Battery cell, battery apparatus and electrical apparatus

Abstract

A battery cell (20), a battery apparatus and an electrical apparatus. The battery cell comprises: a casing component (21), comprising a first wall which is provided with mounting holes; an electrode component (22), accommodated in the casing component; and post components (23), which are mounted at the mounting holes. Each post component comprises a post body (231), an adapter structure and an insulating sealing structure (233), the adapter structure being arranged around the circumference of the post body and connected to the first wall, the insulating sealing structure being fitted between the post body and the adapter structure, and the adapter structure comprising a connection arm (2321), a cantilever (2322) and a transverse arm (2323); each post body comprises a main body portion (2311) and a skirt portion (2312), the skirt portion being arranged around the circumference of the main body portion and being bent in a direction towards the cantilever; and in the thickness direction of the first wall, each cantilever and a transverse arm clamp a skirt portion by means of an insulating sealing structure.

Description

Battery cells, battery packs and electrical devices Technical Field

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

[0002] A battery pack typically consists of a housing and multiple battery cells housed within it. The battery cell, as the core component of the battery pack, has stringent requirements regarding both safety and lifespan. To ensure stability within the battery cell, its casing needs to maintain a high degree of airtightness with the external environment. Therefore, further improving the airtightness between the battery cell's internal structure and its external environment has become one of the problems that needs to be solved.

[0003] Summary of the Invention

[0004] This application provides a battery cell, a battery device, and an electrical device, which can effectively improve the reliability of the battery cell and the battery device.

[0005] In a first aspect, embodiments of this application provide a battery cell, comprising: a housing component including a first wall having a mounting hole; an electrode component housed within the housing component; and a terminal component mounted at the mounting hole, comprising a terminal body, a connecting structure, and an insulating sealing structure. The terminal body is connected to the electrode component, the connecting structure is circumferentially arranged around the terminal body and connected to the first wall, and the insulating sealing structure is insulatingly and sealingly fitted between the terminal body and the connecting structure. The connecting structure includes a connecting arm and cantilevered arms and cross arms connected to both ends of the connecting arm, with the cantilevered arms being farther from the first wall than the cross arms. The terminal body includes a connected main body and a skirt portion, the skirt portion being circumferentially arranged around the main body and bent towards the cantilevered arms. Along the thickness direction of the first wall, the cantilevered arms and cross arms clamp the skirt portion via the insulating sealing structure.

[0006] In the above technical solution, the cantilever and crossarm of the adapter structure can be clamped onto the skirt of the electrode body by the insulating and sealing structure. Simultaneously, because the skirt bends towards the cantilever, it further compresses the insulating and sealing structure, making the connection between the insulating and sealing structure and the electrode body and adapter structure tighter. This improves the insulation and sealing performance of the adapter structure and the skirt, thus enhancing the reliability of the battery cell. Because the skirt bends towards the cantilever, when the skirt is under stress, the bending structure resists deformation and distributes the force to different parts, giving the skirt high strength and making it less prone to deformation. This improves the reliability of the structure formed by the electrode body and the adapter structure, reduces the probability of the skirt detaching from the adapter structure due to deformation, and further improves the stability of the insulating and sealing structure between the electrode body and the adapter structure. This also reduces the risk of insulation and sealing failure, and similarly improves the reliability of the battery cell.

[0007] In some embodiments of this application, the skirt portion includes a first section and a second section, the first section being connected to the main body portion, and the second section being connected to the end of the first section away from the main body portion and bent relative to the first section toward the cantilever.

[0008] In the above technical solution, the skirt portion forms a bent structure from a certain position. This allows the second section to form a reinforcing structure near the first section and provides a counter-bending moment in the direction away from the first wall, thereby enhancing the overall resistance of the skirt portion to bending deformation. The skirt portion with this structure has a simple bending method and good manufacturability.

[0009] In some embodiments of this application, at least two bends are formed on the skirt edge.

[0010] In the above technical solution, the above structure can increase the number of bending positions of the skirt, further improve the strength of the skirt, and enhance the bending and torsional resistance of the skirt. This can further reduce the probability of the skirt bending and deforming when the electrode body is subjected to a force away from the first wall, thus preventing the electrode body from detaching from the transfer structure. This can further improve the stability of the structure formed by the electrode body and the transfer structure, improve the reliability of the insulation and sealing structure, and thus improve the reliability of the battery cell.

[0011] In some embodiments of this application, the skirt portion includes a first section, a second section, and a third section. The first section connects to the main body portion, the second section connects the first section and the third section and bends relative to the first section toward the cantilever, and the third section bends relative to the second section toward the first wall.

[0012] In the above technical solution, the skirt portion with the above structure can form two bending positions, that is, two bending angles, which enables the skirt portion to have high strength and high resistance to bending and torsion. At the same time, it is also beneficial to keep the structure of the skirt portion from being too complicated, thereby improving the manufacturability of the skirt portion, reducing manufacturing difficulty, and thus reducing manufacturing costs.

[0013] In some embodiments of this application, the first section is perpendicular to the main body. In this technical solution, the first section being perpendicular to the main body can enhance strength, improve the connection strength and rigidity between the first section and the main body, and when the electrode body is subjected to a force away from the first wall, the above structure can reduce the probability of the first section bending and deforming relative to the main body, improve the reliability of the electrode body, and thus reduce the probability of sealing failure at the location of the insulation sealing structure, thereby improving the reliability of the battery cell.

[0014] In some embodiments of this application, the thickness of the second segment is H1 along the thickness direction of the first wall, and the length of the second segment is L1 along the thickness direction of the connecting arm, wherein H1 and L1 satisfy the following formula: y = -(P·L1) 4 ) / 8E(b·H1 3 / 12)

[0015] Where y is the deflection of the second section, which should be less than 25% of the compression of the insulation and sealing structure, in mm;

[0016] P represents the maximum rebound force of the insulating and sealed structure after compression, expressed in N.

[0017] E is the elastic modulus of the second section, in GPa.

[0018] b represents the circumference of the second section in the circumferential direction of the pole body, in mm.

[0019] In the above technical solution, the thickness and length of the second section can be calculated by using the above formula, so that the bending position of the skirt has high strength and rigidity, which can reduce the probability of large deformation of the skirt when the pole body is under stress, and thus reduce the probability of the pole body detaching from the cantilever. This can improve the reliability of the insulation and sealing structure between the transfer structure and the pole body, reduce the risk of insulation and sealing failure, and improve the reliability of the battery cell.

[0020] In some embodiments of this application, the included angle between the first segment and the second segment is θ1, where 90 degrees ≤ θ1 < 180 degrees. In this technical solution, by setting the included angle θ1 between the first segment and the second segment within the aforementioned range, a suitable included angle value can be flexibly selected according to the size of the pole body, adjusting the structural strength between the first segment and the second segment to meet the stiffness and strength requirements of the skirt portion of pole bodies of different sizes.

[0021] In some embodiments of this application, 125 degrees ≤ θ1 ≤ 145 degrees. In this technical solution, by further narrowing the range of the included angle θ1, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the first and second sections of the electrode body in most sizes. This reduces the difficulty of selecting the included angle value, simplifies the manufacturing process, and thus helps to reduce the production cost of the battery cell.

[0022] In some embodiments of this application, the included angle between the second segment and the third segment is θ2, where 90 degrees ≤ θ2 < 180 degrees. In this technical solution, by setting the included angle θ2 between the second segment and the third segment within the aforementioned range, a suitable included angle value can be flexibly selected according to the size of the pole body, adjusting the structural strength between the second segment and the third segment to meet the stiffness and strength requirements of the skirt portion of pole bodies of different sizes.

[0023] In some embodiments of this application, 125 degrees ≤ θ2 ≤ 145 degrees. In this technical solution, by further narrowing the range of the included angle θ2, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the second and third sections of the electrode body in most sizes. This reduces the difficulty of selecting the included angle value, simplifies the manufacturing process, and thus helps to reduce the production cost of the battery cell.

[0024] In some embodiments of this application, the first wall has an outer wall surface away from the electrode component. Along the thickness direction of the first wall, the connecting arm forms a first projection on the plane where the outer wall surface is located, and the cantilever forms a second projection on the plane where the outer wall surface is located. In the thickness direction of the connecting arm, the size of the first projection is smaller than the size of the second projection.

[0025] In the above technical solution, the connecting arm can be a vertical arm perpendicular to or approximately perpendicular to the first wall. On the one hand, this reduces the compressive force arm of the transition structure on the insulation and sealing structure, enhances the compressive effect of the cantilever on the portion of the insulation and sealing structure located between the skirt and the horizontal arm, strengthens the insulation and sealing effect, and improves the insulation and sealing reliability of the insulation and sealing structure between the skirt and the horizontal arm, thereby improving the overall reliability of the battery cell. On the other hand, the above structure also makes the transition structure more compact, thus making the overall structure of the terminal post component more compact. As a result, the terminal post body can have a larger exposed surface, which is beneficial to increasing the current-carrying area of ​​the terminal post body and improving the current-carrying capacity of the terminal post body.

[0026] In some embodiments of this application, the connecting arm is perpendicular to the first wall. In this technical solution, by making the connecting arm perpendicular to the first wall, the compression arm of the adapter structure on the insulating sealing structure can be smaller, further enhancing the insulation and sealing effect of the insulating sealing structure and improving the reliability of the battery cell. Secondly, adopting the above structure also makes the adapter structure more compact, thereby further reducing the size of the adapter structure. Under the premise of the same size electrode component, the electrode body has a larger surface area, further improving the current carrying capacity of the electrode body.

[0027] In some embodiments of this application, the cantilever includes a root and a beam, the beam being connected to the connecting arm via a rounded transition at the root; the insulating sealing structure includes a seal, the seal being at least partially insulating and sealingly fitted between the crossarm and the skirt.

[0028] In the above technical solution, by configuring the cantilever with the aforementioned structure, the beam is connected to the connecting arm via a rounded transition at the root, resulting in a smoother and more rounded connection between the cantilever and the connecting arm, thus reducing the likelihood of stress concentration. Furthermore, by including a sealant in the insulation and sealing structure, the sealant effectively seals the area between the crossarm and the skirt, reducing the risk of seal failure at the location of the terminal post and improving the reliability of the battery cell.

[0029] In some embodiments of this application, the beam portion is inclined or bent relative to the root portion toward the first wall.

[0030] In the above technical solution, the above structure can improve the overall strength of the cantilever. Moreover, the tilting or bending direction of the cantilever is opposite to the direction in which the pole body is forced to detach from the transfer structure, and also opposite to the bending direction of the skirt. This helps to increase the difficulty of bending the skirt towards the side closer to the first wall and reduce the risk of the connecting arm bending away from the pole body. This can reduce the probability of the pole body being forced to detach from the transfer structure, improve the overall reliability of the pole component, and further improve the reliability of the insulation and sealing structure, thereby improving the reliability of the battery cell.

[0031] In some embodiments of this application, the included angle between the root and the beam is θ3, where 90 degrees ≤ θ3 < 180 degrees. In this technical solution, by setting the included angle θ3 between the root and the beam within the aforementioned range, a suitable included angle value can be flexibly selected according to the size of the pole body, adjusting the structural strength between the root and the beam to meet the stiffness and strength requirements of cantilever beams of different sizes.

[0032] In some embodiments of this application, 125 degrees ≤ θ3 ≤ 145 degrees. By further narrowing the range of the included angle θ3, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the root and beam of the electrode body in most sizes. This reduces the difficulty of selecting the included angle value, simplifies the manufacturing process, and thus helps to reduce the production cost of the battery cell.

[0033] In some embodiments of this application, the cantilever includes a root and a beam, the root being arc-shaped and connecting the connecting arm and the beam; an insulating sealing structure seal is provided, which is at least partially insulating and sealingly fitted between the cross arm and the skirt.

[0034] In the above technical solution, the root is arc-shaped, resulting in a smoother transition between the cantilever and connecting arm, reducing the risk of stress concentration and improving the reliability of the cantilever, which in turn improves the reliability of the transition structure, thereby enhancing the overall reliability of the terminal post assembly. Furthermore, the arc-shaped root has a larger radius, reducing molding difficulty regardless of whether casting, bending, or riveting is used, thus improving product yield and reducing manufacturing costs. By incorporating a sealant into the insulation and sealing structure, which provides a seal between the cross arm and the skirt, the problem of seal failure at the terminal post assembly location is reduced, improving the reliability of the individual battery cells.

[0035] In some embodiments of this application, the beam is inclined or bent relative to the root towards the first wall, and the included angle between the beam and the connecting arm is θ4, where θ4 < 90 degrees.

[0036] In the above technical solution, the above structure can improve the overall strength of the cantilever. Moreover, the tilting or bending direction of the cantilever is opposite to the direction in which the pole body is forced to detach from the transfer structure, and also opposite to the bending direction of the skirt. This helps to increase the difficulty of bending the skirt towards the side closer to the first wall and reduce the risk of the connecting arm bending away from the pole body. This can reduce the probability of the pole body being forced to detach from the transfer structure, improve the reliability of the pole component, and further improve the reliability of the insulation and sealing structure, thereby improving the reliability of the battery cell.

