Battery cell, battery device, and electric device

Abstract

A battery cell, a battery device, and an electric device. The battery cell comprises a housing component, an electrode component and a terminal component, wherein the electrode component is arranged in the housing component, the housing component comprises a first housing wall, and the terminal component is arranged on the first housing wall and comprises: a terminal body connected to the electrode component; a clamping structure surrounding the terminal body and connected to the first housing wall; and an insulating sealing structure fitted between the clamping structure and the terminal body. The clamping structure comprises a first clamping member and a second clamping member, at least one of which is bent towards the other so as to jointly form a clamping groove; the clamping groove clamps the terminal body, the clamping groove is formed with an opening, and the clamping groove is constricted at the opening; and in the direction of thickness of the first housing wall, the ratio of the minimum dimension of the opening to the maximum dimension of the clamping groove is less than 90%.

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 performance and service life of the battery cell and the battery device.

[0005] In a first aspect, embodiments of this application provide a battery cell, including a housing component, an electrode component, and a terminal component. The electrode component is disposed within the housing component, and the housing component includes a first housing wall. The terminal component is disposed within the first housing wall and includes: a terminal body connected to the electrode component; a clamping structure surrounding the terminal body and connected to the first housing wall; and an insulating and sealing structure insulatingly and sealingly fitted between the clamping structure and the terminal body. The clamping structure includes a first clamping member and a second clamping member connected together. At least one of the first clamping member and the second clamping member is bent toward the other to jointly form a clamping groove. The clamping groove clamps the terminal body, and the clamping groove has an opening. The clamping groove tightens at the opening to prevent the terminal body from dislodging from the opening. Along the thickness direction of the first housing wall, the ratio of the minimum size of the opening to the maximum size of the clamping groove is less than 90%.

[0006] In the above technical solution, the electrode post component with the above structure can be fixed by the insulating sealing structure and the clamping structure, and then connected to the first shell wall of the housing component through the clamping structure. This reduces the risk of contact between the electrode post body and the housing component during battery cell assembly, lowers the probability of damage to the electrode post body, helps ensure the integrity of the electrode post body, improves the reliability of overcurrent protection of the electrode post body, and enhances the reliability of the battery cell. The clamping groove formed by the first and second clamping members can clamp the insulating sealing structure and the electrode post body more securely, making the clamping structure less likely to be pried open. This improves the installation reliability of the insulating sealing structure and the electrode post body, enhances the overall stability of the electrode post component, and increases the compression of the insulating sealing structure, improving the insulation and sealing between the clamping structure and the electrode post body, thereby improving the reliability of the electrode post component and, consequently, the reliability of the battery cell.

[0007] In some embodiments of this application, the first clamping member includes a first arm, a second arm, and a third arm that are bent and connected in sequence. The first arm is connected to the second clamping member and extends away from the second clamping member. At least one of the second arm and the third arm extends towards the second clamping member. The first arm, the second arm, and the third arm together form a clamping groove with the second clamping member. The end of the third arm away from the second arm and the end of the second clamping member away from the first arm together form a slot.

[0008] In the above technical solution, because the first arm, second arm, and third arm are bent and connected in sequence, the first clamping member can form a clamping groove that is wider inside and narrower outside. The inner space of the clamping groove is relatively ample, allowing the electrode post body to be closer to the inner side of the clamping groove. Therefore, the size of the part where the electrode post body and the clamping groove are joined is larger, which can improve the installation reliability of the electrode post body. Using this structure also allows for a more compact arrangement between the electrode post body and the clamping groove, reducing the volume of the electrode post component and thus improving the volumetric energy density of the battery cell.

[0009] In some embodiments of this application, the second arm is disposed parallel to the first shell wall, and the second arm is bent and connected to both the first arm and the third arm; or, the second arm is an arc-shaped arm that is bent and connected to the first arm and the third arm.

[0010] In the above technical solution, the first clamping member adopts the aforementioned bending structure, which improves its strength and rigidity. When the electrode body is subjected to a force from the electrode component towards the first shell wall, the first clamping member has a better resistance to deformation, reducing the probability of large deformation causing the electrode body to detach from the clamping structure, thus improving the overall reliability of the electrode component. Moreover, the above structure can provide more implementation schemes for the first clamping member, increasing design flexibility and helping to meet different product requirements.

