 3 may be affected. Based on this, by increasing the thickness K2 of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0184] If the thickness of the body 321 is too small, the connection reliability between the body 321 and the first shell wall 13 will be reduced, resulting in poor installation reliability of the pole component 3. Therefore, in some embodiments, the thickness K3 of the body 321 is greater than half of the thickness K2 of the second clamping portion 3222.

[0185] 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 portion 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, thereby improving the installation reliability of the pole component 3, and also improving the insulation sealing strength of the insulation sealing structure 33.

[0186] Please refer to Fig.14 , Fig.14 It is a cross-sectional view of the structure of the electrode component 2 according to some other embodiments of the present application. In some embodiments, the thickness K2 of the second clamping portion 3222 is less than the thickness K3 of the main body portion 321 .

[0187] For example, the thickness of the second clamping portion 3222 may be reduced so that the thickness of the second clamping portion 3222 is smaller than the thickness of the body portion 321. For example, the thickness of the body portion 321 may be increased so that the thickness of the body portion 321 is greater than the thickness of the second clamping portion 3222.

[0188] In the above technical solution, by reducing the thickness of the second clamping portion 3222, the weight of the clamping structure 32 can be reduced, thereby making it easy to achieve lightweight battery cells 10 and reduce transportation costs. The materials used in the clamping structure 32 can also be reduced, which is beneficial to reducing material costs. By increasing the thickness of the main body portion 321, the structural strength of the main body portion 321 can be improved, thereby improving the connection reliability between the clamping body portion 321 and the first shell wall 13, thereby improving the installation reliability of the pole component 3, and also improving the insulating sealing strength of the insulating sealing structure 33.

[0189] In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness K3 of the main body portion 321 .

[0190] For example, the thickness of the first clamping portion 3221 may be increased to be greater than the thickness of the body portion 321. For example, the thickness of the body portion 321 may be reduced to be less than the thickness of the first clamping portion 3221.

[0191] In the above technical solution, by increasing the thickness of the first clamping portion 3221, the structural strength and rigidity of the first clamping portion 3221 can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion 3221 on the pole body 31 when used in conjunction with the second clamping portion 3222, thereby improving the installation reliability of the pole body 31. On the other hand, the first clamping portion 3221 can press the insulating sealing structure 33, thereby improving the performance of the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0192] In addition, by reducing the thickness of the main body 321, the weight of the clamping structure 32 can be reduced, thereby facilitating lightweighting of the battery cell 10 and reducing transportation costs. The material used in the clamping structure 32 can also be reduced, which is conducive to reducing material costs.

[0193] In some embodiments, the thickness K2 of the second clamping portion 3222 is greater than the thickness h1 of the first shell wall 13 .

[0194] 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 reduced so that the thickness of the first shell wall 13 is less than the thickness of the second clamping portion 3222.

[0195] In the above technical solution, by increasing the thickness of the second clamping portion 3222, the structural strength and rigidity of the second clamping portion 3222 can be improved. On the one hand, it is beneficial to improve the clamping ability of the second clamping portion 3222 on the pole body 31 when used in conjunction with the first clamping portion 3221, thereby improving the installation reliability of the pole body 31. On the other hand, the second clamping portion 3222 can press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0196] 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, which makes it easier to achieve lightweight battery cells 10 and reduce transportation costs. On the other hand, the material used for the first shell wall 13 can be reduced, which is conducive to reducing material costs.

[0197] In some embodiments, the thickness K1 of the first clamping portion 3221 is greater than the thickness h1 of the first shell wall 13 .

[0198] For example, the thickness of the first clamping portion 3221 can be increased to make the thickness of the first clamping portion 3221 greater than the thickness of the first shell wall 13. For example, the thickness of the first shell wall 13 can be reduced to make the thickness of the first shell wall 13 less than the thickness of the first clamping portion 3221.

[0199] In the above technical solution, by increasing the thickness of the first clamping portion 3221, the structural strength and rigidity of the first clamping portion 3221 can be improved. On the one hand, it is beneficial to improve the clamping ability of the first clamping portion 3221 on the pole body 31 when used in conjunction with the second clamping portion 3222, thereby improving the installation reliability of the pole body 31. On the other hand, the first clamping portion 3221 can press the insulating sealing structure 33, so that the insulating sealing structure 33 can meet the requirements of insulating sealing.

[0200] 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, which makes it easier to achieve lightweight battery cells 10 and reduce transportation costs. On the other hand, the material used for the first shell wall 13 can be reduced, which is conducive to reducing material costs.

[0201] In some embodiments, the thickness of the smaller structure of the body portion 321 and the second clamping portion 3222 is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm, or equal to 5 mm. For example, the thickness of the smaller structure of the body portion 321 and the second clamping portion 3222 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0202] If the thickness of the main body 321 is too small, it will affect the connection reliability between the main body 321 and the first shell wall 13, resulting in poor reliability of the pole component 3 on the first shell wall 13. If the thickness of the main body 321 is too large, the weight of the pole component 3 will increase, making it difficult to achieve lightweight battery cells 10, and will also increase the production cost of the pole component 3.

[0203] If the thickness of the second clamping portion 3222 is too small, it will affect the clamping ability of the second clamping portion 3222 and the first clamping portion 3221 on the pole body 31 when they are matched, and will also affect the pressing ability of the second clamping portion 3222 on the insulating sealing structure 33, thereby affecting the insulating sealing effect of the insulating sealing structure 33.

[0204] Therefore, in the above technical solution, by limiting the thickness of the smaller structure between the main body 321 and the second clamping portion 3222 to meet the above conditions, the structural strength of the clamping structure 32 can be improved, thereby improving the reliability of the pole component 3.

[0205] Please refer again Fig. 9 and Fig.10 , Fig.13 and Fig.14 In some embodiments, the pole component 3 further includes an outer insulating member 34 , and the outer insulating member 34 at least partially covers a side of the first clamping portion 3221 away from the insulating sealing structure 33 .

[0206] The pole body 31 can be electrically connected to the busbar. The external insulator 34 can separate the clamping structure 32 and the busbar, so as to insulate the clamping structure 32 and the busbar, and the first shell wall 13 and the busbar, thereby reducing the short circuit problem and improving the reliability of the battery cell 10.

[0207] According to 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 has no sealing effect (such as a plastic part), or the outer insulating part 34 can be set as a compressible insulating part with a sealing effect (such as an elastic rubber part) to meet different actual requirements.