[0037] In some embodiments of this application, 45 degrees ≤ θ4 < 90 degrees. In this technical solution, by further narrowing the range of the included angle θ4, it is beneficial to select a more suitable included angle value more accurately to meet the included angle between the beam and the connecting arm of the pole body in most sizes, so as to meet the strength and stiffness requirements of the cantilever. This reduces the difficulty of selecting the included angle value, simplifies the manufacturing process, and thus helps to reduce the production cost of the battery cell.

[0038] In some embodiments of this application, the cantilever includes a root, a beam, and a bend. The beam is connected to the connecting arm via an arc transition at the root. The bend is located at the end of the beam away from the root and bends towards the first wall. The insulating sealing structure includes a seal, which is at least partially insulating and sealingly fitted between the cross arm and the skirt.

[0039] In the above technical solution, on the one hand, the cantilever can be connected to the connecting arm with a rounded transition, resulting in a smoother connection between the cantilever and the connecting arm, reducing the likelihood of stress concentration. On the other hand, the cantilever as a whole can form a bent structure, which can improve its strength and rigidity, reducing the probability of large deformation of the cantilever when the electrode body is subjected to forces away from the first wall. This reduces the risk of the electrode body detaching from the transition structure, improves the reliability of the insulation and sealing structure, and thus improves the reliability of the battery cell. By setting the insulation and sealing structure to include a sealing element, which can seal between the cross arm and the skirt, the problem of sealing failure at the electrode component location can be reduced, thereby improving the reliability of the battery cell.

[0040] In some embodiments of this application, the beam is inclined or bent relative to the root towards the first wall, and the included angle between the beam and the connecting arm is θ5, wherein 85 degrees ≤ θ5 ≤ 95 degrees. In this technical solution, by setting the included angle θ5 between the beam and the connecting arm within the aforementioned range, a suitable included angle value can be flexibly selected according to the size of the pole body, adjusting the structural strength and stiffness of the structure formed by the beam and the connecting arm to meet the stiffness and strength requirements of transition structures of different sizes.

[0041] In some embodiments of this application, the included angle between the beam and the bend is θ6, where 85 degrees ≤ θ6 ≤ 95 degrees. In this technical solution, by setting the included angle θ6 between the beam and the bend within the aforementioned range, a suitable included angle value can be flexibly selected according to the size of the pole body, adjusting the structural strength and stiffness of the structure formed by the beam and the bend to meet the stiffness and strength requirements of cantilever beams of different sizes.

[0042] In some embodiments of this application, the first wall has an outer wall surface away from the electrode component, and along the thickness direction of the first wall, the projection of the root onto the plane of the outer wall surface and the projection of the seal onto the plane of the outer wall surface at least partially overlap. This structure increases the compression surface of the cantilever on the seal, thereby allowing the seal to have a greater compression amount between the cross arm and the skirt, enhancing the sealing performance of the seal, improving the sealing reliability between the adapter structure and the electrode body, thus improving the reliability of the electrode component, and ultimately improving the reliability of the battery cell.

[0043] In some embodiments of this application, the side of the skirt facing away from the cantilever forms a gap with the insulating sealing structure and the transition structure. Using this structure, the gap provides space for at least a portion of the insulating sealing structure to expand and deform, releasing gas and other contaminants inside the insulating sealing structure. This reduces the risk that at least a portion of the insulating sealing structure may not release gas or expand in time during compression, lowers the risk of damage to the transition structure due to compression, improves the reliability of the terminal post components, and consequently improves the reliability of the battery cell.

[0044] In some embodiments of this application, the adapter structure is an integrally molded part and includes a pre-formed part and a riveting part. The pre-formed part is connected to the first wall and includes a cross arm. The riveting part is connected to the pre-formed part and includes a connecting arm and a cantilever. And / or, the adapter structure and the housing component are integrally formed.

[0045] In the above technical solution, the adapter structure is a one-piece molded component, and the connecting arm and cantilever are formed by riveting. This results in good overall consistency of the adapter structure and fewer connection gaps, enhancing the connection strength between the adapter structure and the terminal body, reducing the risk of loosening. Furthermore, the riveting and tightening method creates a good sealing effect, further improving the sealing performance between the adapter structure and the terminal body, which is beneficial to improving the reliability of the adapter structure and thus the reliability of the terminal component. The adapter structure and the housing component are integrated, ensuring high consistency in the structure formed by the adapter structure and the housing component, further reducing connection gaps, enhancing the sealing effect, and improving the reliability of the battery cell.

[0046] In some embodiments of this application, the cross arm includes an outer annular surface facing the skirt portion, and the insulating sealing structure includes a seal, the seal including a first sealing portion, the first sealing portion being insulating and sealingly fitted between the outer annular surface and the skirt portion. Using the above structure, the first sealing portion can form a larger sealing surface between the cross arm and the skirt portion, which can provide better sealing performance, improve the reliability of the terminal post component, and thus improve the reliability of the battery cell.

[0047] In some embodiments of this application, the cross arm includes an inner annular surface surrounding the pole body, and the seal includes a second sealing portion that is insulated and sealably fitted between the inner annular surface and the pole body, and connects to the first sealing portion.

[0048] In the above technical solution, the above structure can make the combination of the seal and the cross arm more compact, improve the connection reliability of the seal and the cross arm, and also increase the sealing surface of the seal and the cross arm, thereby further improving the sealing performance, further improving the reliability of the terminal component, and improving the reliability of the battery cell.

[0049] In some embodiments of this application, the insulating and sealing structure includes a seal and a first insulating member. The cross arm and skirt are insulated and sealed together by the seal, and the connecting arm and cantilever are insulated and connected to the electrode body by the first insulating member. In this technical solution, the first insulating member can provide insulation around the electrode body, reducing the risk of short circuits or other electrical safety accidents. Moreover, the first insulating member and the seal can simultaneously provide a sealing function. The first insulating member serves as the first line of defense, and the seal serves as the second line of defense, thus providing dual protection. This reduces the probability of electrolyte leakage from the inside of the casing components and effectively resists the intrusion of moisture and dust, thereby improving the reliability of the battery cell.

[0050] In some embodiments of this application, the first insulating element is injection molded between the connecting arm, the cantilever, and the pole body.

[0051] In the above technical solution, the first insulating component, as an injection-molded part, can fill the tiny gaps between the connecting arm, cantilever, and terminal body, providing a more comprehensive sealing coverage, enhancing the sealing effect, and also facilitating adaptation to irregular transition structure shapes, thus possessing better flexibility, thereby improving manufacturability and product yield. Secondly, the first insulating component, through injection molding, can also more tightly wrap the connecting arm, cantilever, and terminal body together, making the components bonded together, which can improve the overall integrity of the terminal component. When the battery cell is subjected to external impact or vibration, this tight structure can reduce the shaking and displacement of internal components, maintain the structural stability of the terminal component, and help improve the reliability of the battery cell.

[0052] In some embodiments of this application, the seal and the first insulator are integrally formed. This structure reduces assembly steps and simplifies the assembly process. For mass production of battery cells, it improves assembly efficiency and reduces raw material waste. Since it eliminates the need to manufacture the seal and the first insulator separately and then connect or assemble them, it reduces scrap materials and unnecessary processing steps, lowering manufacturing costs. The integral forming of the seal and the first insulator also helps eliminate potential micro-gaps or loose connections between them, reducing the risk of sealing failures and electrolyte leakage, thus improving the reliability of the battery cell.

[0053] In some embodiments of this application, the insulating sealing structure includes a second insulating element that covers the outer peripheral surfaces of the connecting arm and the cantilever. This structure provides circumferential insulation protection to the outer side of the electrode body, reducing the risk of electrical safety accidents such as short circuits, and stabilizing the surrounding electric field distribution, thus reducing the probability of damage to the battery cell due to uneven electric field. Furthermore, the second insulating element forms a protective layer around the connecting arm and the cantilever, providing cushioning and vibration damping, thereby reducing the impact on the electrode body and lowering the probability of damage, ultimately improving the reliability of the battery cell.

[0054] In some embodiments of this application, the second insulating element, the first insulating element, and the sealing element are integrally molded.

[0055] In the above technical solution, the aforementioned structure reduces assembly steps and simplifies the assembly process. For large-scale production of battery cells, this improves assembly efficiency and reduces raw material waste. Since it eliminates the need to separately manufacture the sealing component, the first insulating component, and the second insulating component before connecting or assembling them, it reduces scrap materials and unnecessary processing steps, lowering manufacturing costs. The integral molding of the sealing component, the first insulating component, and the second insulating component also helps eliminate potential micro-gaps or loose connections between them, reducing the risk of sealing failures and electrolyte leakage, thus improving the reliability of the battery cells.

[0056] In some embodiments of this application, the insulating sealing structure includes a seal and a third insulating member. The cross arm and the skirt are insulated and sealed together by the seal. The third insulating member is located on the side of the adapter structure near the electrode component and is sealed together with the seal.

[0057] In the above technical solution, the third insulating component provides an effective insulation barrier on the side of the transition structure near the electrode components, isolating the electrode components from the first wall and the transition structure, reducing the risk of short circuits, and allowing current to flow along a predetermined path, thereby improving the stability and reliability of the battery cell. The third insulating component also acts as a barrier, preventing electrolyte from flowing to the terminal components, reducing the risk of electrolyte leakage, and preventing external moisture, dust, and other impurities from entering the casing components, causing internal short circuits and corrosion problems in the battery cell. In other words, the third insulating component helps maintain a clean environment inside the casing components, ensuring that the chemical reactions inside the battery cell can function normally. Furthermore, the third insulating component acts as a buffer between the first wall and the electrode components, reducing the probability of impact between the first wall and the electrode components that could damage the electrode components, thus improving the reliability of the battery cell.

[0058] In some embodiments of this application, the third insulating element and the sealing element are integrally molded parts.

[0059] In the above technical solution, the aforementioned structure reduces assembly steps and simplifies the assembly process. For large-scale production of battery cells, this improves assembly efficiency and reduces raw material waste. Since it eliminates the need to separately manufacture the third insulating component and seal before connecting or assembling, it reduces scrap materials and unnecessary processing steps, lowering manufacturing costs. The integrated molding of the third insulating component and seal also helps eliminate potential micro-gaps or loose connections between them, reducing the risk of sealing failures and electrolyte leakage, thus improving the reliability of the battery cells.

[0060] In some embodiments of this application, the housing component includes a housing and a cover, the housing having an opening and the cover closing the opening; the first wall is the cover, or a wall opposite the housing and the cover. In the above technical solutions, by providing the first wall on the cover or the wall opposite the housing and the cover, more options are available for the placement of the terminal post component, increasing the design flexibility of the battery cell to meet different usage requirements.

[0061] Secondly, embodiments of this application provide a battery device, including any of the battery cells described above.

[0062] In the above technical solution, since the battery cell has high reliability, the reliability of the battery device using the battery cell can be improved, and the battery device can have better performance.

[0063] Thirdly, embodiments of this application provide an electrical device, including a battery cell as described above, or a battery device as described above, wherein the battery cell or battery device is used to store or provide electrical energy.

[0064] In the above technical solution, since the battery cell or battery device has high reliability, the reliability of the electrical device using the battery cell or battery device can be improved, and the electrical device can have better performance. Attached Figure Description

[0065] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0066] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0067] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0068] Figure 3 is a schematic diagram of the internal structure of a battery cell provided in some embodiments of this application;

[0069] Figure 4 is a schematic diagram of the structure of the pole post component provided in some embodiments of this application;

[0070] Figure 5 is a schematic diagram of the structure of the pole body provided in some embodiments of this application;

[0071] Figure 6 is a partial structural schematic diagram of the pole body provided in another embodiment of this application;

[0072] Figure 7 is a partial enlarged schematic diagram of the pole post component provided in some embodiments of this application;

[0073] Figure 8 is a partial enlarged schematic diagram of the pole post component provided in some embodiments of this application;

[0074] Figure 9 is a three-dimensional structural diagram of a battery cell provided in some embodiments of this application;

[0075] Figure 10 is a partial structural schematic diagram of the adapter structure provided in some embodiments of this application;

[0076] Figure 11 is a partial enlarged schematic diagram of the pole post component provided in another embodiment of this application;

[0077] Figure 12 is a partial structural schematic diagram of the adapter structure provided in another embodiment of this application;

[0078] Figure 13 is a partial enlarged structural schematic diagram of the pole post component provided in another embodiment of this application;

[0079] Figure 14 is a partial structural schematic diagram of the adapter structure provided in another embodiment of this application;

[0080] Figure 15 is a schematic diagram of the adapter structure before riveting provided in some embodiments of this application;

[0081] Figure 16 is an exploded view of the pole post component before assembly in some embodiments of this application;

[0082] Figure 17 is a partial structural schematic diagram of the pole post component provided in some other embodiments of this application;

[0083] Figure 18 is a partial structural schematic diagram of the pole post component provided in some other embodiments of this application;

[0084] Figure 19 is a schematic diagram of the assembly structure of a battery cell provided in some embodiments of this application;

[0085] Figure 20 is a schematic diagram of the assembly structure of a battery cell provided in some embodiments of this application.