[0011] In some embodiments of this application, the third arm is set at an angle relative to both the first arm and the first shell wall; or, the third arm is set parallel to the first arm and at an angle to both the first shell wall.

[0012] In the above technical solution, by setting the third arm at an angle relative to both the first arm and the first shell wall, the bending structure of the first clamping component is simplified, reducing molding difficulty, improving manufacturability, and increasing product yield. By setting the third arm parallel to the first arm and at an angle to the first shell wall, the distance between the third and first arms is minimized. This requires the first arm to undergo greater positional deformation relative to the third arm to detach the electrode post from the clamping structure. This increases the difficulty of detaching the electrode post from the clamping structure, thereby improving the clamping reliability of the electrode post and ultimately enhancing the overall reliability of the electrode post, and consequently, the reliability of the individual battery cells.

[0013] In some embodiments of this application, the first arm is disposed perpendicular to the first shell wall.

[0014] In the above technical solution, the structure in which the first arm is perpendicular to the first shell wall reduces the compressive force arm of the clamping structure on the insulating and sealing structure, enhances the compressive effect of the first clamping member on the insulating and sealing structure, improves the insulation and sealing effect, and helps improve the insulation and sealing reliability of the insulating and sealing structure, thereby improving the overall reliability of the battery cell. Furthermore, this structure allows for a more compact clamping structure, resulting in a more compact overall structure of the electrode post component. This allows the side of the electrode post body furthest from the electrode component to have a larger surface area, increasing the current-carrying capacity of the electrode post body and thus improving the charge and discharge performance of the battery cell.

[0015] In some embodiments of this application, the second clamping member includes a fourth arm, which is parallel to the first shell wall and together with the first clamping member forms a clamping groove.

[0016] In the above technical solution, the fourth arm is relatively close to the inner side of the housing component. By making the fourth arm parallel to the first housing wall, the fourth arm can be arranged more compactly inside the housing component, saving internal space. This is beneficial to increasing the size of the electrode component and improving the volumetric energy density of the battery cell.

[0017] In some embodiments of this application, the second clamping member further includes a fifth arm portion, which is bent and connected to the fourth arm portion and extends toward the first clamping member.

[0018] In the above technical solution, because the third arm is bent relative to the second arm, and the fifth arm is bent and connected to the fourth arm, both the first and second clamping members can form protruding structures facing each other. This further increases the clamping force on the electrode body and improves the installation reliability of the electrode body. Using this structure, on the one hand, it further increases the compressive force on the insulating sealing structure, increases the compression amount of the insulating sealing structure, and improves the insulation and sealing performance between the electrode body and the clamping structure. On the other hand, the protruding structures formed by the first and second clamping members increase the complexity of the insulation and sealing path of the insulating sealing structure, which helps to increase the contact surface between the insulating sealing structure and the first and second clamping members. This also enhances the insulation and sealing performance between the electrode body and the clamping structure, reduces the risk of electrolyte leakage from the electrode components, and improves the reliability of the battery cell.

[0019] In some embodiments of this application, the fifth arm is perpendicular to the first shell wall.

[0020] In the above technical solution, since the fourth arm is parallel to the first shell wall, and the fifth arm is perpendicular to the first shell wall, it can be understood that the fifth arm is perpendicular to the fourth arm. Using this method, the overall structure of the second clamping member is more compact, and the size of the fifth arm can be made smaller, which helps save space and reduce the overall volume of the electrode post component. On the other hand, since the fifth arm is perpendicular to the fourth arm, the second clamping member can form a vertical structure, which can improve the overall strength and rigidity of the second clamping member, enhance its fixing effect on the insulation sealing structure and the electrode post body, improve the overall reliability of the electrode post component, and thus improve the overall reliability of the battery cell.

[0021] In some embodiments of this application, the electrode post body includes a main body and an edge portion connecting the main body, with the edge portion located within a clamping groove. In this technical solution, the edge portion of the electrode post body is clamped and engaged with the clamping groove formed by the clamping structure, while the main body is exposed outside the clamping groove to connect with other conductive components such as busbars. Furthermore, the main body is easily kept flush with the surface of the clamping structure away from the first shell wall, or maintains a small height difference. This facilitates a more regular overall shape of the electrode post component and makes it easier to connect the electrode post body with other connecting components such as busbars, wires, or terminals.