[0208] In some embodiments, the outer insulator 34 is connected to the insulating sealing structure 33 .

[0209] Please refer to Figure 15-17 , Fig.15 Schematic diagram of the structure of the pole component 3 on the first shell wall 13 of some other embodiments of the present application; Fig.16 for Fig.15 An exploded view of the structure of the pole component 3 and the first shell wall 13 shown in FIG. Fig.17 for Fig.16 3 and the first shell wall 13. The clamping structure 32 is provided with a connecting portion 3202, and the insulating sealing structure 33 and the outer insulating member 34 are connected through the connecting portion 3202. That is, part of the structure of the insulating sealing structure 33 and / or part of the structure of the outer insulating member 34 extend into the connecting portion 3202, so that the two are connected.

[0210] For example, after the first shell wall 13 and the pole component 3 without the external insulating part 34 are assembled, the assembly can be placed in a mold, and then a melt for forming the external insulating part 34 can be injected into the mold. The melt can be fused with the insulating sealing structure 33 through the connecting portion 3202. After the melt solidifies, the external insulating part 34 is formed, and the external insulating part 34 is connected to the insulating sealing structure 33.

[0211] For example, the outer insulating part 34 can also be a preformed structure. After the first shell wall 13 and the pole component 3 without the outer insulating part 34 are assembled, the outer insulating part 34 can be attached to the outer wall of the clamping groove 3201 formed by the clamping structure 32, and the outer insulating part 34 can be partially passed through the connecting part 3202 to contact or connect with the insulating sealing structure 33.

[0212] In the above technical solution, by connecting the outer insulating part 34 with the insulating sealing structure 33, the installation reliability of the outer insulating part 34 can be improved, so that the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component can be further improved, and the outer insulating part 34 is connected to the insulating sealing structure 33, which can further improve the insulation reliability between the clamping structure 32 and the pole body 31, thereby improving the use reliability of the battery cell 10.

[0213] Please refer again Fig.17In some embodiments, the connecting portion 3202 includes a notch 3202a, which is formed at the notch of the clamping groove 3201, and the notch 3202a is located at the end of the first clamping portion 3221 away from the second clamping portion 3222.

[0214] There may be a plurality of notches 3202 a , and the plurality of notches 3202 a are arranged at intervals in the circumferential direction of the first clamping portion 3221 around the pole body 31 .

[0215] In the above technical solution, by setting a notch 3202a at the end of the first clamping portion 3221 away from the second clamping portion 3222, on the one hand, it is beneficial to bend the end of the first clamping portion 3221 away from the second clamping portion 3222 relative to the second clamping portion 3222, thereby forming a clamping groove 3201, so that the pole body 31 is fixed on the clamping structure 32; on the other hand, the external insulating part 34 and the insulating sealing structure 33 can be connected through the notch 3202a, thereby improving the installation reliability of the external insulating part 34, thereby further improving the insulation reliability between the clamping structure 32 and the collector component, and between the first shell wall 13 and the collector component.

[0216] 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 notch 3202a extends from the end of the first clamping portion 3221 away from the second clamping portion 3222 to the bent position.

[0217] Specifically, the first clamping portion 3221 includes a first extension section 32211, a second extension section 32212 and an arc extension section 32213. The first extension section 32211 is arranged on the circumferential side of the pole body 31, and the first extension section 32211 is connected to the second clamping portion 3222. The second extension section 32212 is located on the side of the pole body 31 away from the electrode component 2, and the second extension section 32212 and the second clamping portion 3222 are arranged relatively spaced apart. The first extension section 32211 and the second extension section 32212 are connected by the arc extension section 32213, and the arc extension section 32213 is the position where the first clamping portion 3221 is bent. The notch 3202a can extend from the end of the second extension section 32212 away from the first extension section 32211 to the arc extension section 32213.

[0218] In the above technical solution, by setting the notch 3202a to extend from the end of the first clamping portion 3221 away from the second clamping portion 3222 to the bending position, on the one hand, the problems of material stacking and wrinkles in the first clamping portion 3221 during the bending process can be reduced, which is conducive to bending the first clamping portion 3221 relative to the second clamping portion 3222, thereby fixing the pole body 31 on the clamping structure 32; on the other hand, the bent first clamping portion 3221 can compress the insulating sealing structure 33, so that the insulation between the pole body 31 and the first clamping portion 3221 is more reliable.

[0219] Please refer to Fig.18 , Fig.18 The connecting portion 3202 is a through hole 3202b with a closed hole wall on all sides, and the through hole 3202b is opened in the first clamping portion 3221, that is, the through hole 3202b passes through the first clamping portion 3221 to form the inner wall and outer wall of the clamping groove 3201.

[0220] There may be a plurality of through holes 3202b, which are arranged at intervals in the circumferential direction of the first clamping portion 3221 around the pole body 31. The through holes 3202b may be round holes, square holes, or the like.

[0221] In the above technical solution, by setting a through hole 3202b on the first clamping portion 3221, the external insulating part 34 and the insulating sealing structure 33 can be connected through the through hole 3202b, thereby improving the installation reliability of the external 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.

[0222] 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 3202 b avoids the bent position of the first clamping portion 3221 .

[0223] Among them, the through hole 3202b can be processed before the first clamping part 3221 is bent. Since the first clamping part 3221 after the through hole 3202b is processed, the deformation of the material at the bending position after being squeezed or stretched is relatively large. Therefore, in order to reduce the influence of the deformation at the bending position on the change of the shape of the through hole 3202b, the through hole 3202b needs to be avoided from the bending position of the first clamping part 3221, so that the outer insulating member 34 and the insulating sealing structure 33 can be fully contacted and connected at the through hole 3202b, thereby improving the installation reliability of the outer insulating member 34.

[0224] Please refer again Fig.18The first clamping portion 3221 is divided into two parts according to the bending position of the first clamping portion 3221 (such as the above-mentioned arc extension section 32213). The part close to the second clamping portion 3222 is the first part (such as the above-mentioned first extension section 32211), and the part away from the second clamping portion 3222 is the second part (such as the above-mentioned second extension section 32212). The through hole 3202b is set in the first part.

[0225] After the first clamping portion 3221 is bent, the first part of the first clamping portion 3221 has the smallest deformation or even almost no deformation, while the bent position of the first clamping portion 3221 and the second part may have problems such as material stacking and wrinkles. That is, the bent position of the first clamping portion 3221 and the second part are deformed more greatly than the first part, making it difficult to meet the design requirements.