[0086] icon:

[0087] 1000. Electrical appliances;

[0088] 100. Battery device;

[0089] 10. Box body;

[0090] 11. First box body; 12. Second box body;

[0091] 20. Battery cell;

[0092] 21. Housing components;

[0093] 201, First wall; 201a, Mounting hole; 201b, Outer wall surface;

[0094] 211. Shell; 212. Cover;

[0095] 22. Electrode components;

[0096] 221. Polar ear;

[0097] 23. Pole post components;

[0098] 231. Pole body;

[0099] 2311, Main body; 2311a, Exposed surface;

[0100] 2312. Skirt hem;

[0101] 2301, Section 1; 2302, Section 2; 2303, Section 3;

[0102] 232. Adapter structure;

[0103] 2321, Connecting arm; 2321a, Glue injection hole;

[0104] 2322, cantilever; 23221, root; 23222, beam; 23223, bend;

[0105] 2323, transverse arm; 2323a, outer annular surface; 2323b, inner annular surface;

[0106] 2304. Pre-forming part; 2305. Riveting forming part;

[0107] 233. Insulating and sealing structure;

[0108] 2331, Seal; 23311, First sealing part; 23312, Second sealing part;

[0109] 2332. First insulating component; 2333. Second insulating component; 2334. Third insulating component;

[0110] 234. Clearance; 235. Compression arm;

[0111] 200, Controller; 300, Motor; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0112] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0113] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0114] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0115] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0116] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0117] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0118] In this application, "multiple" means two or more (including two).

[0119] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0120] The battery apparatus mentioned in the embodiments of this application can refer to an assembly of one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0121] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0122] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing. As an example, the individual battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the individual battery cell assembly may be housed within the housing by directly securing multiple individual battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0123] A single battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0124] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode components can be of a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0125] A battery pack typically consists of a casing and multiple battery cells housed within it. In recent years, with the rapid development of new energy vehicles, battery packs have become indispensable power sources for electric vehicles, providing them with power. As a core component of new energy vehicles, the battery pack has high requirements in terms of both safety and cycle life. Similarly, the battery cell, as a core component of the battery pack, also has high requirements in terms of both safety and lifespan. To ensure the stability of the battery cell, its casing needs to maintain a high degree of sealing against the external environment. Therefore, further improving the sealing between the battery cell's internal structure and the external environment has become one of the problems that needs to be solved.

[0126] In a typical battery cell, terminals are mounted on the outer casing. These terminals pass through the casing and are electrically connected to the electrode components inside. To ensure the casing is sealed from the external environment, the terminals need to be sealed to the casing via a sealing component. However, in typical battery cells, the sealing component between the terminals and the casing is prone to seal failure, mainly due to two reasons: first, the compression of the sealing component between the terminals and the casing may be insufficient to provide a proper seal; second, the battery cell needs to be connected to other electrical components or battery cells, making the terminals susceptible to forces. For example, a common scenario is that the terminals are subjected to pull-out forces away from them. When these pull-out forces are large, they can easily damage and deform the terminals or casing, leading to seal failure and affecting the reliability of the battery cell.

[0127] Based on the above considerations, in order to address the problem of easy sealing failure between the terminal post and the casing, which affects the sealing performance of the battery cell casing and the external environment, and thus the reliability of the battery cell, the applicant has designed a battery cell, including: a casing component, an electrode component, and a terminal post component. The casing component includes a first wall with a mounting hole; the electrode component is housed within the casing component. The terminal post component is mounted at the mounting hole and includes a terminal post body, a connecting structure, and an insulating sealing structure. The terminal post body connects to the electrode component, the connecting structure is circumferentially arranged around the terminal post body and connects to the first wall, and the insulating sealing structure is insulatingly and sealingly fitted between the terminal post body and the connecting structure. The connecting structure includes a connecting arm and cantilever and cross arm connected to both ends of the connecting arm, with the cantilever arm being farther away from the first wall than the cross arm; the terminal post body includes a connected main body and a skirt portion, the skirt portion being circumferentially arranged around the main body and bent towards the cantilever arm; along the thickness direction of the first wall, the cantilever and cross arm clamp the skirt portion through the insulating sealing structure.

[0128] In this battery cell structure, the terminal post component is configured to include a terminal post body, a connecting structure, and an insulating sealing structure. The connecting structure serves as the first wall connecting the terminal post body and the housing component. Since the connecting structure includes a connecting arm, a cantilever, and a cross arm, the cantilever and cross arm can be clamped onto the skirt of the terminal post body by the insulating sealing structure. The cantilever and cross arm clamp the insulating sealing structure, resulting in high insulation and sealing performance between the connecting structure and the skirt. By configuring the skirt to circumferentially surround the main body and bend towards the cantilever, the distance between the bent portion of the skirt and the cantilever or cross arm is smaller, further compressing the insulating sealing structure. This makes the connection between the insulating sealing structure and the cantilever, cross arm, and skirt tighter, thereby improving the insulation and sealing performance of the connecting structure and the skirt, and enhancing the reliability of the battery cell. Because the skirt has a bent structure, when the electrode body is subjected to force, the bent structure of the skirt can distribute the force to different parts, giving the skirt higher strength and making it less prone to deformation. This ensures the stability of the insulation and sealing structure between the adapter structure and the skirt, thereby reducing the probability of the skirt coming off the adapter structure due to deformation. This further improves the connection reliability between the adapter structure and the electrode body, and also improves the reliability of the battery cell.

[0129] The battery cells and battery devices disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. Electrical devices comprising the battery cells and battery devices disclosed in this application can be used.

[0130] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0131] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device 1000 according to one embodiment of this application. Please refer to Figure 1, which is a structural schematic diagram of a vehicle provided in some embodiments of this application for the electrical device 1000. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0132] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0133] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which cover each other, and the first housing body 11 and the second housing body 12 together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; the first housing body 11 and the second housing body 12 may also be hollow structures both open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0134] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0135] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 20, which are arranged along the length of the housing 10. Each row of battery cells 20 includes multiple battery cells 20 arranged along the width of the housing 10; or, the multiple rows of battery cells 20 are arranged along the width of the housing 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the length of the housing 10.

[0136] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 20 that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged. It can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited in this regard. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes. For example, in Figure 2, the battery cell 20 is a cuboid.

[0137] According to some embodiments of this application, referring to Figures 3 and 4, this application provides a battery cell 20, including: a housing component 21, an electrode component 22, and a terminal component 23. The housing component 21 includes a first wall 201, and the first wall 201 has a mounting hole 201a. The electrode component 22 is housed within the housing component 21. The terminal component 23 is mounted at the mounting hole 201a and includes a terminal body 231, a connecting structure 232, and an insulating and sealing structure 233. The terminal body 231 is connected to the electrode component 22. The connecting structure 232 is circumferentially arranged around the terminal body 231 and connected to the first wall 201. The insulating and sealing structure 233 is insulatingly and sealingly fitted between the terminal body 231 and the connecting structure 232. The connecting structure 232 includes a connecting arm 2321, and a cantilever 2322 and a cross arm 2323 connected to both ends of the connecting arm 2321, with the cantilever 2322 being farther away from the first wall 201 relative to the cross arm 2323. The pole body 231 includes a main body 2311 and a skirt 2312 connected together. The skirt 2312 is arranged around the circumference of the main body 2311 and is bent toward the cantilever 2322. Along the thickness direction of the first wall 201, the cantilever 2322 and the cross arm 2323 clamp the skirt 2312 through the insulating sealing structure 233.

[0138] The housing component 21 can refer to a component that houses the electrode component 22 and the electrolyte, and protects the internal electrode component 22 and electrolyte. The housing component 21 can be made of, but is not limited to, metal or plastic. Metal materials can be, but are not limited to, steel or aluminum, and plastic materials can be, but are not limited to, polycarbonate, polypropylene, etc. The housing component 21 can be, but is not limited to, cylindrical, cuboid, flat, or other shapes.

[0139] The first wall 201 can refer to one of the multiple shell walls of the housing component 21. Exemplarily, the housing component 21 may include a peripheral wall and a top wall and a bottom wall connected to both ends of the peripheral wall, and the first wall 201 can be a peripheral wall, a top wall, or a bottom wall, etc. Referring to the preceding text, the peripheral wall can be circular, square, or other shapes, etc. For example, when the housing component 21 is cylindrical, the peripheral wall is circular; when the housing component 21 is cuboid, the peripheral wall may include multiple side walls, and the first wall 201 can be one or more of these side walls. The mounting hole 201a can refer to a hole penetrating the first wall 201.

[0140] The explanation of electrode component 22 can be found in the previous text, and will not be repeated here.

[0141] There can be one or more electrode post components 23, some of which can serve as the positive electrode and others as the negative electrode. There can be one or more electrode post components 23 serving as the positive electrode, and there can also be one or more electrode post components 23 serving as the negative electrode.

[0142] The electrode body 231 can refer to the key component in the electrode component 23 that plays a role in current conduction. The shape of the electrode body 231 can be, but is not limited to, cylindrical, square, or racetrack-shaped, etc. The main body 2311 can refer to the main structural part of the electrode body 231 and is used to electrically connect to the electrode component 22. The skirt 2312 can refer to the annular part provided around the periphery of the main body 2311. In the third direction Z of FIG4, the thickness of the skirt 2312 can be less than the thickness of the main body 2311.

[0143] The electrode body 231 can be made of, but is not limited to, aluminum, copper, or copper-aluminum composite materials, and can be made of one or more materials. For example, the electrode body 231 can be made entirely of aluminum or copper. The electrode body 231 can also be made of copper-aluminum composite material. For example, referring to Figures 4 to 8, 11, and 13, the electrode body 231 has a two-layer structure, which is an integral part formed by pressing a copper plate and an aluminum plate together.

[0144] The adapter structure 232 is an annular component surrounding the periphery of the pole body 231, used to connect to the first wall 201 and fix the pole body 231 through the insulating sealing structure 233. The material of the adapter structure 232 can be, but is not limited to, steel, aluminum, or copper. The adapter structure 232 must include at least a connecting arm 2321, a cantilever 2322, and a cross arm 2323. The connecting arm 2321, cantilever 2322, and cross arm 2323 can be connected to form a groove structure. The cantilever 2322 and cross arm 2323 can form two lateral groove walls of the groove structure and form a groove opening. The connecting arm 2321 can form the bottom groove wall of the groove structure. The groove structure formed by the connecting arm 2321, cantilever 2322, and cross arm 2323 can be, but is not limited to, U-shaped, C-shaped, or conical, etc., and no specific limitations are made here. The material of the adapter structure 232 can be, but is not limited to, metal or plastic. The metal material can be, but is not limited to, steel or aluminum, and the plastic material can be, but is not limited to, polycarbonate, polypropylene, etc.

[0145] "The skirt portion 2312 bends towards the cantilever 2322." It can be understood that, compared to a straight design for the skirt portion 2312, the above structure reduces the distance between the bent portion of the skirt portion 2312 and the cantilever 2322. This allows the insulating sealing structure 233 between the cantilever 2322 and the skirt portion 2312 to be clamped more tightly, which is beneficial to improving the insulation and sealing between the adapter structure 232 and the pole body 231.

[0146] The insulating sealing structure 233 can refer to a component that has both insulating and sealing functions, and can be, but is not limited to, a component made of plastic, rubber, etc. For example, the insulating sealing structure 233 can be a plastic ring.

[0147] In the battery cell 20 of this application embodiment, the electrode component 23 includes an electrode body 231, a connecting structure 232, and an insulating sealing structure 233. Referring to Figures 19 and 20, in this scheme, the electrode body 231 can first be assembled with the connecting structure 232 and the insulating sealing structure 233 to form the electrode component 23. Then, the tab 221 of the electrode component 22 is pulled out of the housing component 21, and the tab 221 is connected to the electrode body 231 (the connection method can be, but is not limited to, welding). Finally, the connecting structure 232 is installed into the mounting hole 201a of the first wall 201 on the outside of the housing component 21. The connection method between the connecting structure 232 and the first wall 201 can be, but is not limited to, welding.

[0148] In the above assembly process, since the shell component 21 is generally thin, especially with the trend towards higher energy density, the thickness of the shell component 21 is gradually reduced. If the connection between the terminal body 231 and the first wall 201 is complex or the connection steps are cumbersome, it is easy to increase the probability of damage to the shell component 21, affecting the reliability of the battery cell 20. For example, when the terminal is connected to the shell by riveting, the shell wall is easily damaged during the riveting process because the shell is relatively thin, which in turn affects the reliability of the battery cell. In the above technical solution of this application, the steps of insulating, sealing and fixing the terminal body 231 can be performed before the steps of connecting it to the shell component 21. This prevents the terminal body 231 from directly contacting the shell component 21, reducing the probability of damage to the shell component 21 and the terminal body 231 during installation, improving the integrity of the shell component 21, and thus improving the reliability of the battery cell 20. Moreover, as analyzed above, the above solution also helps to reduce the thickness of the shell component 21, which helps to reduce the weight of the battery cell 20 and improve the volumetric energy density of the battery cell 20.