[0022] In some embodiments of this application, the edge portion is bent relative to the main body portion. This bending of the edge portion relative to the main body portion increases the overall strength and rigidity of the edge portion, which is beneficial for improving the strength and rigidity of the structure formed after the edge portion and the clamping structure are combined, thus improving the overall reliability of the electrode post component. Because the edge portion has a bent position, this method increases the complexity of the insulation sealing path at the junction of the insulation sealing structure and the edge portion, increasing the contact area and thereby enhancing the insulation and sealing between the clamping structure and the edge portion. This reduces the risk of electrolyte leakage at the electrode post component location and also helps improve the reliability of the individual battery cells.

[0023] In some embodiments of this application, the edge portion is at least partially arranged parallel to the third arm portion.

[0024] In the above technical solution, by setting the edge portion at least partially parallel to the third arm portion, and the distance between the edge portion and the third arm portion is relatively small, the compression amount of the insulating sealing structure located between the edge portion and the third arm portion can be kept consistent, and it is beneficial to maintain a large compression amount, which can improve the stability and reliability of insulation and sealing, reduce the risk of electrolyte leakage, and improve the reliability of battery cells.

[0025] In some embodiments of this application, a first recess is formed on the edge portion, and the third arm portion mates with the first recess.

[0026] In the above technical solution, the third arm engages with the first recess through an insulating and sealing structure, thereby enabling a tighter fit between the first clamping member and the edge portion. This enhances the clamping strength of the clamping structure on the edge portion and improves the installation reliability of the electrode body. The first recess also increases the complexity of the contact surface between the edge portion and the insulating and sealing structure, and increases the contact area. This enhances the insulation and sealing performance of the insulating and sealing structure between the edge portion and the first clamping member, thus also improving the reliability of the battery cell.

[0027] In some embodiments of this application, the third arm protrudes relative to the second arm toward the side closer to the first recess, and is insulated from and sealed to the first recess through an insulating and sealing structure.

[0028] In the above technical solution, by protruding the third arm relative to the second arm towards the side closer to the first recess, the distance between the third arm and the first recess is reduced. This further clamps the insulating sealing structure and the edge portion, improving the installation reliability of the insulating sealing structure and the terminal body, thereby improving the overall reliability of the terminal component. Since the first recess increases the complexity and area of ​​the contact surface between the edge portion and the insulating sealing structure, the above structure further increases the complexity and area of ​​the contact surface between the insulating sealing structure and the first clamping member. This further enhances the insulating sealing structure at the first clamping member and the edge portion, improving the insulation and sealing performance of the terminal component, and ultimately improving the overall reliability of the battery cell.

[0029] In some embodiments of this application, a second recess is further formed on the edge portion, and the second clamping member mates with the second recess. In the above technical solution, the second clamping member can mate with the second recess through an insulating sealing structure, thereby making the connection between the second clamping member and the edge portion tighter, enhancing the clamping strength of the second clamping member on the edge portion, and improving the installation reliability of the electrode body. The second recess also increases the complexity of the contact surface between the edge portion and the insulating sealing structure, and increases the contact surface area, thereby enhancing the insulation and sealing performance of the insulating sealing structure between the edge portion and the second clamping member, and thus also improving the reliability of the battery cell.

[0030] In some embodiments of this application, the second clamping member includes a fourth arm and a fifth arm connected together. The fourth arm is connected to the first arm, and the fifth arm protrudes toward the side near the second recess and is insulated from and sealed to the second recess through an insulating and sealing structure.

[0031] In the above technical solution, the fifth arm can form a protruding structure of the second clamping member, and can be connected to the second recessed part of the edge through an insulating and sealing structure. This structure allows for an interlocking connection between the second clamping member and the edge, improving the connection strength and reliability. Furthermore, this structure makes the insulation and sealing path between the second clamping member and the edge more tortuous, forming an "S"-shaped structure. This increases the complexity and area of ​​the contact surfaces between the insulating and sealing structure, the second clamping member, and between the insulating and sealing structure and the edge, thereby improving the overall insulation and sealing of the terminal post component, and ultimately enhancing the overall reliability of the battery cell.