[0226] Therefore, setting the through hole 3202b in the first part of the first clamping portion 3221 can reduce the impact of the first clamping portion 3221 on the through hole 3202b when bending, which is beneficial to improving the installation reliability of the external insulating member 34, thereby further improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0227] Please refer again Fig.17 In some embodiments, there are multiple communicating portions 3202 , and the multiple communicating portions 3202 are spaced apart in the circumferential direction around the pole body 31 on the first clamping portion 3221 .

[0228] The locations of the plurality of connecting portions 3202 may be selected according to the shapes of the pole body 31 and the clamping structure 32. For example, the pole body 31 and the clamping structure 32 are circular, and the plurality of connecting portions 3202 may be evenly and spacedly arranged in the circumferential direction of the pole body 31. For example, the pole body 31 and the clamping structure 32 are rectangular, rectangular with R corners, etc., and the plurality of connecting portions 3202 may be symmetrically distributed at the positions where the two long sides of the pole body 31 are located.

[0229] In the above technical solution, by providing a plurality of connecting portions 3202, the insulating sealing structure 33 and the external insulating member 34 are connected at the positions where the plurality of connecting portions 3202 are located, that is, the insulating sealing structure 33 and the external insulating member 34 are connected at a plurality of positions on the circumference of the pole body 31, which can further improve the installation reliability of the external insulating member 34, thereby greatly improving the insulation reliability between the clamping structure 32 and the busbar component, and between the first shell wall 13 and the busbar component.

[0230] 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. In other words, the surface of the pole component 3 facing away from the electrode component 2 is relatively flat.

[0231] Such arrangement can simplify the external structure of the battery cell 10 and make the appearance of the battery cell 10 beautiful, and can also reduce the stopping effect of the external insulating member 34 on the busbar component and improve the connection reliability between the pole body 31 and the busbar component.

[0232] Please refer again Fig.18 In some embodiments, a peripheral edge of a surface of one end of the pole body 31 facing away from the electrode component 2 has a step 311 , and the outer insulating member 34 at least partially extends to the step 311 .

[0233] For example, the step 311 may be an annular structure, and correspondingly, the end of the outer insulating member 34 away from the second clamping portion 3222 has an annular matching portion, and the annular matching portion is located at the step 311. For example, the step 311 may be an intermittent step surrounding the circumference of the pole body 31, and correspondingly, the end of the outer insulating member 34 away from the second clamping portion 3222 has an intermittent matching portion surrounding the circumference of the pole body 31 to match the intermittent step.

[0234] Furthermore, the surface of the portion of the outer insulating member 34 extending onto the step 311 which faces away from the step 311 is flush with the end surface of the pole body 31 which faces away from the electrode component 2 , so as to improve the connection reliability between the pole body 31 and the busbar component.

[0235] In the above technical solution, by setting a step 311 on the pole body 31, the contact area between the outer insulating member 34 and the pole body 31 can be increased, thereby increasing the connection reliability between the outer insulating member 34 and the pole body 31, making the insulation reliability between the busbar component and the clamping structure 32 higher, and the outer insulating member 34 is connected to the insulating sealing structure 33, which can completely separate the pole body 31 and the clamping structure 32, so that the insulation reliability between the pole body 31 and the clamping structure 32 is higher.

[0236] Please refer again Fig.18 , the step 311 is an annular structure, and the outer insulating member 34 is arranged around the first clamping portion 3221. By setting the step 311 as an annular structure, the contact area between the outer insulating member 34 and the pole body 31 can be further increased, thereby increasing the connection reliability between the outer insulating member 34 and the pole body 31, and making the insulation reliability between the busbar component and the clamping structure 32 higher.

[0237] Please refer to Fig.18 , and further refer to Fig.19 , Fig.19The following is a schematic diagram of the structure of the pole component of some other embodiments of the present application. The pole body 31 at least partially protrudes from the surface of the outer insulating member 34 on the side away from the pole body 31. When the pole component 3 of the battery cell 10 is connected to the busbar component, the outer insulating member 34 will not affect the connection reliability between the pole body 31 and the busbar component on the basis of satisfying the insulation effect, and can also reduce the interference of the pole component 3 with other components outside the shell component 1 (such as the busbar component, etc.), which is conducive to improving the reliability of the battery cell 10.

[0238] For example, refer to Fig.19 The pole body 31 has a step 311 on its peripheral edge at one end surface facing away from the electrode component 2 , and the outer insulating member 34 at least partially extends to one side of the step 311 , for example, extends to the side of the step 311 close to the flange portion 312 , so as to be flush with the step surface of the step 311 .

[0239] In the above technical solution, by extending the outer insulating member 34 at least partially to the side of the step 311 close to the flange portion 312 so as to be flush with the step surface of the step 311, on the one hand, the external structure of the battery cell 10 can be simplified to make the appearance of the battery cell 10 beautiful, and on the other hand, the pole body 31 can be made to at least partially protrude from the side surface of the outer insulating member 34 away from the flange portion 312, so that the outer insulating member 34 can reduce the interference of the pole component 3 with other components outside the shell component 1 (such as the busbar component, etc.) on the basis of satisfying the insulation effect, which is beneficial to improve the reliability of the battery cell 10.

[0240] Furthermore, the step 311 is an annular structure, and the outer insulating member 34 is arranged around the first clamping portion 3221, which can improve the insulation reliability of the outer insulating member 34, make the insulation reliability between the busbar component and the clamping structure 32 higher, and reduce the risk of short circuit problems or other electrical safety accidents.

[0241] Please refer again Fig.18 In some embodiments, the first clamping portion 3221 includes a first extension section 32211, a second extension section 32212 and an arc extension section 32213. The first extension section 32211 is arranged on the circumference of the pole body 31 and is connected to the second clamping portion 3222. The second extension section 32212 is located on the side of the pole body 31 away from the electrode component 2 and is arranged relatively spaced from the second clamping portion 3222. The first extension section 32211 and the second extension section 32212 are connected by the arc extension section 32213.

[0242] The outer insulating member 34 includes a first insulating segment 341, a second insulating segment 342 and an arc insulating segment 343. The first insulating segment 341 covers the side of the first extension segment 32211 away from the pole body 31, the second insulating segment 342 covers the side of the second extension segment 32212 away from the pole body 31, and the first insulating segment 341 and the second insulating segment 342 are connected by the arc insulating segment 343.