[0149] The connection method between the pole body 231 and the tab 221 can be, but is not limited to, ultrasonic welding, ultrasonic pre-welding + laser welding, resistance welding, pressure fusion welding, brazing, adhesive bonding, etc. The connection method between the adapter structure 232 and the first wall 201 can be, but is not limited to, ultrasonic welding, ultrasonic pre-welding + laser welding, resistance welding, pressure fusion welding, brazing, or riveting, etc.

[0150] During use, the terminal body 231 of the battery cell 20 may be subjected to pulling force from the busbar component or other electrical components. For example, when the battery device 100 or electrical device 1000 to which the battery cell 20 is used is displaced, the battery cell 20 will shake up and down, and the terminal body 231 will be subjected to the force of the component connected to it; or, when there is a lot of reactive gas inside the battery cell 20, causing the gas pressure inside the casing component 21 to exceed the preset pressure value, the internal gas pressure will exert an outward pushing force on the terminal body 231.

[0151] When the above situation occurs, the electrode body 231 is subjected to a force from the electrode component 22 in the direction pointing towards the first wall 201. This will cause the skirt portion 2312 to tend to bend towards the side closer to the first wall 201 relative to the main body 2311. In this application, since the skirt portion 2312 bends towards the cantilever 2322, the bending direction of the skirt portion 2312 is opposite to the direction in which the skirt portion 2312 tends to bend under force. Therefore, the skirt portion 2312 has the ability to resist bending deformation, which can reduce the risk of bending deformation of the skirt portion 2312. Moreover, the bending structure of the skirt portion 2312 is also conducive to dispersing the force when subjected to force, which can play a strengthening role and improve the overall structural strength of the skirt portion 2312. It is understandable that the skirt portion 2312 with the above structure can improve the reliability of the structure formed by the pole body 231 and the transition structure 232, which in turn can improve the installation reliability of the insulation sealing structure 233 between the pole body 231 and the transition structure 232, and reduce the risk of insulation and sealing failure.

[0152] Furthermore, since the skirt portion 2312 bends towards the cantilever 2322 relative to the main body portion 2311, compared to the U-shaped joint surface formed between the skirt portion 2312 and the insulating sealing structure 233 when the skirt portion 2312 is straight, the joint surface between the insulating sealing structure 233 and the skirt portion 2312 and the cantilever 2322 is more complex and the area of ​​the joint surface is further increased. This allows the skirt portion 2312 to compress the insulating sealing structure 233 more tightly, which is beneficial to increase the compression amount of the insulating sealing structure 233 and the corresponding position of the cantilever 2322. This can further improve the insulation and sealing performance of the insulating sealing structure 233 between the pole body 231 and the transition structure 232, and reduce the risk of insulation and sealing failure. This also reduces the probability of sealing failure between the housing component 21 and the external environment.

[0153] In the above technical solution, the electrode post component 23 is configured to include an electrode post body 231, a connecting structure 232, and an insulating sealing structure 233. The connecting structure 232 can be used to connect the electrode post body 231 and the first wall 201 of the housing component 21. The cantilever 2322 and the cross arm 2323 of the connecting structure 232 can be clamped on the skirt portion 2312 of the electrode post body 231 by the insulating sealing structure 233. At the same time, since the skirt portion 2312 is bent towards the cantilever 2322, the distance between the bent portion of the skirt portion 2312 and the cantilever 2322 can be reduced, further compressing the insulating sealing structure 233. This makes the connection between the insulating sealing structure 233 and the electrode post body 231 and the connecting structure 232 tighter, thereby improving the insulation and sealing performance of the connecting structure 232 and the skirt portion 2312, and improving the reliability of the battery cell 20.

[0154] Because the skirt portion 2312 bends towards the cantilever 2322, when the skirt portion 2312 is under force, the bending structure of the skirt portion 2312 can resist deformation under force and also distribute the force to different parts, so that the skirt portion 2312 can have high strength and is not easy to deform. This can improve the reliability of the structure formed by the pole body 231 and the transition structure 232, reduce the probability that the skirt portion 2312 will detach from the transition structure 232 due to deformation, and thus improve the stability of the insulation and sealing structure 233 between the pole body 231 and the transition structure 232. This can also reduce the risk of insulation and sealing failure, and also improve the reliability of the battery cell 20.

[0155] In some embodiments of this application, referring to FIG5, the skirt portion 2312 includes a first section 2301 and a second section 2302. The first section 2301 is connected to the main body portion 2311, and the second section 2302 is connected to the end of the first section 2301 away from the main body portion 2311, and is bent relative to the first section 2301 toward the cantilever 2322.

[0156] The skirt portion 2312 may include two parts: the first section 2301 may refer to the part that is close to and connected to the main body portion 2311, and the second section 2302 may refer to the part of the skirt portion 2312 that is bent and tilted relative to the first section 2301.

[0157] In the thickness direction of the first wall 201, the thicknesses of the first segment 2301 and the second segment 2302 can be equal. This helps to ensure consistency between the first segment 2301 and the second segment 2302, simplifying the structure of the skirt portion 2312 and reducing the molding difficulty and manufacturing cost. Alternatively, the thickness of the first segment 2301 can be greater than the thickness of the second segment 2302. In this case, the second segment 2302 is easier to bend than the first segment 2301, reducing material usage and the weight of the electrode body 231, which helps to improve the volumetric energy density of the battery cell 20. No specific limitations are imposed on the above optional examples.

[0158] In the above technical solution, the skirt portion 2312 is bent at a certain position to form a bent structure. This allows the second section 2302 to form a reinforcing structure near the first section 2301 and provides a counter-bending moment in the direction away from the first wall 201, thereby enhancing the overall resistance of the skirt portion 2312 to bending deformation. The skirt portion 2312 with this structure has a simple bending method and good manufacturability.

[0159] In some embodiments of this application, at least two bends are formed on the skirt portion 2312.

[0160] A bend angle can refer to the included angle formed between two parts of the skirt portion 2312 that have a bend structure. For example, referring to Figure 5, the included angle between the first segment 2301 and the second segment 2302 is a bend angle. It can be understood that the skirt portion 2312 can form a number of bend angles, including but not limited to two, three, four, etc., that is, the skirt portion 2312 can achieve at least two folds.

[0161] In the above technical solution, the above structure can increase the number of bending positions of the skirt 2312, further improve the strength of the skirt 2312, and enhance the bending and torsional resistance of the skirt 2312. This can further reduce the probability of the skirt 2312 bending and deforming when the electrode body 231 is subjected to a force away from the first wall 201, thus preventing the electrode body 231 from detaching from the transition structure 232. This can further improve the stability of the structure formed by the electrode body 231 and the transition structure 232, improve the reliability of the insulation and sealing structure 233, and thus improve the reliability of the battery cell 20.

[0162] In some embodiments of this application, referring to FIG6, the skirt portion 2312 includes a first section 2301, a second section 2302 and a third section 2303. The first section 2301 is connected to the main body portion 2311, the second section 2302 is connected to the first section 2301 and the third section 2303 and is bent relative to the first section 2301 toward the cantilever 2322, and the third section 2303 is bent relative to the second section 2302 toward the first wall 201.

[0163] The skirt portion 2312 may also include three parts, wherein the third section 2303 may refer to the third part of the skirt portion 2312 other than the first section 2301 and the second section 2302.

[0164] In the above technical solution, the skirt portion 2312 with the above structure can form two bending positions, that is, two bending angles, which enables the skirt portion 2312 to have high strength and high bending and torsional resistance. At the same time, it is also beneficial to keep the structure of the skirt portion 2312 from being too complicated, thereby improving the manufacturability of the skirt portion 2312, reducing manufacturing difficulty, and thus reducing manufacturing costs.

[0165] In some embodiments of this application, referring to Figures 5 and 6, the first segment 2301 is perpendicular to the main body 2311.

[0166] In the above technical solution, the first section 2301, which is perpendicular to the main body 2311, can play a role in strengthening the body and improving the connection strength and rigidity between the first section 2301 and the main body 2311. When the electrode body 231 is subjected to a force away from the first wall 201, the above structure can reduce the probability of the first section 2301 bending and deforming relative to the main body 2311, improve the reliability of the electrode body 231, and reduce the probability of sealing failure at the location of the insulating sealing structure 233, thereby improving the reliability of the battery cell 20.

[0167] In some embodiments of this application, referring to FIG7, the thickness of the second segment 2302 along the thickness direction of the first wall 201 is H1, and the length of the second segment 2302 along the thickness direction of the connecting arm 2321 is L1, wherein H1 and L1 satisfy the following formula: y=-(P·L1) 4 ) / 8E(b·H1 3 / 12)

[0168] Where y is the deflection of the second section 2302, which should be less than 25% of the compression of the insulating sealing structure 233, in mm;

[0169] P represents the maximum rebound force of the insulating and sealing structure 233 after compression, in N.

[0170] L1 is the length of the second segment 2302, in mm;

[0171] E is the elastic modulus of the second section 2302, in GPa.

[0172] b is the circumference of the second segment 2302 in the circumferential direction of the pole body 231, in mm.

[0173] The thickness direction of the first wall 201 can be the third direction Z as shown in Figure 7.

[0174] The thickness direction of the connecting arm 2321 can be referred to the first direction X in Figure 7.

[0175] The deflection y of the second segment 2302 can be determined based on the compression amount of the portion of the insulating sealing structure 233 located between the skirt portion 2312 and the cross arm 2323, and / or, the compression amount of the portion of the insulating sealing structure 233 located between the skirt portion 2312 and the cantilever 2322. For example, the deflection y of the second segment 2302 can be determined based on the compression amount of the portion of the insulating sealing structure 233 located between the skirt portion 2312 and the cross arm 2323, wherein the compression amount of the portion of the insulating sealing structure 233 located between the skirt portion 2312 and the cross arm 2323 can be 1 mm, and the deflection y of the second segment 2302 can be less than 0.25 mm.

[0176] Among them, the part of the insulating sealing structure 233 located between the skirt 2312 and the cross arm 2323 can be referred to as the seal 2331. The P value can be calculated by multiplying the pressure area of ​​the seal 2331 by the stress per unit area.

[0177] In the above technical solution, by using the above formula, a more suitable thickness and length of the second section 2302 can be calculated, thereby giving the bending position of the skirt 2312 higher strength and rigidity. This can reduce the probability of the skirt 2312 undergoing large deformation when the pole body 231 is under stress, and also reduce the probability of the pole body 231 detaching from the cantilever 2322. This can improve the reliability of the insulation and sealing structure 233 between the transition structure 232 and the pole body 231, reduce the risk of insulation and sealing failure, and improve the reliability of the battery cell 20.

[0178] In some embodiments of this application, referring to Figures 5 and 6, the included angle between the first segment 2301 and the second segment 2302 is θ1, wherein 90 degrees ≤ θ1 < 180 degrees.

[0179] The included angle θ1 can be, but is not limited to, 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees, 145 degrees, 150 degrees, 155 degrees, 160 degrees, 165 degrees, 170 degrees, 175 degrees, 178 degrees, etc.

[0180] In the above technical solution, by setting the included angle θ1 between the first section 2301 and the second section 2302 within the above range, an appropriate included angle value can be flexibly selected according to the size of the pole body 231, and the structural strength between the first section 2301 and the second section 2302 can be adjusted to meet the stiffness and strength requirements of the skirt part 2312 of the pole body 231 of different sizes.

[0181] In some embodiments of this application, 125 degrees ≤ θ1 ≤ 145 degrees.

[0182] It is understandable that, furthermore, the included angle θ1 can be, but is not limited to, 125 degrees, 126 degrees, 127 degrees, 128 degrees, 129 degrees, 130 degrees, 131 degrees, 132 degrees, 133 degrees, 134 degrees, 135 degrees, 136 degrees, 137 degrees, 138 degrees, 139 degrees, 140 degrees, 141 degrees, 142 degrees, 143 degrees, 144 degrees, 145 degrees, etc.

[0183] In the above technical solution, by further narrowing the range of the included angle θ1, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the first section 2301 and the second section 2302 of the electrode body 231 in most sizes. This can reduce the difficulty of selecting the included angle value, simplify the manufacturing process, and thus help reduce the production cost of the battery cell 20.

[0184] In some embodiments of this application, referring to FIG6, the included angle between the second segment 2302 and the third segment 2303 is θ2, wherein 90 degrees ≤ θ2 < 180 degrees.

[0185] The included angle θ2 can be, but is not limited to, 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees, 145 degrees, 150 degrees, 155 degrees, 160 degrees, 165 degrees, 170 degrees, 175 degrees, 178 degrees, etc.

[0186] In the above technical solution, by setting the included angle θ2 between the second section 2302 and the third section 2303 within the above range, an appropriate included angle value can be flexibly selected according to the size of the pole body 231, and the structural strength between the second section 2302 and the third section 2303 can be adjusted to meet the stiffness and strength requirements of the skirt part 2312 of the pole body 231 of different sizes.

[0187] In some embodiments of this application, 125 degrees ≤ θ2 ≤ 145 degrees.