[0032] In some embodiments of this application, the local thickness of the edge portion is reduced to form a first recess and / or a second recess. In the above technical solutions, forming the first recess and / or the second recess in this manner facilitates processing and manufacturing, improves manufacturability, increases production efficiency, and reduces costs.

[0033] In some embodiments of this application, the insulating sealing structure includes a first sealing element, which is sealed between the second clamping member and the electrode body. In the above technical solution, the first sealing element can play a sealing role between the second clamping member and the electrode body, reducing the risk of electrolyte leakage between the second clamping member and the electrode body, thereby improving the sealing performance of the electrode component and thus improving the reliability of the battery cell.

[0034] In some embodiments of this application, the first sealing member includes a first part and a second part that are bent and connected, the pole body includes a main body and an edge part, the first part is sealed between the main body and the second clamping member, and the second part is sealed between the edge part and the second clamping member.

[0035] In the above technical solution, the first part can provide a sealing effect between the main body and the second clamping member, and the second part can provide a sealing effect between the edge part and the second clamping member. This allows the first sealing member to have a larger sealing surface, enhancing the sealing performance between the second clamping member and the terminal body. Furthermore, the above structure makes the first sealing member L-shaped, which also increases the contact surface with the second clamping member and allows for a tighter fit. This improves the installation reliability of the first sealing member and the second clamping member, reduces the risk of displacement or detachment of the first sealing member during assembly, and thus improves the sealing reliability of the terminal component, thereby enhancing the overall reliability of the battery cell.

[0036] In some embodiments of this application, the electrode post component further includes an insulating structure that is insulatingly disposed between the electrode post body and the electrode component, and the second part is integrally disposed with the insulating structure.

[0037] In the above technical solution, the insulating structure provides an effective insulating barrier on the side of the electrode body near the electrode components, isolating the electrode body and the electrode components, reducing the risk of short circuits, and improving the stability and reliability of the battery cell. The insulating structure also acts as a barrier, preventing electrolyte from flowing to the electrode components, reducing the risk of electrolyte leakage, and helping to maintain a clean environment inside the casing components, ensuring the normal operation of the chemical reactions inside the battery cell. The insulating structure also acts as a buffer between the first casing wall and the electrode components, reducing the probability of impact damage to the electrode components and improving the reliability of the battery cell. By integrating the second part with the insulating structure, the installation of the first seal and the insulating structure is simplified, reducing assembly steps and improving the production efficiency of the battery cell.

[0038] In some embodiments of this application, the insulating sealing structure further includes a second sealing element, which is sealed between the first clamping member and the pole body, and the second sealing element is spaced apart from the first sealing element.

[0039] In the above technical solution, the second seal acts as the first sealing line between the terminal body and the clamping structure, while the first seal acts as the second sealing line. The cooperation between the second and first seals provides more comprehensive sealing protection, further reducing the risk of electrolyte leakage from the terminal component and the risk of external impurities such as water and dust entering the terminal component. This improves the sealing reliability of the terminal component and consequently enhances the reliability of the battery cell. The spaced arrangement of the second and first seals provides the necessary space for their expansion and deformation, allowing for the storage of compressed gas. This reduces the likelihood of damage to the clamping structure due to gas, improving the reliability of the terminal component and minimizing the risk of released gas contaminating the electrolyte. This ensures the stability of the internal chemical reactions of the battery cell and further enhances its reliability.

[0040] In some embodiments of this application, the insulating sealing structure further includes an insulating element, which includes a first insulating portion disposed between the first clamping member and the pole body.

[0041] In the above technical solution, the first insulating part can play an insulating role between the first clamping member and the electrode body, reducing the risk of short circuit or other electrical safety accidents. Moreover, the first insulating part can also play a sealing role before the first sealing member. The first insulating member serves as a sealing defense line, and the first sealing member serves as another sealing defense line, thus playing a dual protection role, reducing the probability of electrolyte seeping out from the inside of the casing components, and effectively resisting the intrusion of moisture and dust, thereby improving the reliability of the battery cell.

[0042] In some embodiments of this application, the insulating member further includes a second insulating portion disposed on the outer surface of the first clamping member opposite to the clamping groove and connected to the first insulating portion.