[0243] In the above technical solution, by setting the first clamping portion 3221 to include a first extension segment 32211, a second extension segment 32212 and an arc extension segment 32213, and setting the outer insulating member 34 to include a first insulating segment 341, a second insulating segment 342 and an arc insulating segment 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.

[0244] There are multiple second extension sections 32212 , which are arranged at intervals in the circumferential direction of the pole body 31 , and two adjacent second extension sections 32212 define at least a portion of the connecting portion 3202 .

[0245] For example, when the pole body 31, the clamping structure 32, and the insulating sealing structure 33 are assembled, the pole body 31, the insulating sealing structure 33, and the clamping structure 32 can be firstly arranged from the inside to the outside, and then the first clamping portion 3221 of the clamping structure 32 is bent relative to the first clamping portion 3221, so that a part of the first clamping portion 3221 is bent toward the pole body 31, and the insulating sealing structure 33 is pressed, so that the pole body 31 is fixed on the clamping structure 32, and the insulating sealing structure 33 is clamped between the pole body 31 and the clamping structure 32.

[0246] In the above technical solution, by setting the first clamping portion 3221 to include multiple second extension portions, and using the connecting portion 3202 defined between two adjacent second extension portions, on the one hand, the problems of material stacking and wrinkles in the first clamping portion 3221 during the bending process can be reduced, which is conducive to bending the first clamping portion 3221 relative to the second clamping portion 3222, thereby fixing the pole body 31 on the clamping structure 32; on the other hand, the bent first clamping portion 3221 can compress the insulating sealing structure 33, so that the insulation between the pole body 31 and the first clamping portion 3221 is more reliable.

[0247] In some embodiments, the side surface of the second insulating section 342 facing away from the second extension section 32212 is in the same plane as the end surface of the pole body 31 facing away from the electrode component 2. In other words, the side surface of the second insulating section 342 facing away from the second extension section 32212 is in the same height position as the end surface of the pole body 31 facing away from the electrode component 2, and there is no height difference between the two.

[0248] When the pole component 3 of the battery cell 10 is connected to the busbar component, the external insulating member 34 will not affect the connection reliability between the pole body 31 and the busbar component while satisfying the insulation effect, which is beneficial to improving the reliability of the battery cell 10 .

[0249] Therefore, such a configuration can make the end surface of the pole component 3 away from the electrode component 2 relatively flat, which can reduce the interference of the pole component 3 with other components outside the shell component 1 (such as the current collecting component, etc.), and improve the reliability of the battery cell 10.

[0250] Please refer again Fig.18 and Fig.19 In some embodiments, the pole body 31 partially protrudes from a side surface of the second insulating section 342 that is away from the second extending section 32212 .

[0251] When the pole component 3 of the battery cell 10 is connected to the busbar component, the external insulating member 34 will not affect the connection reliability between the pole body 31 and the busbar component while satisfying the insulation effect, which is beneficial to improving the reliability of the battery cell 10 .

[0252] 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 on other components outside the shell component 1 (such as the busbar component, etc.) can be reduced, thereby improving the reliability of the battery cell 10.

[0253] Please refer again Fig.18 and Fig.19 In some embodiments, the circumferential side of the pole body 31 has a flange portion 312. In the thickness direction of the first shell wall 13, the flange portion 312 is located between the first clamping portion 3221 and the second clamping portion 3222. The first clamping portion 3221 and the second clamping portion 3222 clamp the flange portion 312 on both sides along the thickness direction through the insulating sealing structure 33.

[0254] The flange portion 312 may be a peripheral structure located at the pole body 31. For example, the flange portion 312 may be an annular structure located at the periphery of the pole body 31; for another example, the flange portion 312 may be a plurality of discontinuous structures located at the periphery of the pole body 31.

[0255] 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 arranged opposite to the outer side of the flange portion 312, and the second clamping portion 3222 can be arranged 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 pole body 31 on the clamping structure 32.

[0256] In the above technical solution, a flange portion 312 is provided on the peripheral side of the pole body 31, and the first clamping portion 3221 and the second clamping portion 3222 are respectively located on both sides of the flange portion 312 in the thickness direction of the first shell wall 13 to limit the movement of the pole body 31 relative to the clamping structure 32 in the direction away from or close to the electrode component 2. The structure of the flange portion 312 is simple and easy to process.

[0257] Please refer again Fig.18 and Fig.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 portion 3221 and the flange portion 312 , and the sealing ring 332 is disposed between the second clamping portion 3222 and the flange portion 312 .

[0258] Among them, according to 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 has no sealing effect (such as a plastic part), or the first inner insulating part 3311 can be set as a compressible insulating part with a sealing effect (such as an elastic rubber part) to meet different actual requirements.

[0259] The sealing ring 332 can be made of a material that has both sealing and insulating properties, such as an elastic rubber member, so that the required sealing requirements can be met by designing the shape and position of the sealing ring 332.

[0260] In the above technical solution, by arranging the first inner insulating part 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, and by arranging the 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 coordination of the pole component 3 and the first shell wall 13, and can save installation time and cost.

[0261] In addition, by clamping the first inner insulating member 3311 between the first clamping portion 3221 and the flange portion 312 and between the second clamping portion 3222 and the flange portion 312, it is beneficial to insulate and seal the matching position of the clamping structure 32 and the pole body 31 in a shorter path, thereby improving the reliability of the insulating seal and helping to reduce the size of the first inner insulating member 3311 and the sealing ring 332, making it easy to clamp them, making it difficult for the insulating performance and sealing performance to fail, thereby improving the insulating sealing effect.

[0262] Exemplarily, the pole component 3 can be tested for air tightness when it is received or when the pole component 3 is processed to determine whether a reliable seal is formed at the connection position between the clamping structure 32 and the pole body 31. If the seal is reliable, the pole component 3 can be connected to the first shell wall 13.

[0263] Please refer to Fig.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 arranged between the first clamping portion 3221 and the flange portion 312, and the other portion is arranged between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 is arranged between one end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0264] Please refer to Fig.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 arranged between the first clamping portion 3221 and the flange portion 312. A portion of the sealing ring 332 is arranged between the second clamping portion 3222 and the flange portion 312. One end of the sealing ring 332 extends to the connection position between the first clamping portion 3221 and the second clamping portion 3222, and the other end extends to between one end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0265] Please refer to Fig. 20 and Fig.21 , Fig. 20 This is a schematic structural diagram of a pole component 3 of some further embodiments of the present application; Fig.21 The insulating sealing structure 33 includes an integrally arranged sealing ring 332 , which is located between the first clamping portion 3221 and the flange portion 312 , and between the second clamping portion 3222 and the flange portion 312 .