[0188] It is understandable that, furthermore, the included angle θ2 can be, but is not limited to, 125 degrees, 126 degrees, 127 degrees, 128 degrees, 129 degrees, 130 degrees, 131 degrees, 132 degrees, 133 degrees, 134 degrees, 135 degrees, 136 degrees, 137 degrees, 138 degrees, 139 degrees, 140 degrees, 141 degrees, 142 degrees, 143 degrees, 144 degrees, 145 degrees, etc.

[0189] In the above technical solution, by further narrowing the range of the included angle θ2, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the second section 2302 and the third section 2303 of the electrode body 231 in most sizes. This can reduce the difficulty of selecting the included angle value, simplify the manufacturing process, and thus help reduce the production cost of the battery cell 20.

[0190] In some embodiments of this application, referring to Figures 3 and 7, the first wall 201 has an outer wall surface 201b away from the electrode component 22. Along the thickness direction of the first wall 201, the connecting arm 2321 forms a first projection on the plane where the outer wall surface 201b is located, and the cantilever 2322 forms a second projection on the plane where the outer wall surface 201b is located. In the thickness direction of the connecting arm 2321, the size of the first projection is smaller than the size of the second projection.

[0191] The outer wall surface 201b of the first wall 201 can be referred to Figure 3.

[0192] "The plane containing the outer wall surface 201b" can refer to a plane that is coplanar with the outer wall surface 201b.

[0193] The thickness direction of the first wall 201 can be referred to the third direction Z in Figure 7. The thickness direction of the connecting arm 2321 can be referred to the first direction X in Figure 7.

[0194] "In the thickness direction of the connecting arm 2321, the size of the first projection is smaller than the size of the second projection." This can be understood as follows: since the cantilever 2322 is used to limit the insulating sealing structure 233, and to ensure that the surface of the electrode body 231 facing away from the electrode component 22 has a large area for connecting components such as the busbar component, the size of the cantilever 2322 is usually relatively small along the thickness direction of the connecting arm 2321. By making the size of the first projection smaller than the size of the second projection in the thickness direction of the connecting arm 2321, the connecting arm 2321 can be considered as an upright arm plate, thus reducing the size of the connecting arm 2321 in the first direction X. The connecting arm 2321 can be perpendicular to the outer wall surface 201b; or, the connecting arm 2321 can be approximately perpendicular to the outer wall surface 201b, that is, the angle between the connecting arm 2321 and the outer wall surface 201b is close to 90 degrees.

[0195] Secondly, when the adapter structure 232 limits the position of the pole body 231, the cantilever 2322 is used to press a portion of the insulating sealing structure 233 between the skirt portion 2312 and the cross arm 2323. For ease of understanding, the portion of the insulating sealing structure 233 located between the skirt portion 2312 and the cross arm 2323 can be referred to as the seal 2331. Since the connecting arm 2321 is perpendicular or approximately perpendicular to the outer wall surface 201b, the compression arm 235 formed by the adapter structure 232 on the seal 2331 is relatively short (see Figure 8). The compression arm 235 can refer to the line connecting the two points in Figure 8. This increases the force exerted by the connecting arm 2321 and the cantilever 2322 on the seal 2331, thereby increasing the compression of the seal 2331 and improving the sealing reliability of the seal 2331.

[0196] To facilitate understanding, a further example can be provided: the adapter structure 232 can be installed on the pole body 231 via the insulating sealing structure 233 through riveting, thereby forming the connecting arm 2321 and the cantilever 2322. When the force applied by the riveting is removed, because the compression arm 235 formed by the adapter structure 232 on the seal 2331 is relatively short, the reaction arm of the seal 2331's rebound on the cantilever 2322 is also relatively short. This allows the seal 2331 to maintain a large amount of compression, which helps to improve the problem of compression attenuation of the seal 2331, ensuring that the compression of the seal 2331 remains at the expected set value, thereby improving the sealing reliability of the seal 2331 between the skirt 2312 and the cross arm 2323.

[0197] Furthermore, since the connecting arm 2321 is perpendicular or approximately perpendicular to the outer wall surface 201b, the structure formed by the connecting arm 2321, cantilever 2322, and cross arm 2323 with the electrode body 231 is more compact. This is beneficial for reducing the size of the transition structure 232 in the first direction X and the second direction Y, making the overall structure of the electrode component 23 more compact. Because the size of the transition structure 232 in the second direction Y is more compact, with the same size of the first wall 201 in the second direction Y, the electrode body 231 in the electrode component 23 of this application can be made larger in the second direction Y. This is beneficial for increasing the exposed surface 2311a of the electrode body 231. When the electrode body 231 connects to the busbar or other electrical connection components through the exposed surface 2311a, there can be a larger connection surface (e.g., a welding surface) between the exposed surface 2311a and the busbar or other electrical connection components. Therefore, the electrode body 231 can also have a larger current-carrying area, which can improve charging and discharging efficiency and facilitate a higher-performance narrow cell design.

[0198] In the above technical solution, the connecting arm 2321 can be a vertical arm perpendicular to or approximately perpendicular to the first wall 201. On the one hand, this reduces the compressive force arm 235 of the transition structure 232 on the insulating sealing structure 233, enhances the compressive effect of the cantilever 2322 on the portion of the insulating sealing structure 233 located between the skirt 2312 and the cross arm 2323, strengthens the insulation and sealing effect, and helps improve the insulation and sealing reliability of the insulating sealing structure 233 between the skirt 2312 and the cross arm 2323, thereby improving the overall reliability of the battery cell 20. On the other hand, the above structure also makes the structure of the transition structure 232 more compact, thus making the overall structure of the electrode component 23 more compact. As a result, the electrode body 231 can have a larger exposed surface 2311a, which helps to increase the current-carrying area of ​​the electrode body 231 and improve the current-carrying capacity of the electrode body 231. Secondly, the perpendicularity of the connecting arm 2321 to the first wall 201 is easier to achieve during manufacturing, which can improve manufacturability and reduce costs.

[0199] In some embodiments of this application, referring to Figures 4, 7 and 8, the connecting arm 2321 is perpendicular to the first wall 201.

[0200] In the above technical solution, by making the connecting arm 2321 perpendicular to the first wall 201, the compression arm 235 of the adapter structure 232 on the insulating sealing structure 233 can be smaller, which can further enhance the insulation and sealing effect of the insulating sealing structure 233 and improve the reliability of the battery cell 20. Secondly, adopting the above structure can also make the structure of the adapter structure 232 more compact, thereby further reducing the size of the adapter structure 232. Under the premise of the same size terminal component 23, the terminal body 231 has a larger exposed surface 2311a, which further improves the current carrying capacity of the terminal body 231.

[0201] In some embodiments of this application, referring to Figures 7 and 8, the cantilever 2322 includes a root portion 23221 and a beam portion 23222, the beam portion 23222 being connected to the connecting arm 2321 via a rounded transition at the root portion 23221; the insulating sealing structure 233 includes a seal 2331, the seal 2331 being at least partially insulating and sealingly fitted between the cross arm 2323 and the skirt portion 2312.

[0202] The root portion 23221 can refer to the part of the cantilever 2322 that is connected to the connecting arm 2321, and the beam portion 23222 can refer to the part of the cantilever 2322 that is close to the pole body 231. Referring to Figure 8, to easily distinguish between the root portion 23221 and the beam portion 23222, two auxiliary dashed lines are drawn on the cantilever 2322 in Figure 8. In the cantilever 2322, the part located between the two auxiliary dashed lines is the root portion 23221, and the remaining part is the beam portion 23222.

[0203] The seal 2331 can refer to the structure or component in the insulating sealing structure 233 that performs a sealing function. The seal 2331 can be made of, but is not limited to, rubber, plastic, etc., wherein the rubber material can be, but is not limited to, nitrile rubber, etc., and the plastic material can be, but is not limited to, tetrafluoroethylene, etc. For example, the seal 2331 can be an annular component arranged circumferentially around the pole body 231, for example, the seal 2331 can be a rubber sealing ring.

[0204] "The seal 2331 is at least partially insulated and sealingly fitted between the cross arm 2323 and the skirt portion 2312" can be understood as the seal 2331 being either entirely disposed between the cross arm 2323 and the skirt portion 2312 or partially disposed between the cross arm 2323 and the skirt portion 2312.

[0205] In the above technical solution, by configuring the cantilever 2322 with the aforementioned structure, the beam 23222 is connected to the connecting arm 2321 via a rounded transition at the root 23221. This results in a smoother and more rounded connection between the cantilever 2322 and the connecting arm 2321, reducing the likelihood of stress concentration. Furthermore, by configuring the insulating sealing structure 233 to include a seal 2331, which provides a seal between the cross arm 2323 and the skirt 2312, the problem of seal failure at the location of the electrode post component 23 is reduced, thereby improving the reliability of the battery cell 20.

[0206] In some embodiments of this application, referring to Figures 7 and 8, the beam portion 23222 is inclined or bent relative to the root portion 23221 toward the first wall 201.

[0207] The cantilever 2322 can be manufactured by tilting the beam portion 23222 relative to the root portion 23221 towards the first wall 201, for example, by casting or injection molding. The cantilever 2322 can also be formed after the base body is formed, by further processing to bend the beam portion 23222 relative to the root portion 23221 towards the first wall 201, for example, by riveting the root portion 23221 and the beam portion 23222, or by bending the root portion 23221 and the beam portion 23222.

[0208] As analyzed above, the pole body 231 is more susceptible to forces directed away from the first wall 201, which could lead to the pole body 231 detaching from the transition structure 232 and causing the cantilever 2322 to deform. In the above structure, the beam 23222 is inclined or bent relative to the root 23221 towards the first wall 201. The cantilever 2322 has high strength and stiffness. When the pole body 231 is subjected to a force away from the first wall 201, the inclined or bent structure of the cantilever 2322 needs to be overcome first, the cantilever 2322 needs to be straightened, and then the beam 23222 needs to be inclined relative to the root 23221 away from the first wall 201. Only in this way can the skirt 2312 detach from the transition structure 232. Obviously, to complete this process, the pole body 231 needs to withstand a greater force, which is more difficult. This reduces the risk of the pole body 231 detaching from the transition structure 232.

[0209] Secondly, since the skirt 2312 bends towards the cantilever 2322, and the bending direction of the skirt 2312 is opposite to the direction of the inclined or bent structure in the cantilever 2322, the pole body 231 needs to overcome the bending structure of the skirt 2312 in order to detach from the transition structure 232. That is, the skirt 2312 needs to be straightened and then bent towards the first wall 201. Combined with the above, the difficulty of the pole body 231 detaching from the transition structure 232 is further increased, and the probability of detachment is also lower. This makes the overall structure of the pole component 23 more stable and reliable.

[0210] In the above technical solution, the above structure can improve the overall strength of the cantilever 2322. Moreover, the tilting or bending direction of the cantilever 2322 is opposite to the direction in which the pole body 231 is forced to detach from the transition structure 232, and also opposite to the bending direction of the skirt 2312. This helps to increase the difficulty of bending the skirt 2312 towards the side closer to the first wall 201, and reduces the risk of the connecting arm 2321 bending away from the pole body 231. This can reduce the probability of the pole body 231 being forced to detach from the transition structure 232, improve the overall reliability of the pole component 23, and further improve the reliability of the insulation and sealing structure 233, thereby improving the reliability of the battery cell 20.

[0211] In some embodiments of this application, referring to FIG10, the included angle between the root portion 23221 and the beam portion 23222 is θ3, wherein 90 degrees ≤ θ3 < 180 degrees.

[0212] θ3 can be, but is not limited to, 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees, 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees, 145 degrees, 150 degrees, 155 degrees, 160 degrees, 170 degrees, 175 degrees, etc.

[0213] In the above technical solution, by setting the included angle θ3 between the root 23221 and the beam 23222 within the above range, an appropriate included angle value can be flexibly selected according to the size of the pole body 231, and the structural strength between the root 23221 and the beam 23222 can be adjusted to meet the stiffness and strength requirements of cantilever 2322 of different sizes.

[0214] In some embodiments of this application, 125 degrees ≤ θ3 ≤ 145 degrees.

[0215] It is understandable that, furthermore, the included angle θ3 can be, but is not limited to, 125 degrees, 126 degrees, 127 degrees, 128 degrees, 129 degrees, 130 degrees, 131 degrees, 132 degrees, 133 degrees, 134 degrees, 135 degrees, 136 degrees, 137 degrees, 138 degrees, 139 degrees, 140 degrees, 141 degrees, 142 degrees, 143 degrees, 144 degrees, 145 degrees, etc.

[0216] In the above technical solution, by further narrowing the range of the included angle θ3, it is beneficial to select a more suitable included angle value more accurately to meet the strength and stiffness requirements of the structure between the root 23221 and the beam 23222 of the pole body 231 in most sizes. This can reduce the difficulty of selecting the included angle value, simplify the manufacturing process, and thus help reduce the production cost of the battery cell 20.

[0217] In some embodiments of this application, referring to Figures 11 and 12, the cantilever 2322 includes a root portion 23221 and a beam portion 23222. The root portion 23221 is arc-shaped and connects the connecting arm 2321 and the beam portion 23222. The insulating sealing structure 233 includes a sealing member 2331, which is at least partially insulating and sealingly fitted between the cross arm 2323 and the skirt portion 2312.