[0043] In the above technical solution, the structure described above provides circumferential insulation protection on the outer side of the electrode post 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. Secondly, the second insulating part can also form a protective layer around the first clamping member, which can act as a buffer and vibration damping layer, thereby reducing the impact on the electrode post body, lowering the probability of damage to the electrode post body, and improving the reliability of the battery cell.

[0044] In some embodiments of this application, the electrode body includes an outer protrusion of the electrode located in the inner ring region of the first clamping member. The outer protrusion of the electrode protrusion protrudes outward relative to the first clamping member toward the outer side of the first shell wall. The side surface of the outer protrusion of the electrode away from the electrode component includes a central region and a peripheral region. The peripheral region is disposed around the central region. The central region protrudes outward relative to the peripheral region toward the outer side of the first shell wall. The side surface of the second insulating portion away from the electrode component is flush with the peripheral region.

[0045] In the above technical solution, on the side of the protruding electrode portion away from the electrode component, the central region protrudes outward relative to the peripheral region towards the outside of the first housing wall. This results in less peripheral obstruction of the central region, making it easier for it to connect to other electrical components such as busbars and terminals. By aligning the side of the second insulating portion away from the electrode component with the peripheral region, the likelihood of a significant height difference between the protruding electrode portion and the second insulating portion is reduced. This reduces the risk of short circuits caused by accidental foreign objects falling into the height difference between the protruding electrode portion and the second insulating portion during the use or handling of the battery cell. It also reduces the likelihood of stress concentration due to the height difference, thus improving the reliability of the battery cell.

[0046] In some embodiments of this application, the first insulating portion and the second insulating portion are either integrally formed or separately formed. In the above technical solutions, the first insulating portion and the second insulating portion are integrally formed, which reduces the number of parts, reduces assembly steps, and improves assembly efficiency. If the first insulating portion and the second insulating portion are separately formed, it is easier to control the quality of the first insulating portion and the second insulating portion, which reduces maintenance difficulty and is beneficial for controlling product quality.

[0047] In some embodiments of this application, a first insulating portion is injection molded between a first clamping member and an electrode body; and / or, a second insulating portion is injection molded on the outer surface of the first clamping member opposite to the clamping groove.

[0048] In the above technical solution, by injection molding the first insulating portion between the first clamping member and the electrode body, the installation of the first insulating portion, the first clamping member, and the electrode body is easier, saving time and improving assembly efficiency. It also helps reduce the gaps between the first insulating portion, the first clamping member, and the electrode body, reducing the risk of electrolyte leakage, and improves the bonding strength among the three components, thereby enhancing the overall connection reliability of the electrode assembly. Similarly, by injection molding the second insulating portion onto the outer surface of the first clamping member away from the clamping groove, the installation of the second insulating portion on the first clamping member is easier, saving time and improving assembly efficiency. It also helps reduce the gaps between the second insulating portion and the first clamping member, reducing the risk of electrolyte leakage, and improves the bonding strength between the second insulating portion and the first clamping member, thereby enhancing the overall connection reliability of the electrode assembly.

[0049] In some embodiments of this application, a first insulating portion is injection molded between a first clamping member and an electrode body, and a second insulating portion is injection molded on the outer surface of the first clamping member away from the clamping groove; the first clamping member has a through hole, and a portion of the second insulating portion passes through the through hole and is connected to the first insulating portion.

[0050] In the above technical solution, the first insulating part and the second insulating part can be an integral piece. When the first insulating part and the second insulating part are integrally injection molded, the injection molding liquid can form the second insulating part on the outer surface of the first clamping member away from the clamping groove. At the same time, a portion of the injection molding liquid enters from the outside of the first clamping member between the first clamping member and the electrode body, and another portion of the injection molding liquid directly enters from the perforation between the first clamping member and the electrode body, thereby forming the first insulating part. This method can increase the flow rate of the injection molding liquid, thereby improving molding efficiency and saving time.

[0051] In some embodiments of this application, the first clamping member and the second clamping member are integrally formed; and / or, the first clamping member, the second clamping member, and the first shell wall are all integrally formed.

[0052] In the above technical solution, the first and second clamping components are integrally molded, resulting in good overall consistency, high strength and rigidity, and good reliability. This also reduces the number of parts in the terminal post assembly, improving assembly efficiency. Furthermore, the integral molding of the first and second clamping components and the first housing wall further reduces the number of parts, simplifies the assembly process, and improves assembly efficiency. The seamless connection between the first and second clamping components and the first housing wall reduces sealing failure paths and improves the reliability of the battery cell.