[0266] For example, a portion of the sealing ring 332 may be clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312 , and another portion may be clamped between the second clamping portion 3222 and a side of the flange portion 312 close to the electrode component 2 .

[0267] Specifically, Fig. 20 As shown, the sealing ring 332 may include a first sealing portion 3321 and a second sealing portion 3322 connected to each other, the first sealing portion 3321 being clamped between the second clamping portion 3222 and the side of the flange portion 312 close to the electrode component 2 , and the second sealing portion 3322 being clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312 .

[0268] For example, the sealing ring 332 can be partially clamped between the first clamping portion 3221 and the side of the flange portion 312 facing away from the electrode component 2, partially clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312, and another partially clamped between the second clamping portion 3222 and the side of the flange portion 312 close to the electrode component 2.

[0269] Specifically, Fig.21 As shown, the sealing ring 332 may include a first sealing portion 3321, a second sealing portion 3322 and a third sealing portion 3323 connected to each other, 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 close to the electrode component 2, the second sealing portion 3322 is clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312, and 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 close to the electrode component 2, thereby increasing the compression amount of the sealing ring 332 and improving reliability.

[0270] In the above technical solution, by simultaneously arranging the integrally arranged sealing ring 332 between the first clamping portion 3221 and the flange portion 312, and between the second clamping portion 3222 and the flange portion 312, multi-directional and multi-positional sealing cooperation can be achieved, thereby reducing sealing failure and helping to improve the sealing effect of the sealing ring 332, thereby meeting the required sealing requirements.

[0271] Please refer to Fig. 20 and Fig.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 arranged between the first clamping portion 3221 and the flange portion 312. The sealing ring 332 is arranged between the connecting position of the first clamping portion 3221 and the second clamping portion 3222 and the flange portion 312. The second inner insulating member 3312 is arranged between the position of the second clamping portion 3222 away from the first clamping portion 3221 and the flange portion 312.

[0272] The shape of the sealing ring 332 may 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 arranged at an angle, and the sealing ring 332 may include a first sealing portion 3321 and a second sealing portion 3322 connected to each other, and correspondingly, the first sealing portion 3321 and the second sealing portion 3322 are arranged at an angle, the first sealing portion 3321 is clamped between the second clamping portion 3222 and a side of the flange portion 312 close to the electrode component 2, and the second sealing portion 3322 is clamped between the first clamping portion 3221 and the radial 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.

[0273] Since one end of the second clamping portion 3222 is connected to the first clamping portion 3221, the other end of the second clamping portion 3222 (the end of the second clamping portion 3222 away from the first clamping portion 3221) is a free end, that is, the second clamping portion 3222 can be regarded as a cantilever structure. Therefore, when the pole body 31 is compressed or pulled, the second clamping portion 3222 may be deformed relative to the first shell wall 13, and the end of the second clamping portion 3222 connected to the first clamping portion 3221 (the fixed end of the second clamping portion 3222) is deformed the most, or even remains unchanged, and the end of the second clamping portion 3222 away from the first clamping portion 3221 (the free end) is deformed the most. If the sealing ring 332 is set between the end of the second clamping portion 3222 away from the first clamping portion 3221 and the flange portion 312, the sealing effect of the sealing ring 332 may be affected.

[0274] Therefore, by arranging the sealing ring 332 between the connection position of the first clamping portion 3221 and the second clamping portion 3222 and the flange portion 312, that is, equivalent to arranging the sealing ring 332 between the position of the second clamping portion 3222 close to its fixed end and the flange portion 312, the influence of the deformation of the second clamping portion 3222 when the pole body 31 is compressed or pulled on the sealing effect of the sealing ring 332 can be reduced, the sealing failure can be reduced, and the sealing ring 332 can meet the required sealing requirements.

[0275] The first inner insulating member 3311 is arranged between the first clamping portion 3221 and the flange portion 312, so as to achieve insulation between the first clamping portion 3221 and the pole body 31; the second inner insulating member 3312 is arranged between the second clamping portion 3222 away from the first clamping portion 3221 and the flange portion 312, so as to achieve insulation between the pole body 31 and the second clamping portion 3222, thereby further improving the self-insulation of the pole component 3 itself, facilitating the installation and coordination of the pole component 3 and the first shell wall 13, and saving installation time and cost.

[0276] For example, after the pole body 31, the clamping structure 32, the sealing ring 332 and the first inner insulating member 3311 are assembled, the assembly can be placed in a mold, and then a melt for forming the second inner insulating member 3312 is injected into the mold, and 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 insulating member 3312 is formed, and the second inner insulating member 3312 is connected to the sealing ring 332. For example, the second inner insulating member 3312 can also be a preformed structure, that is, the pole body 31, the clamping structure 32, the sealing ring 332, the first inner insulating member 3311 and the second inner insulating member 3312 can be directly assembled together.

[0277] Therefore, in the above technical solution, by adopting the first inner insulator 3311, the sealing ring 332 and the second inner insulator 3312, and by reasonably arranging the sealing ring 332, the first inner insulator 3311 and the second inner insulator 3312 between the pole body 31 and the clamping structure 32, it is possible to reduce insulation and sealing failures, and better improve the insulation and sealing effect between the pole body 31 and the clamping structure 32. On the one hand, this can reduce the risk of short circuit problems or other electrical safety accidents, and on the other hand, it can reduce the probability of electrolyte seeping out from the inside of the shell component 1 and moisture and dust entering the shell component 1, thereby improving the reliability of the battery cell 10.

[0278] Please refer again Fig.21 In some embodiments, the end face of the pole body 31 facing the electrode component 2 is flush with the surface of the first shell wall 13 facing the electrode component 2. Here, the end face and the surface are "flush" means that the end face and the surface are at the same height position, and there is no height difference between the two, that is, the end face of the pole body 31 facing the electrode component 2 and the surface of the first shell wall 13 facing the electrode component 2 are in the same plane.

[0279] In the above technical solution, by making the end surface of the pole body 31 facing the electrode component 2 flush with the 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 is relatively flat towards the electrode component 2, which can reduce the interference of the pole component 3 with other components in the shell component 1 and simplify the structure of other components in the shell component 1.