[0218] "The root 23221 is arc-shaped" can be understood as the root 23221 being an arc arm (see Figure 11). For ease of understanding, Figures 11 and 12 are distinguished by two auxiliary dotted lines on the cantilever 2322. The part between the two auxiliary dotted lines is the root 23221, and the rest is the beam 23222.

[0219] In the above technical solution, the root portion 23221 is arc-shaped, resulting in a smoother transition at the connection point between the cantilever 2322 and the connecting arm 2321, reducing the risk of stress concentration and improving the reliability of the cantilever 2322. This, in turn, improves the reliability of the transition structure 232, thereby enhancing the overall reliability of the terminal post component 23. Furthermore, the arc-shaped root portion 23221 has a larger radius, reducing molding difficulty regardless of whether casting, bending, or riveting is used, thus improving product yield and reducing manufacturing costs. By configuring the insulating sealing structure 233 to include a seal 2331, which provides a seal between the cross arm 2323 and the skirt portion 2312, the problem of seal failure at the location of the terminal post component 23 is reduced, improving the reliability of the battery cell 20.

[0220] In some embodiments of this application, referring to FIG12, the beam portion 23222 is inclined or bent relative to the root portion 23221 toward the direction close to the first wall 201, and the included angle between the beam portion 23222 and the connecting arm 2321 is θ4, wherein θ4 < 90 degrees.

[0221] The cantilever 2322 can be manufactured by tilting the beam portion 23222 relative to the root portion 23221 towards the first wall 201, for example, by casting or injection molding. The cantilever 2322 can also be formed after the base body is formed, by further processing to bend the beam portion 23222 relative to the root portion 23221 towards the first wall 201, for example, by riveting the root portion 23221 and the beam portion 23222, or by bending the root portion 23221 and the beam portion 23222.

[0222] The technical effects of the inclined or bent structure of the cantilever 2322 can be referred to in the previous text, and will not be repeated here.

[0223] When the beam portion 23222 is inclined or bent relative to the root portion 23221 towards the first wall 201, the root portion 23221 may also be inclined relative to the connecting arm 2321 towards the side away from the pole body 231. Therefore, by making the included angle θ4 between the beam portion 23222 and the connecting arm 2321 less than 90 degrees, the connection position of the root portion 23221 and the connecting arm 2321 is tangent. Alternatively, the root portion 23221 may be inclined relative to the connecting arm 2321 towards the side closer to the pole body 231. As a result, when the pole body 231 is subjected to a force away from the first wall 201, the probability of the beam portion 23222 undergoing a large positional deformation relative to the connecting arm 2321 is relatively low, and the wind direction of the pole body 231 detaching from the transition structure 232 is also relatively small, which can improve the overall reliability of the pole component 23.

[0224] In the above technical solution, the above structure can improve the overall strength of the cantilever 2322. Moreover, the tilting or bending direction of the cantilever 2322 is opposite to the direction in which the pole body 231 is forced to detach from the transition structure 232, and also opposite to the bending direction of the skirt 2312. This helps to increase the difficulty of bending the skirt 2312 towards the side closer to the first wall 201, and reduces the risk of the connecting arm 2321 bending away from the pole body 231. This can reduce the probability of the pole body 231 being forced to detach from the transition structure 232, improve the reliability of the pole component 23, and further improve the reliability of the insulation and sealing structure 233, thereby improving the reliability of the battery cell 20.

[0225] In some embodiments of this application, 45 degrees ≤ θ4 < 90 degrees.

[0226] It is understandable that, furthermore, the included angle θ4 can be, but is not limited to, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 88 degrees, etc.

[0227] In the above technical solution, by further narrowing the range of the included angle θ4, it is beneficial to select a more suitable included angle value more accurately to meet the included angle between the beam 23222 and the connecting arm 2321 in most sizes of the pole body 231, so as to meet the strength and stiffness requirements of the cantilever 2322. This reduces the difficulty of selecting the included angle value, simplifies the manufacturing process, and thus helps to reduce the production cost of the battery cell 20.

[0228] In some embodiments of this application, referring to Figures 13 and 14, the cantilever 2322 includes a root portion 23221, a beam portion 23222, and a bent portion 23223. The beam portion 23222 is connected to the connecting arm 2321 by an arc transition through the root portion 23221. The bent portion 23223 is located at the end of the beam portion 23222 away from the root portion 23221 and is bent towards the first wall 201. The insulating sealing structure 233 includes a sealing element 2331, which is at least partially insulating and sealingly fitted between the cross arm 2323 and the skirt portion 2312.

[0229] The explanations for the root portion 23221 and the beam portion 23222 can be found above. The bent portion 23223 can refer to the part of the cantilever 2322 that has a bent structure relative to the beam portion 23222. For ease of understanding, referring to Figures 13 and 14, three auxiliary dashed lines are drawn in the cantilever 2322. The portion between the two auxiliary dashed lines closest to the connecting arm 2321 is the root portion 23221; the portion between the auxiliary dashed line furthest from the connecting arm 2321 and the middle auxiliary dashed line is the beam portion 23222; and the remaining portion is the bent portion 23223.

[0230] The explanation of seal 2331 can be found in the previous text, and will not be repeated here.

[0231] In the above technical solution, on the one hand, the cantilever 2322 can be connected to the connecting arm 2321 with a rounded transition, so the connection position between the cantilever 2322 and the connecting arm 2321 is relatively smooth and rounded, which can reduce the probability of stress concentration. On the other hand, the cantilever 2322 can be formed into a bending structure, which can improve its own strength and rigidity, reduce the probability of the cantilever 2322 undergoing large deformation when the pole body 231 is subjected to a force away from the first wall 201, thereby reducing the risk of the pole body 231 detaching from the transition structure 232, improving the reliability of the insulation sealing structure 233, and thus improving the reliability of the battery cell 20. By setting the insulation sealing structure 233 to include a sealing element 2331, the sealing element 2331 can play a sealing role between the cross arm 2323 and the skirt 2312, reducing the problem of sealing failure at the location of the pole component 23, and improving the reliability of the battery cell 20.

[0232] In some embodiments of this application, referring to FIG14, the beam portion 23222 is inclined or bent relative to the root portion 23221 in a direction close to the first wall 201, and the included angle between the beam portion 23222 and the connecting arm 2321 is θ5, wherein 85 degrees ≤ θ5 ≤ 95 degrees.

[0233] θ5 can be, but is not limited to, 85 degrees, 86 degrees, 87 degrees, 88 degrees, 89 degrees, 90 degrees, 91 degrees, 92 degrees, 93 degrees, 94 degrees, 95 degrees, etc.

[0234] In the above technical solution, by setting the included angle θ5 between the beam 23222 and the connecting arm 2321 within the above range, an appropriate included angle value can be flexibly selected according to the size of the pole body 231, and the structural strength and stiffness of the structure formed by the beam 23222 and the connecting arm 2321 can be adjusted to meet the stiffness and strength requirements of the transition structure of different sizes.

[0235] In some embodiments of this application, referring to FIG14, the included angle between the beam portion 23222 and the bending portion 23223 is θ6, wherein 85 degrees ≤ θ6 ≤ 95 degrees.

[0236] θ6 can be, but is not limited to, 85 degrees, 86 degrees, 87 degrees, 88 degrees, 89 degrees, 90 degrees, 91 degrees, 92 degrees, 93 degrees, 94 degrees, 95 degrees, etc.

[0237] In the above technical solution, by setting the included angle θ6 between the beam 23222 and the bending part 23223 within the above range, an appropriate included angle value can be flexibly selected according to the size of the pole body 231, and the structural strength and stiffness of the structure formed by the beam 23222 and the bending part 23223 can be adjusted to meet the stiffness and strength requirements of cantilever 2322 of different sizes.

[0238] In some embodiments of this application, referring to Figures 3, 7, 9, 11 and 13, the first wall 201 has an outer wall surface 201b away from the electrode component 22. Along the thickness direction of the first wall 201, the projection of the root 23221 onto the plane of the outer wall surface 201b and the projection of the seal 2331 onto the plane of the outer wall surface 201b at least partially overlap.

[0239] The thickness direction of the first wall 201 can be the third direction Z as shown in Figures 3, 7, 9, 11 and 13.

[0240] The plane containing the outer wall surface 201b can be referred to in the previous explanation, and will not be repeated here.

[0241] The statement that "the projection of the root 23221 onto the plane of the outer wall surface 201b and the projection of the seal 2331 onto the plane of the outer wall surface 201b at least partially overlap" can be understood as follows: the projection of the root 23221 onto the plane of the outer wall surface 201b can be entirely located within the projection of the seal 2331 onto the plane of the outer wall surface 201b, or a portion of the projection of the root 23221 onto the plane of the outer wall surface 201b is located within the projection of the seal 2331 onto the plane of the outer wall surface 201b. Taking the cantilever 2322, the skirt 2312, and the crossarm 2323 arranged vertically as an example, at least a portion of the seal 2331 is located directly below the root 23221. It can be understood that both the beam 23222 and the root 23221 can compress the seal 2331 through the skirt 2312, providing a larger compression surface for the seal 2331 and thus increasing the compression amount of the seal 2331.

[0242] In the above technical solution, the structure can increase the compression surface of the cantilever 2322 on the seal 2331, thereby enabling the seal 2331 to have a greater compression amount between the cross arm 2323 and the skirt 2312, which can enhance the sealing performance of the seal 2331, improve the sealing reliability between the adapter structure 232 and the pole body 231, thereby improving the reliability of the pole component 23, and ultimately improving the reliability of the battery cell 20.

[0243] In some embodiments of this application, referring to Figures 7 and 11, the side of the skirt portion 2312 facing away from the cantilever 2322 forms a gap 234 with the insulating sealing structure 233 and the transition structure 232.

[0244] The gap 234 can refer to a space with a certain size.

[0245] For example, referring to FIG11, the insulating sealing structure 233 may include a plurality of seals 2331, which may be evenly disposed between the cross arm 2323 and the skirt portion 2312, and a gap 234 may be formed between at least two adjacent seals 2331.

[0246] For example, referring to FIG7, the insulating sealing structure 233 may also include a sealing element 2331 and a first insulating element 2332. The sealing element 2331 is disposed between the cross arm 2323 and the skirt portion 2312, and the first insulating element 2332 is disposed between the connecting arm 2321 and the skirt portion 2312, and / or, the first insulating element 2332 is disposed between the cantilever 2322 and the skirt portion 2312, forming a gap 234 between the first insulating element 2332 and the sealing element 2331. The first insulating element 2332 can refer to a component that provides insulation, and can be, but is not limited to, a plastic part, a rubber part, or a ceramic part, etc. The material of the plastic part can include, but is not limited to, polypropylene, polycarbonate, or polystyrene, etc. The material of the rubber part can include, but is not limited to, nitrile rubber, silicone rubber, etc., etc., and the material of the ceramic part can include, but is not limited to, alumina ceramic, titanium dioxide ceramic, etc. Optionally, the first insulating element 2332 can be an injection molded part. The first insulating component 2332 can be a structural component obtained by injection molding, or it can be directly injection molded between the connecting arm 2321, the cantilever 2322 and the pole body 231.

[0247] In the above technical solution, by adopting the above structure, the gap 234 can provide space for at least part of the insulation sealing structure 233 to expand and deform, release gas inside the insulation sealing structure 233, reduce the risk that at least part of the insulation sealing structure 233 cannot release gas or expand in time when compressed, reduce the risk of the adapter structure 232 being damaged by compression, improve the reliability of the pole component 23, and thus improve the reliability of the battery cell 20.

[0248] In some embodiments of this application, referring to FIG15, the adapter structure 232 is an integrally formed part and includes a preformed part 2304 and a riveting part 2305. The preformed part 2304 is connected to the first wall 201 and includes a cross arm 2323. The riveting part 2305 is connected to the preformed part 2304 and includes a connecting arm 2321 and a cantilever 2322; and / or, the adapter structure 232 and the housing component 21 are integrally formed.

[0249] The adapter structure 232 can be made of metal; for example, it can be made of aluminum. Optionally, the adapter structure 232 can be pre-stamped. The pre-formed part 2304 can refer to the part that is pre-made and will not be further processed, and the riveting part 2305 can refer to the part that needs to be riveted later. Referring to Figures 15 and 16, the insulating sealing structure 233 can include a sealing element 2331 and a first insulating element 2332. The skirt part 2312 can be assembled to the cross arm 2323 through the sealing element 2331. Then, the first insulating element 2332 is assembled to the skirt part 2312 and the main body part 2311. Finally, the riveting part 2305 is pressed onto the first insulating element 2332 by riveting to form the pole member 23 shown in Figure 4.

[0250] In other examples, the first insulating member 2332 may also be assembled later. For example, the riveting forming part 2305 is bent towards the skirt part 2312 by riveting to form the connecting arm 2321 and the cantilever 2322. Then, the first insulating member 2332 is injection molded in the gap formed between the connecting arm 2321, the cantilever 2322 and the pole body 231.