[0053] In some embodiments of this application, the clamping structure includes an inner ring segment and an outer ring segment surrounding the inner ring segment. The outer ring segment is connected to a first shell wall, a portion of the inner ring segment forms a second clamping member, and another portion is riveted to form a first clamping member.

[0054] In the above technical solution, the clamping structure is an integrally formed part, and the first clamping part and the second clamping part can be formed by riveting. As a result, the overall consistency of the clamping structure is relatively good and the connection gaps are fewer. This can enhance the connection strength between the clamping structure and the pole body, reduce the risk of loosening, and the riveting and pressing method can also form a good sealing effect, further improving the sealing performance between the clamping structure and the pole body, which is conducive to improving the reliability of the clamping structure and thus improving the reliability of the pole component.

[0055] In some embodiments of this application, the length of the second clamping member in the direction from the first shell wall to the pole body is L1, and the thickness of the second clamping member is H1, satisfying the relationship: y = -(P·L1) 4 ) / 8E(b·H1 3 / 12);

[0056] Where y is the deflection of the second clamping member, which should be less than 25% of the compression of the insulating sealing structure, in mm;

[0057] P represents the maximum rebound force of the insulating and sealing structure after compression, expressed in N.

[0058] E is the elastic modulus of the second clamping component, in GPa.

[0059] b is the circumference of the second clamping member in the circumferential direction of the pole body, in mm.

[0060] In the above technical solution, the thickness and length of the second clamping member can be calculated by using the above formula, thereby giving the second clamping member high strength and rigidity. This reduces the probability of the second clamping member undergoing large deformation when the electrode body is subjected to force, and also reduces the probability of the electrode body coming off the second clamping member. This improves the reliability of the insulation and sealing structure between the clamping structure and the electrode body, reduces the risk of insulation and sealing failure, and improves the reliability of the battery cell.

[0061] In some embodiments of this application, the first clamping member includes a plurality of riveted portions spaced apart along the direction surrounding the pole body, with intermittent gaps formed between adjacent riveted portions. In this technical solution, the first clamping member fixes the pole body by riveting. Since the first clamping member surrounds the pole body, the intermittent gaps formed between adjacent riveted portions can improve the problem of material accumulation or bulging at the corners when riveting the riveted portions, thus preventing bulges on the first clamping member. This is beneficial for improving the regularity of the clamping structure and for injection molding overmolding.

[0062] In some embodiments of this application, the outline of the pole body is racetrack-shaped, which is composed of a rectangle and two semicircles located at both ends of the length of the rectangle. The riveting part includes a first riveting part located at both ends of the length of the pole body and a second riveting part located at both ends of the width of the pole body. An intermittent notch is formed between the first riveting part and the second riveting part and is positioned opposite to the connection position of the rectangle and the semicircles.

[0063] In the above technical solution, the number of the first and second riveting parts formed by the above structure is small, and the strength and rigidity are relatively high. This is beneficial to improve the clamping strength of the first clamping member on the electrode body, improve the installation reliability of the clamping structure and the electrode body, and improve the effect of material stacking or bulging of the first clamping member during the riveting process. It can improve the regularity of the outer contour of the first clamping member, thereby improving the overall reliability of the battery cell.

[0064] In some embodiments of this application, the first clamping member is disposed on the side of the second clamping member away from the electrode component, and has an intermittent notch communicating with the clamping groove. In the above technical solution, the first clamping member can be disposed on the outer side of the first shell wall. By providing an intermittent notch communicating with the clamping groove, the first clamping member can be divided into multiple parts, which can reduce the molding difficulty of the first clamping member and thus improve manufacturability. By providing an intermittent notch, the weight of the first clamping member can also be reduced, which is beneficial to improving the energy density of the battery cell.

[0065] In some embodiments of this application, multiple discontinuous notches are spaced apart along the direction of the clamping structure surrounding the electrode body. In this technical solution, multiple discontinuous notches help reduce the forming difficulty of the clamping structure during manufacturing, improve the manufacturability of the clamping structure, increase product yield, and thus improve the product qualification rate of the battery cell. Multiple discontinuous notches can also significantly reduce the weight of the clamping structure, saving materials, reducing costs, and also increasing the energy density of the battery cell.