[0280] Please refer again Fig. 20 In other embodiments, an end surface of the pole body 31 facing the electrode component 2 is located on a side of the first shell wall 13 facing the electrode component 2 and away from the electrode component 2 .

[0281] That is, the distance between the end face of the pole body 31 facing the electrode component 2 and one end of the active material coating portion 21 of the electrode component 2 is greater than the distance between the side surface of the first shell wall 13 facing the electrode component 2 and one end of the active material coating portion 21 of the electrode component 2, so that the assembly of the first shell wall 13 and the pole component 3 is formed with a receiving groove 301 on the side facing the electrode component 2, and the receiving groove 301 is open in the direction of the electrode component 2, and the receiving groove 301 can be used to receive at least a part of the conductive portion 22 of the electrode component 2. Among them, the configuration of the receiving groove 301 is not limited, and it can be flexibly designed and constructed.

[0282] With such a configuration, a receiving groove 301 can be defined, and at least a portion of the conductive portion 22 of the electrode component 2 can be received in the receiving groove 301, which can reduce the space occupied by the conductive portion 22 in the receiving cavity, so that the receiving cavity has a larger space to receive the active material coating portion 21, which is beneficial to increase the volume of the active material coating portion 21, thereby increasing the energy density of the battery cell 10. Moreover, since the receiving groove 301 is open toward the direction of the electrode component 2, the conductive portion 22 can be easily inserted into the receiving groove 301, reducing the difficulty of operation.

[0283] Please refer to Fig.21 The pole body 31 also includes an insulating bracket 6, which is arranged on the side of the clamping structure 32 close to the electrode component 2. The pole body 31 includes a pole inner protrusion 313, which is located in the inner ring area of ​​the insulating bracket 6. The pole inner protrusion 313 protrudes relative to the clamping structure 32 toward the inner side of the first shell wall 13.

[0284] Among them, one side surface of the inner protrusion 313 of the pole close to the electrode component 2 is flush with the one side surface of the insulating bracket 6 close to the electrode component 2, that is, the one side surface of the inner protrusion 313 of the pole close to the electrode component 2 and the one side surface of the insulating bracket 6 close to the electrode component 2 are in the same plane.

[0285] Of course, the side surface of the inner protrusion 313 of the pole close to the electrode component 2 can also be located on the side of the side surface of the insulating bracket 6 close to the electrode component 2 that is away from the electrode component 2, that is, the distance between the inner protrusion 313 of the pole and one end of the active material coating part 21 is greater than the distance between the insulating bracket 6 and one end of the active material coating part 21, so that the inner ring area of ​​the insulating bracket 6 can accommodate at least part of the conductive part 22 of the electrode component 2.

[0286] In the above technical solution, by providing the insulating bracket 6, insulation can be achieved between the active material coating portion 21 of the electrode component 2 and the clamping structure 32, and insulation can also be achieved between the active material coating portion 21 of the electrode component 2 and the first shell wall 13, which is beneficial to improving the reliability of the battery cell 10.

[0287] For example, the length direction of the insulating bracket 6 can extend along the length direction of the first shell wall 13, and the insulating bracket 6 is provided with an escape hole for escaping the pole body 31 so that the conductive portion 22 of the electrode component 2 can be connected to the pole body 31. The insulating bracket 6 can be an integrally formed part, or it can include a plurality of separately formed structural parts.

[0288] Please refer to FIG. 7 . In some embodiments, the clamping structure 32 is formed into a long strip extending along the length direction of the first shell wall 13 . The contour shape of the pole body 31 matches the contour shape of the clamping structure 32 .

[0289] For example, the long strip shape can be a rectangle, an ellipse, a racetrack shape, etc. Among them, the "racetrack shape" is an oblong circle, which can be roughly considered to be composed of a rectangle and two semicircles, and the outline shape of the oblong circle can be roughly considered to be the outline shape of the rectangle after the two short sides of the rectangle are replaced by two arcs.

[0290] As mentioned above, the electrode component 2 is connected to the pole component 3 through the conductive part 22. When the contour shape of the pole body 31 is formed into a long strip that matches the contour shape of the clamping structure 32, the area of ​​the pole body 31 is larger, which is beneficial to increase the connection area between the conductive part 22 and the pole body 31, thereby improving the charging performance.

[0291] Of course, the pole body 31 can also be in other shapes. For example, the pole body 31 is arranged in the center of the clamping structure 32 and has a circular outline. As a result, the connection position of the clamping structure 32 and the pole body 31 is evenly stressed, and it is easy to control the compression amount of the insulating sealing structure 33 to improve the reliability of the sealing cooperation between the two. In addition, the sealing area is relatively small and not easy to fail.

[0292] In some embodiments, the clamping structure 32 is formed into a circular 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 of the clamping structure 32 and the pole body 31 is evenly stressed, and the compression amount of the insulating sealing structure 33 is easily controlled to improve the reliability of the sealing cooperation between the two, and the sealing area is relatively small and not easy to fail.

[0293] Please refer again Figure 4 and Figure 6 The structure of the shell component 1 is not limited. For example, the shell component 1 includes a shell body 11 that forms a receiving cavity, one end of the shell body 11 has an opening 110, and the end of the shell body 11 opposite to the opening 110 is a first shell wall 13. For another example, in combination Figure 4 The housing component 1 includes a housing cover 12 that participates in forming an accommodating cavity, and the housing cover 12 is a first housing wall 13. Therefore, the structural design of the housing component 1 is flexible, and the arrangement position of the pole component 3 is flexible.

[0294] Please refer again Figure 3 , Figure 4 and Figure 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 mounted on the housing component 1, or may be integrally formed in a thinned area of ​​the housing component 1. Thus, by providing the pressure relief device 4, when the pressure in the housing component 1 exceeds a preset value, the pressure may be directionally relieved through the pressure relief device 4, thereby improving the safety and reliability of the battery cell 10.

[0295] For example, the pressure relief device 4 is located on the same side as the pole component 3. Since the pole component 3 is arranged on the first shell wall 13, when the pressure relief device 4 is also arranged on the first shell wall 13, the pressure relief device 4 and the pole component 3 are located on the same side, for example, both are arranged on the top of the battery cell 10, or both are arranged on the bottom of the battery cell 10, or both are arranged on the same side wall of the battery cell 10, etc. In this way, the design of other shell walls other than the first shell wall 13 can be simplified, and the structure and processing of the battery cell 10 can be simplified. Among them, the shell component 1 can be surrounded by a plurality of non-coplanar walls, for example, a rectangular shell component 1 is surrounded by six walls, one of which is the first shell wall 13. The pressure relief device 4 and the pole component 3 are arranged on the same wall, and the two are located on the same side.