[0251] Furthermore, in addition to the adapter structure 232 being a one-piece molded part, the adapter structure 232 can also be molded on the housing component 21, making the adapter structure 232 and the housing component 21 a single piece. Alternatively, the adapter structure 232 can be integrally molded with the housing component 21, meaning that a portion of the structure of the housing component 21 forms the adapter structure 232. For example, the first wall 201 portion of the housing component 21 can be stamped to form the adapter structure 232.

[0252] In the above technical solution, the adapter structure 232 is a one-piece molded part, and the connecting arm 2321 and cantilever 2322 are formed by riveting. This results in good overall consistency of the adapter structure 232 and fewer connection gaps, enhancing the connection strength between the adapter structure 232 and the electrode body 231, reducing the risk of loosening. Furthermore, the riveting and tightening method creates a good sealing effect, further improving the sealing performance between the adapter structure 232 and the electrode body 231, which is beneficial to improving the reliability of the adapter structure 232, and consequently, the reliability of the electrode component 23. Since the adapter structure 232 and the housing component 21 are integrally formed, the structure formed by the adapter structure 232 and the housing component 21 has high consistency, further reducing connection gaps, enhancing the sealing effect, and improving the reliability of the battery cell 20.

[0253] In some embodiments of this application, referring to Figures 7 and 8, the cross arm 2323 includes an outer ring surface 2323a facing the skirt portion 2312, and the insulating sealing structure 233 includes a seal 2331. The seal 2331 includes a first sealing portion 23311, which is insulatingly and sealingly fitted between the outer ring surface 2323a and the skirt portion 2312.

[0254] The outer annular surface 2323a can refer to the annular surface of the cross arm 2323 facing the skirt edge 2312.

[0255] The seal 2331 may consist only of the first sealing portion 23311, in which case the first sealing portion 23311 is the seal 2331. The seal 2331 may also include more than just the first sealing portion 23311, in which case the first sealing portion 23311 refers to the portion located between the outer annular surface 2323a and the skirt portion 2312.

[0256] In the above technical solution, by adopting the above structure, the first sealing part 23311 can form a larger sealing surface between the cross arm 2323 and the skirt part 2312, which can have better sealing performance, improve the reliability of the pole component 23, and thus improve the reliability of the battery cell 20.

[0257] In some embodiments of this application, referring to Figures 7 and 8, the cross arm 2323 includes an inner annular surface 2323b surrounding the pole body 231, and the seal 2331 includes a second sealing portion 23312, which is insulated and sealed between the inner annular surface 2323b and the pole body 231, and connects to the first sealing portion 23311.

[0258] The inner annular surface 2323b can refer to the annular surface of the transverse arm 2323 arranged circumferentially around the pole body 231.

[0259] Referring to the preceding text, the seal 2331 may include not only the first sealing portion 23311, but also the second sealing portion 23312, thereby forming an L-shaped structure with the second sealing portion 23312 and the first sealing portion 23311. A first sealing line can be formed between the first sealing portion 23311 and the outer annular surface 2323a, and a second sealing line can be formed between the second sealing portion 23312 and the inner annular surface 2323b. Through the cooperation of the second sealing line and the first sealing line, a larger sealing surface can be formed between the seal 2331 and the cross arm 2323, thereby improving the sealing performance and reducing the risk of seal failure.

[0260] In the above technical solution, the above structure can make the combination of the seal 2331 and the cross arm 2323 more compact, improve the connection reliability of the seal 2331 and the cross arm 2323, and also increase the sealing surface of the seal 2331 and the cross arm 2323, thereby further improving the sealing performance, further improving the reliability of the pole component 23, and improving the reliability of the battery cell 20.

[0261] In some embodiments of this application, referring to Figures 7 and 11, the insulating sealing structure 233 includes a sealing element 2331 and a first insulating element 2332. The cross arm 2323 and the skirt portion 2312 are insulated and sealed together by the sealing element 2331. The connecting arm 2321 and the cantilever 2322 are insulated and connected to the pole body 231 by the first insulating element 2332.

[0262] The explanation of seal 2331 and first insulating element 2332 can be found in the previous text, and will not be repeated here.

[0263] In the above technical solution, the first insulating component 2332 can play an insulating role around the electrode body 231, reducing the risk of short circuit or other electrical safety accidents. Moreover, the first insulating component 2332 can also play a sealing role together with the sealing component 2331. The first insulating component 2332 serves as the first sealing defense line, and the sealing component 2331 serves as the second sealing defense line, thereby playing a dual protection role, reducing the probability of electrolyte seeping out from the inside of the casing component 21, and effectively resisting the intrusion of moisture and dust, thereby improving the reliability of the battery cell 20.

[0264] In some embodiments of this application, the first insulating element 2332 is injection molded between the connecting arm 2321, the cantilever 2322 and the pole body 231.

[0265] In the above technical solution, the first insulating component 2332, as an injection-molded part, can fill the tiny gaps between the connecting arm 2321, the cantilever 2322, and the terminal body 231, providing a more comprehensive sealing coverage, enhancing the sealing effect, and also facilitating adaptation to the irregular shape of the transition structure 232, thus possessing better flexibility, thereby improving manufacturability and product yield. Secondly, the first insulating component 2332, through injection molding, can also more tightly wrap the connecting arm 2321, the cantilever 2322, and the terminal body 231 together, making the components bonded together, which can improve the overall integrity of the terminal component 23. When the battery cell 20 is subjected to external impact or vibration, this tight structure can reduce the shaking and displacement of the internal components, maintain the structural stability of the terminal component 23, and help improve the reliability of the battery cell 20.

[0266] In some embodiments of this application, the seal 2331 and the first insulating member 2332 are integrally formed.

[0267] In the above technical solution, the above structure reduces assembly steps and simplifies the assembly process. For mass production of battery cells 20, it can improve assembly efficiency and reduce waste of raw materials. Since it is not necessary to manufacture the sealing component 2331 and the first insulating component 2332 separately and then connect or assemble them, it reduces scrap materials and unnecessary processing steps in the production process, thereby reducing manufacturing costs. The integral molding of the sealing component 2331 and the first insulating component 2332 also helps to eliminate the problem of possible small gaps or loose connections between the sealing component 2331 and the first insulating component 2332, which can reduce the risk of failures such as poor sealing and reduce the probability of electrolyte leakage, thus improving the reliability of the battery cell 20.

[0268] In some embodiments of this application, referring to Figures 7 and 11, the insulating sealing structure 233 includes a second insulating member 2333, which covers the outer peripheral side of the connecting arm 2321 and the cantilever 2322.

[0269] The explanation of the second insulating component 2333 can be found in the explanation of the first insulating component 2332, and will not be repeated here.

[0270] During the assembly and use of the battery cell 20, the terminal body 231 may come into accidental contact with surrounding metal parts (such as the housing part 21, the terminals of other battery cells 20, or conductive connection parts in the battery pack). Without insulation protection, a short circuit can easily occur. Therefore, as a key component for current to enter and exit the battery cell 20, the terminal body 231 can provide an effective insulation barrier by providing a second insulating element 2333 on the outer peripheral side of the connecting arm 2321 and the cantilever 2322, thereby reducing the probability of a short circuit.

[0271] In a high-voltage battery cell, an uneven electric field may cause partial discharge, which can damage the battery's performance and lifespan. By covering the outer periphery of the connecting arm 2321 and the cantilever 2322 with the second insulating element 2333, a uniform insulating environment can be formed around the electrode body 231, which helps to stabilize the electric field distribution around the electrode body 231.

[0272] During the transportation, installation and use of the battery cell 20, the terminal body 231 may be subjected to various external impacts, such as collisions, vibrations, etc. The second insulating component 2333 can play a buffering role on the outer periphery of the adapter structure 232, absorb some of the external forces, reduce the direct impact on the terminal body 231, and help ensure the integrity and conductivity of the terminal body 231.

[0273] In the above technical solution, the structure described above can provide insulation protection on the outer circumference of the electrode body 231, reducing the risk of electrical safety accidents such as short circuits, and stabilizing the surrounding electric field distribution, thus reducing the probability of damage to the battery cell 20 due to uneven electric field. Secondly, the second insulating component 2333 can also form a protective layer on the periphery of the connecting arm 2321 and the cantilever 2322, which can act as a buffer and vibration damping layer, thereby reducing the impact on the electrode body 231, lowering the probability of damage to the electrode body 231, and thus improving the reliability of the battery cell 20.

[0274] In some embodiments of this application, referring to FIG17, the first insulating component 2332 is injection molded between the connecting arm 2321, the cantilever 2322, and the pole body 231, and the second insulating component 2333 is injection molded on the outer peripheral side of the connecting arm 2321 and the cantilever 2322. That is, the first insulating component 2332 and the second insulating component 2333 can be obtained by two encapsulation molding processes. This allows for the filling of microscopic gaps formed on the surface or inside due to mold precision, material shrinkage, etc., during the first encapsulation molding process, thereby further improving the insulation performance. Moreover, by injection molding the second insulating component 2333 and the first insulating component 2332 separately, the molding difficulty and manufacturing cost can be reduced.

[0275] In some embodiments of this application, referring to FIG18, the second insulating member 2333 and the first insulating member 2332 are integrally molded parts. It can be understood that the second insulating member 2333 and the first insulating member 2332 are molded in one piece with adhesive coating, which can reduce assembly steps and improve work efficiency, while the sealing member 2331 can be assembled separately, which can improve the flexibility of use of the sealing member 2331 and facilitate the replacement of the sealing member 2331 in the future.

[0276] In some embodiments of this application, referring to FIG18, the connecting arm 2321 is provided with a glue injection hole 2321a, and a portion of the second insulating member 2333 passes through the glue injection hole 2321a and connects to the first insulating member 2332. It can be understood that when the second insulating member 2333 and the first insulating member 2332 are integrally injection molded, the injection molding liquid can form the second insulating member 2333 on the outer peripheral side of the connecting arm 2321 and the cantilever 2322, while a portion enters from between the cantilever 2322 and the main body 2311, and between the cantilever 2322, the connecting arm 2321 and the skirt 2312, and another portion directly enters from the glue injection hole 2321a, thereby forming the first insulating member 2332. This method can increase the flow rate of the injection molding liquid, thereby improving molding efficiency and saving time.

[0277] In some embodiments of this application, the second insulating member 2333, the first insulating member 2332, and the sealing member 2331 are integrally formed parts.

[0278] In the above technical solution, the above structure reduces assembly steps and simplifies the assembly process. For large-scale production of battery cells 20, it can improve assembly efficiency and reduce waste of raw materials. Since it is not necessary to manufacture the sealing component 2331, the first insulating component 2332, and the second insulating component 2333 separately and then connect or assemble them, it reduces scrap materials and unnecessary processing steps in the production process, thereby reducing manufacturing costs. The integral molding of the sealing component 2331, the first insulating component 2332, and the second insulating component 2333 also helps to eliminate the problem of possible small gaps or loose connections between the sealing component 2331, the first insulating component 2332, and the second insulating component 2333, which can reduce the risk of failure such as poor sealing, reduce the probability of electrolyte leakage, and improve the reliability of the battery cell 20.

[0279] In some embodiments of this application, referring to Figures 7 and 8, the insulating sealing structure 233 includes a sealing member 2331 and a third insulating member 2334. The cross arm 2323 and the skirt portion 2312 are insulated and sealed together by the sealing member 2331. The third insulating member 2334 is disposed on the side of the transition structure 232 near the electrode component 22 and is sealed together with the sealing member 2331.

[0280] The explanation of the third insulating member 2334 can be found in the explanation of the first insulating member 2332 mentioned above. For example, the third insulating member 2334 can be a plastic part. The third insulating member 2334 can be tightly attached to the inner peripheral wall surface of the housing component 21.

[0281] In the above technical solution, the third insulating component 2334 provides an effective insulating barrier on the side of the transition structure 232 near the electrode component 22, isolating the electrode component 22 from the first wall 201 and the transition structure 232, reducing the risk of short circuits, and allowing current to flow along a predetermined path, thereby improving the stability and reliability of the battery cell 20. The third insulating component 2334 also acts as a barrier, preventing electrolyte from flowing to the terminal component 23, reducing the risk of electrolyte leakage, and preventing external moisture, dust, and other impurities from entering the housing component 21, causing internal short circuits and corrosion in the battery cell 20. In other words, the third insulating component 2334 helps maintain a clean environment inside the housing component 21, ensuring the normal operation of the chemical reactions inside the battery cell 20. The third insulating component 2334 also acts as a buffer between the first wall 201 and the electrode component 22, reducing the probability of impact between them and damage to the electrode component 22, thus improving the reliability of the battery cell 20.

[0282] In some embodiments of this application, the third insulating element 2334 and the sealing element 2331 are integrally formed.

[0283] In the above technical solution, the above structure reduces assembly steps and simplifies the assembly process. For large-scale production of battery cells 20, it can improve assembly efficiency and reduce raw material waste. Since it is not necessary to manufacture the third insulating component 2334 and the sealing component 2331 separately and then connect or assemble them, it reduces scrap materials and unnecessary processing steps in the production process, thereby reducing manufacturing costs. The integrated molding of the third insulating component 2334 and the sealing component 2331 also helps to eliminate the problem of possible small gaps or loose connections between the third insulating component 2334 and the sealing component 2331, which can reduce the risk of failures such as poor sealing and reduce the probability of electrolyte leakage, thus improving the reliability of the battery cell 20.

[0284] In some embodiments of this application, referring to FIG3, the housing component 21 includes a housing 211 and a cover 212, the housing 211 having an opening and the cover 212 closing the opening; the first wall 201 is the cover 212, or a wall opposite to the housing 211 and the cover 212.

[0285] The housing 211 can refer to the main structure of the housing component 21, and its openings allow the electrode component 22 and electrolyte to enter and exit the housing component 21. The cover 212 can refer to a plate-like structural component, which together with the housing 211 forms the housing component 21.

[0286] The first wall 201 can refer to the cover 212 or a shell wall of the shell 211, and is the shell wall opposite to the cover 212. Optionally, the shape of the shell 211 can be, but is not limited to, a square shell, a cylindrical shell, etc.

[0287] In the above technical solution, by setting the first wall 201 on the wall opposite to the cover 212 or the housing 211, more options can be provided for the setting position of the pole component 23, which can increase the design flexibility of the battery cell 20 to meet different usage requirements.

[0288] This application provides a battery device 100, including a battery cell 20 as described in any of the preceding embodiments.

[0289] In the above technical solution, since the battery cell 20 has high reliability, the reliability of the battery device 100 using the battery cell 20 can be improved, so that the battery device 100 can have better performance.

[0290] This application provides an electrical device 1000, including a battery cell 20 as described in any of the preceding embodiments, or a battery device 100 as described in any of the preceding embodiments, wherein the battery cell 20 or the battery device 100 is used to store or provide electrical energy.

[0291] In the above technical solution, since the battery cell 20 or battery device 100 can have high reliability, the reliability of the electrical device 1000 using the battery cell 20 or battery device 100 can be improved, and the electrical device 1000 can have better performance.

[0292] Example 1

[0293] Referring to Figures 3 to 10, a battery cell 20 provided according to an embodiment of this application includes a housing component 21, an electrode component 22, and a terminal component 23.

[0294] The housing component 21 includes a housing 211 and a cover 212. The housing 211 has an opening, and the cover 212 is closed and open. The walls of the housing 211 and the cover 212 opposite to each other form a first wall 201. The first wall 201 is provided with a mounting hole 201a.

[0295] The electrode component 22 is housed within the housing component 21.

[0296] The electrode component 23 is installed at the mounting hole 201a and includes an electrode body 231, a transition structure 232 and an insulating sealing structure 233. The electrode body 231 is connected to the electrode component 22, and the transition structure 232 is arranged circumferentially around the electrode body 231.

[0297] The transition structure 232 is welded to the first wall 201 and includes a connecting arm 2321, and cantilever 2322 and cross arm 2323 connected to both ends of the connecting arm 2321. The cantilever 2322 is farther away from the first wall 201 than the cross arm 2323. The connecting arm 2321 is perpendicular to the first wall 201. The cantilever 2322 includes a root portion 23221 and a beam portion 23222. The beam portion 23222 is connected to the connecting arm 2321 through a rounded transition at the root portion 23221. The beam portion 23222 is bent towards the first wall 201 relative to the root portion 23221.

[0298] The pole body 231 includes a main body 2311 and a skirt 2312 connected together. The skirt 2312 is arranged around the circumference of the main body 2311. The skirt 2312 includes a first section 2301 and a second section 2302. The first section 2301 is connected to the main body 2311, and the second section 2302 is connected to the end of the first section 2301 away from the main body 2311, and is bent towards the cantilever 2322 relative to the first section 2301.

[0299] The insulating sealing structure 233 includes a sealing element 2331, a first insulating element 2332, and a second insulating element 2333. The sealing element 2331 is a sealing ring with an L-shaped cross section, and the first insulating element 2332 and the second insulating element 2333 are both injection molded parts.

[0300] Along the thickness direction of the first wall 201, the cantilever 2322 and the cross arm 2323 form a clamping groove. The cross arm 2323 is clamped to the skirt portion 2312 by the sealing member 2331. The connecting arm 2321 and the cantilever 2322 are clamped to the skirt portion 2312 by the first insulating member 2332, and the cantilever 2322 is also clamped to the periphery of the main body portion 2311 by the first insulating member 2332. The second insulating member 2333 wraps around the outer peripheral side of the connecting arm 2321 and the cantilever 2322.

[0301] Example 2

[0302] Referring to Figures 11 and 12, the structure of the battery cell 20 provided in Embodiment 2 is largely the same as that of the battery cell 20 in Embodiment 1, except that:

[0303] The side of the skirt 2312 near the cantilever 2322 is recessed to form a bent structure.

[0304] In the cantilever 2322, the root 23221 is arc-shaped and connects the connecting arm 2321 and the beam 23222.

[0305] Example 3

[0306] Referring to Figures 13 and 14, the structure of the battery cell 20 provided in Embodiment 3 is largely the same as that of the battery cell 20 in Embodiment 1, except that:

[0307] In the skirt edge 2312, the second segment 2302 is perpendicular to the first segment 2301.

[0308] The cantilever 2322 includes a root portion 23221, a beam portion 23222, and a bending portion 23223. The beam portion 23222 is connected to the connecting arm 2321 by an arc transition through the root portion 23221. The bending portion 23223 is located at the end of the beam portion 23222 away from the root portion 23221 and bends towards the first wall 201.

[0309] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0310] The above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, wherein, include: The housing component includes a first wall, the first wall being provided with mounting holes; The electrode components are housed within the housing components; An electrode component is installed at the mounting hole and includes an electrode body, a connecting structure, and an insulating sealing structure. The electrode body is connected to the electrode component. The connecting structure is circumferentially arranged around the electrode body and connected to the first wall. The insulating sealing structure is insulating and sealingly fitted between the electrode body and the connecting structure. The adapter structure includes a connecting arm and a cantilever and a cross arm connected to both ends of the connecting arm, with the cantilever being farther away from the first wall relative to the cross arm; the pole body includes a connected main body and a skirt, with the skirt circumferentially surrounding the main body and bent toward the cantilever; along the thickness direction of the first wall, the cantilever and the cross arm clamp the skirt through the insulating sealing structure.

2. The battery cell according to claim 1, wherein, The skirt portion includes a first section and a second section. The first section is connected to the main body portion, and the second section is connected to the end of the first section away from the main body portion and is bent relative to the first section toward the cantilever.

3. The battery cell according to claim 1, wherein, The skirt edge has at least two bends.

4. The battery cell according to claim 3, wherein, The skirt portion includes a first section, a second section, and a third section. The first section connects to the main body portion, the second section connects the first section and the third section and bends relative to the first section toward the cantilever, and the third section bends relative to the second section toward the first wall.

5. The battery cell according to claim 2 or 4, wherein, The first section is perpendicular to the main body.

6. The battery cell according to any one of claims 2, 4, and 5, wherein, Along the thickness direction of the first wall, the thickness of the second segment is H1, and along the thickness direction of the connecting arm, the length of the second segment is L1, wherein H1 and L1 satisfy the following formula: y = -(P·L1) 4 ) / 8E(b·H1 3 / 12) Where y is the deflection of the second section, which should be less than 25% of the compression of the insulating sealing structure, in mm; P is the maximum rebound force of the insulating and sealing structure after compression, in N; E is the elastic modulus of the second section, in GPa. b is the circumference of the second section in the circumferential direction of the pole body, in mm.

7. The battery cell according to any one of claims 2, 4 to 6, wherein, The angle between the first segment and the second segment is θ1, where 90 degrees ≤ θ1 < 180 degrees.

8. The battery cell according to claim 7, wherein, 125 degrees ≤ θ1 ≤ 145 degrees.

9. The battery cell according to claim 4, wherein, The angle between the second segment and the third segment is θ2, where 90 degrees ≤ θ2 < 180 degrees.

10. The battery cell according to claim 9, wherein, 125 degrees ≤ θ2 ≤ 145 degrees.

11. The battery cell according to any one of claims 1 to 10, wherein, The first wall has an outer wall surface away from the electrode component. Along the thickness direction of the first wall, the connecting arm forms a first projection on the plane where the outer wall surface is located, and the cantilever forms a second projection on the plane where the outer wall surface is located. In the thickness direction of the connecting arm, the size of the first projection is smaller than the size of the second projection.

12. The battery cell according to any one of claims 1 to 11, wherein, The connecting arm is perpendicular to the first wall.

13. The battery cell according to any one of claims 1 to 12, wherein, The cantilever includes a root and a beam, the beam being connected to the connecting arm via a rounded transition at the root; the insulating sealing structure includes a seal, the seal being at least partially insulating and sealingly fitted between the crossarm and the skirt.

14. The battery cell according to claim 13, wherein, The beam portion is inclined or bent relative to the root portion towards the first wall.

15. The battery cell according to claim 14, wherein, The included angle between the root and the beam is θ3, where 90 degrees ≤ θ3 < 180 degrees.

16. The battery cell according to claim 15, wherein, 125 degrees ≤ θ3 ≤ 145 degrees.

17. The battery cell according to any one of claims 1 to 12, wherein, The cantilever includes a root and a beam, the root being arc-shaped and connecting the connecting arm and the beam; the insulating sealing structure seal is at least partially insulating and sealingly fitted between the cross arm and the skirt.

18. The battery cell according to claim 17, wherein, The beam portion is inclined or bent relative to the root portion towards the first wall, and the included angle between the beam portion and the connecting arm is θ4, where θ4 < 90 degrees.

19. The battery cell according to claim 18, wherein, 45 degrees ≤ θ4 < 90 degrees.

20. The battery cell according to any one of claims 1 to 12, wherein, The cantilever includes a root, a beam, and a bend. The beam is connected to the connecting arm via an arc transition at the root. The bend is located at the end of the beam away from the root and bends towards the first wall. The insulating and sealing structure includes a seal, which is at least partially insulating and sealingly fitted between the cross arm and the skirt.

21. The battery cell according to claim 20, wherein, The beam portion is inclined or bent relative to the root portion towards the first wall, and the included angle between the beam portion and the connecting arm is θ5, wherein 85 degrees ≤ θ5 ≤ 95 degrees.

22. The battery cell according to claim 21, wherein, The included angle between the beam and the bent portion is θ6, where 85 degrees ≤ θ6 ≤ 95 degrees.

23. The battery cell according to any one of claims 13 to 22, wherein, The first wall has an outer wall surface away from the electrode component, and along the thickness direction of the first wall, the projection of the root onto the plane of the outer wall surface and the projection of the seal onto the plane of the outer wall surface at least partially overlap.

24. The battery cell according to any one of claims 1 to 23, wherein, The side of the skirt facing away from the cantilever forms a gap with the insulating sealing structure and the transition structure.

25. The battery cell according to any one of claims 1 to 24, wherein, The adapter structure is an integrally molded part, and includes a pre-formed part and a riveting part. The pre-formed part is connected to the first wall and includes the cross arm. The riveting part is connected to the pre-formed part and includes the connecting arm and the cantilever. And / or, The adapter structure is integrally formed with the housing component.

26. The battery cell according to any one of claims 1 to 25, wherein, The cross arm includes an outer annular surface facing the skirt portion, and the insulating sealing structure includes a seal, the seal including a first sealing portion, the first sealing portion being insulating and sealingly fitted between the outer annular surface and the skirt portion.

27. The battery cell according to claim 26, wherein, The cross arm includes an inner annular surface surrounding the pole body, and the seal includes a second sealing portion that is insulated and sealably fitted between the inner annular surface and the pole body, and connects to the first sealing portion.

28. The battery cell according to any one of claims 1 to 27, wherein, The insulating and sealing structure includes a sealing element and a first insulating element. The cross arm and the skirt portion are insulated and sealed together by the sealing element. The connecting arm and the cantilever are insulated and connected to the pole body by the first insulating element.

29. The battery cell according to claim 28, wherein, The first insulating component is injection molded between the connecting arm, the cantilever, and the pole body.

30. The battery cell according to claim 28 or 29, wherein, The sealing element and the first insulating element are integrally molded parts.

31. The battery cell according to any one of claims 28 to 30, wherein, The insulating sealing structure includes a second insulating element that covers the outer peripheral surfaces of the connecting arm and the cantilever.

32. The battery cell according to claim 31, wherein, The second insulating component, the first insulating component, and the sealing component are integrally molded.

33. The battery cell according to any one of claims 1 to 32, wherein, The insulating and sealing structure includes a sealing element and a third insulating element. The cross arm and the skirt portion are insulated and sealed together by the sealing element. The third insulating element is located on the side of the adapter structure near the electrode component and is sealed together with the sealing element.

34. The battery cell according to claim 33, wherein, The third insulating component and the sealing component are integrally molded.

35. The battery cell according to any one of claims 1 to 34, wherein, The housing component includes a housing and a cover, the housing having an opening and the cover closing the opening; The first wall is the cover, or the wall of the shell opposite the cover.

36. A battery device, wherein, Includes the battery cell as described in any one of claims 1 to 35.

37. An electrical appliance, wherein, Includes a battery cell as described in any one of claims 1 to 35, or a battery device as described in claim 36, wherein the battery cell or the battery device is used to store or provide electrical energy.

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