[0296] For example, the pressure relief device 4 and the pole component 3 are located on opposite sides. Since the pole component 3 is arranged on the first shell wall 13, when the pressure relief device 4 is arranged on other walls of the shell component 1 except 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 arranged on the second shell wall 14, then the pressure relief device 4 and the pole component 3 are located on opposite sides. Therefore, there is no need to consider that the pressure relief device 4 occupies the space of the first shell wall 13 and reduces the level of the pole component 3, so that the shape and area of ​​the pole component 3 can be flexibly designed as needed. Among them, the shell component 1 can be surrounded by a plurality of non-coplanar walls, for example, a rectangular shell component 1 is surrounded by six walls, one of which is the first shell wall 13, and the pressure relief device 4 is arranged on any other wall except the first shell wall 13, and the pole component 3 is arranged on the first shell wall 13, then the two are located on opposite sides.

[0297] Please refer again Figure 4 and Figure 6 The battery cell 10 further includes an insulating film 5, which can wrap the active material coating portion 21. For example, the insulating film 5 can be made of plastic, rubber, etc.

[0298] By providing the insulating film 5, the insulation reliability between the active material coating part 21 and the shell component 1 can be improved, the corrosion of the shell component 1 caused by the contact between the active material coating part 21 and the shell component 1 can be reduced or prevented, the leakage of electrolyte caused by the corrosion of the shell component 1 can be reduced, and the reliability of the battery cell 10 can be improved.

[0299] According to some embodiments of the present application, the present application provides a battery cell 10 , including a shell component 1 , an electrode component 2 , a pole component 3 , a pressure relief device 4 , an insulating film 5 and an insulating bracket 6 .

[0300] The shell component 1 includes a shell body 11 and a shell cover 12. The shell cover 12 or the wall of the shell body 11 opposite to the shell cover 12 can be a first shell wall 13. The electrode component 2 is arranged in the shell component 1. The pole component 3 is arranged on the first shell wall 13 and connected to the conductive part 22 of the electrode component 2.

[0301] 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 .

[0302] The clamping structure 32 includes a connected main body portion 321 and a clamping member 322, the main 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, the insulating sealing structure 33 is arranged between the flange portion 312 and the clamping member 322, the external 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.

[0303] The insulating sealing structure 33 includes an inner insulator 331 and a sealing ring 332. The inner insulator 331 may include a first inner insulator 3311, or include a first inner insulator 3311 and a second inner insulator 3312.

[0304] For example, Fig.18 As shown, 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 arranged between the clamping member 322 and the flange portion 312. One end of the first inner insulating member 3311 extends to between an end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, and the other end extends to between the second clamping portion 3222 and the flange portion 312. The sealing ring 332 is clamped between an end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0305] For example, Fig.19 As shown, 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 arranged between the clamping member 322 and the pole body 31, and one end of the first inner insulating member 3311 extends to between one end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, and the other end extends to the radial outside of the flange portion 312. The sealing ring 332 is arranged between the second clamping portion 3222 and the flange portion 312, one end of the sealing ring 332 extends to the connection position of the first clamping portion 3221 and the second clamping portion 3222 or the radial outside of the flange portion 312, and the other end extends to between one end of the second clamping portion 3222 away from the first clamping portion 3221 and the pole body 31.

[0306] For example, Fig. 20 As shown, 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 arranged between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2, and the other portion is arranged between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, a portion of the sealing ring 332 is clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312, and a portion is clamped between the second clamping portion 3222 and the side of the flange portion 312 facing the electrode component 2, and 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 pole body 31.

[0307] For example, Fig.21 As shown, 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 arranged between the end of the first clamping portion 3221 away from the second clamping portion 3222 and the pole body 31, a part of the sealing ring 332 is clamped between the first clamping portion 3221 and the radial outer side of the flange portion 312, a part is clamped between the first clamping portion 3221 and the side of the flange portion 312 away from the electrode component 2, and the other part is clamped between the second clamping portion 3222 and the side of the flange portion 312 toward the electrode component 2, and 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 pole body 31.

[0308] According to some embodiments of the present application, the present application further provides a battery device 100, which includes the battery cell 10 described in the above scheme. It is worth noting that the battery device 100 according to the embodiment of the present application may include a box body 1012, or may not include the box body 1012. Therefore, since the reliability of the battery cell 10 according to the embodiment of the present application is improved, it is beneficial to improve the performance of the battery device 100.

[0309] Exemplarily, the battery device 100 may further include a busbar component, and the battery cells 10 are multiple and at least two are electrically connected through the busbar component. Thus, multiple battery cells 10 can be connected in series and / or in parallel. For example, when multiple battery cells 10 are connected in series, the pole component 3 of the negative electrode of one battery cell 10 is connected to the pole component 3 of the positive electrode of the next battery cell 10 through a busbar component, and at the same time, the pole component 3 of the positive electrode of the battery cell 10 is connected to the pole component 3 of the negative electrode of the previous battery cell 10 through another busbar component.

[0310] According to some embodiments of the present application, the present application further provides an electric device including the battery device 100 described in the above solution, and the battery device 100 is used to provide electric energy to the electric device. The electric device can be any of the above-mentioned devices or systems using the battery device 100. Since the performance of the battery device 100 is improved, it is beneficial to improve the working performance of the electric device.

[0311] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: A shell component including a first shell wall; An electrode component, housed in the housing component; A pole component is arranged on the first shell wall and includes a pole body, a clamping structure, and an insulating sealing structure; the pole body is connected to the electrode component; the clamping structure surrounds the pole body and includes a body part and a clamping member, the body part is arranged around the outer periphery of the clamping member and is connected to the first shell wall, the clamping member is arranged on the body part, the clamping member includes a first clamping member and a second clamping member, the first clamping member and the second clamping member clamp the pole body through the insulating sealing structure; The first clamping portion and the main body have different thicknesses, the second clamping portion and the main body have different thicknesses, and the thickness of the thickest one among the first clamping portion, the second clamping portion and the main body is greater than the thickness of the first shell wall.

2. The battery cell according to claim 1, characterized in that: The first clamping portion is connected to a side of the second clamping portion away from the electrode component, and the insulating sealing structure is sandwiched between the first clamping portion and the pole body, and between the second clamping portion and the pole body.

3. The battery cell according to claim 2, characterized in that: The main body, the first clamping portion and the second clamping portion are integrally formed.

4. The battery cell according to claim 2, characterized in that: The main body and the first shell wall are integrally formed; or, the main body and the first shell wall are connected by welding.

5. The battery cell according to claim 4, characterized in that: The main body, the first clamping portion and the second clamping portion are integrally formed.

6. The battery cell according to claim 2, characterized in that: The thickness of the main body is greater than the thickness of the first shell wall.

7. The battery cell according to claim 6, characterized in that: The thickness of the second clamping portion is smaller than the thickness of the main body portion.

8. The battery cell according to claim 7, characterized in that: The thickness of the second clamping portion is greater than half of the thickness of the main body portion.

9. The battery cell according to claim 6, characterized in that: The thickness of the first clamping portion is smaller than the thickness of the main body portion, and / or the thickness of the first clamping portion is smaller than the thickness of the second clamping portion.

10. The battery cell according to claim 7, characterized in that: The first clamping portion and the second clamping portion are stamping parts.

11. The battery cell according to claim 6, characterized in that: The thickness of the second clamping portion is greater than the thickness of the main body portion.

12. The battery cell according to claim 11, characterized in that: The thickness of the first clamping portion is greater than the thickness of the main body portion, and / or the thickness of the first clamping portion is less than the thickness of the second clamping portion.

13. The battery cell according to claim 11, characterized in that: The first clamping portion and the main body portion are stamped parts.

14. The battery cell according to claim 6, characterized in that: The thickness of the second clamping portion is greater than the thickness of the first shell wall.

15. The battery cell according to claim 6, characterized in that: The thickness of the first clamping portion is greater than the thickness of the first shell wall.

16. The battery cell according to claim 6, characterized in that: The thickness of the structure with smaller thickness between the main body part and the second clamping part is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm, or equal to 5 mm.

17. The battery cell according to claim 2, characterized in that: The thickness of the main body is smaller than the thickness of the first shell wall.

18. The battery cell according to claim 17, characterized in that: The thickness of the second clamping portion is greater than the thickness of the main body portion.

19. The battery cell according to claim 18, characterized in that: The thickness of the main body portion is greater than half of the thickness of the second clamping portion.

20. The battery cell according to claim 17, characterized in that: The thickness of the second clamping portion is smaller than the thickness of the main body portion.

21. The battery cell according to claim 17, characterized in that: The thickness of the first clamping portion is greater than the thickness of the main body portion.

22. The battery cell according to claim 17, characterized in that: The thickness of the second clamping portion is greater than the thickness of the first shell wall.

23. The battery cell according to claim 17, characterized in that: The thickness of the first clamping portion is greater than the thickness of the first shell wall.

24. The battery cell according to claim 17, characterized in that: The thickness of the structure with smaller thickness between the main body part and the second clamping part is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm, or equal to 5 mm.

25. The battery cell according to claim 2, characterized in that: The pole component further includes an outer insulating member, wherein the outer insulating member at least partially covers a side of the first clamping portion facing away from the insulating sealing structure.

26. The battery cell according to claim 25, characterized in that: A side surface of the outer insulating member facing away from the first clamping portion is smoothly transitionally connected to an end surface of the pole body facing away from the electrode component.

27. The battery cell according to claim 25, characterized in that: The peripheral edge of the end surface of the pole body facing away from the electrode component has a step; The outer insulating member at least partially extends to the step, or the outer insulating member at least partially extends to one side of the step to be flush with the step surface of the step.

28. The battery cell according to claim 27, characterized in that: The step is an annular structure, and the outer insulating member is disposed around the first clamping portion.

29. The battery cell according to claim 25, characterized in that: The outer insulating member is connected to the insulating sealing structure.

30. The battery cell according to claim 25, characterized in that The first clamping portion comprises a first extension section, a second extension section and an arc extension section, the first extension section is arranged around the circumference of the pole body and connected to the second clamping portion, the second extension section is located on a side of the pole body away from the electrode component and is arranged opposite to the second clamping portion, and the first extension section and the second extension section are connected through the arc extension section; The outer insulating member includes a first insulating segment, a second insulating segment and an arc insulating segment, the first insulating segment covers a side of the first extension segment away from the pole body, the second insulating segment covers a side of the second extension segment away from the pole body, and the first insulating segment and the second insulating segment are connected via the arc insulating segment.

31. The battery cell according to claim 30, characterized in that: A side surface of the second insulating section facing away from the second extending section is in the same plane as an end surface of the pole body facing away from the electrode component; or the pole body partially protrudes from a side surface of the second insulating section facing away from the second extending section.

32. The battery cell according to any one of claims 2 to 31, characterized in that: The pole body has a flange portion on its circumferential side. 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, characterized in that: The insulating sealing structure comprises a first inner insulating member and a sealing ring, wherein the first inner insulating member is arranged between the first clamping portion and the flange portion, and the sealing ring is arranged between the second clamping portion and the flange portion; Alternatively, the insulating sealing structure comprises an integrally arranged sealing ring, and the sealing ring is located 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, wherein the first inner insulating member is arranged between the first clamping portion and the flange portion, the sealing ring is arranged between the connecting position of the first clamping portion and the second clamping portion and the flange portion, and the second inner insulating member is arranged between the position of the second clamping portion away from the first clamping portion and the flange portion.

34. The battery cell according to any one of claims 1 to 31, characterized in that: The clamping structure is formed into a long strip extending along the length direction of the first shell wall; The contour shape of the pole body matches the contour shape of the clamping structure, or the pole body is arranged at the center of the clamping structure and has a circular contour.

35. The battery cell according to any one of claims 1 to 31, characterized in that: The clamping structure is formed in a circular ring shape, and the contour shape of the pole body matches the contour shape of the clamping structure.

36. The battery cell according to any one of claims 1 to 31, characterized in that: The shell component comprises a shell body having an opening at at least one end, and a shell cover arranged at the opening; Wherein, the wall of the shell body opposite to 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 to 31, characterized in that: It also includes a pressure relief device, which is arranged on the shell component and is located on the same side or the opposite side as the pole component.

38. A battery device, characterized in that: Comprising a battery cell according to any one of claims 1-37.

39. An electrical device, characterized in that: Comprising a battery device according to claim 38.

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