[0066] In some embodiments of this application, the insulating sealing structure includes an insulating member, which includes a first insulating portion and a second insulating portion. The first insulating portion is injection molded between the first clamping member and the pole body, and the second insulating portion is injection molded on the outer surface of the clamping groove formed by the first clamping member, and is partially connected to the first insulating portion through an intermittent notch.

[0067] In the above technical solution, during the injection molding process of the second insulating part onto the outer surface of the clamping groove formed by the first clamping member, the injection liquid can enter the gap between the first clamping member and the pole body through the intermittent notch to form the first insulating part. Thus, the first insulating part and the second insulating part can be injection molded at one time, simplifying the assembly process of the pole component. Moreover, the intermittent notch is a notch formed on the first clamping member. Compared with the simple opening method, the opening size of the intermittent notch is larger, which can improve the flow rate of the injection liquid, thereby improving the molding efficiency of the first insulating part and the second insulating part, and improving the overall assembly efficiency of the pole component.

[0068] In some embodiments of this application, the electrode body includes a first metal part and a second metal part made of different materials. The first metal part is located on the side of the second metal part away from the electrode component. The second metal part is connected to the electrode component. The outer periphery of the first metal part and the outer periphery of the second metal part adjacent to the first metal part are covered with a protective metal layer.

[0069] In the above technical solution, by setting the electrode body to include a first metal part and a second metal part with different materials, the electrode body can be made of a suitable metal as needed. For example, the first metal part and the second metal part can be made of metals with different conductivity. While ensuring the overall conductivity requirements, the cost can be reduced. Lighter metal materials can also be selected to reduce the overall weight of the electrode body and increase the energy density of the battery cell. Metal materials with different weldability can also be selected as needed, which is beneficial for welding the electrode body and other electrical connection components and improving the manufacturability of the battery cell.

[0070] In some embodiments of this application, the electrode body is a metal component made of the same material throughout. This technical solution simplifies the manufacture of the electrode body using this structure, thus reducing manufacturing costs.

[0071] In some embodiments of this application, the electrode post member defines a receiving groove recessed in a direction away from the electrode member, the electrode post body defines a groove end wall on the side of the receiving groove away from the electrode member, the electrode member includes an active material coating portion and a conductive portion, at least a portion of the conductive portion is received in the receiving groove and connected to the groove end wall.

[0072] In the above technical solution, since the conductive part of the electrode component needs to occupy a certain space, the receiving groove is defined by the electrode post component. At least part of the conductive part is housed in the receiving groove and connected to the end wall of the groove. Thus, the electrode post component can provide a receiving space for the conductive part, saving space in the housing component. This is beneficial for arranging a larger active material coating part in the housing component. Moreover, the receiving groove also helps to reduce the weight of the electrode post component, thereby improving the energy density of the battery cell.

[0073] In some embodiments of this application, the electrode body further includes an insulating structure disposed on the side of the clamping structure near the electrode component, and the insulating structure and the insulating sealing structure together define the groove peripheral wall of the receiving groove.

[0074] In the above technical solution, the periphery of the receiving groove is defined by the insulating structure and the insulating sealing structure, which can form a deeper receiving groove, providing more space to accommodate the conductive part and further saving space inside the housing component. Since both the insulating structure and the insulating sealing structure have an insulating function, the above structure can also insulate the conductive part and the electrode body, which helps to reduce the risk of short circuit and improve the reliability of the battery cell.

[0075] In some embodiments of this application, the electrode post body further includes an insulating structure disposed on the side of the clamping structure near the electrode component. The electrode post body includes an inner protrusion of the electrode post located in the inner ring region of the insulating structure. The inner protrusion of the electrode post protrudes inward toward the first shell wall relative to the clamping structure. The surface of the inner protrusion of the electrode post near the electrode component is flush with the surface of the insulating structure near the electrode component, or is located on the side of the insulating structure away from the electrode component.

[0076] In the above technical solution, forming an inner protrusion on the electrode post body allows for a larger bonding area between the electrode post body and the clamping structure, improving connection reliability and enhancing the overall stability and reliability of the electrode post component. By aligning the inner protrusion with the surface of the insulating structure closest to the electrode component, less obstruction is obstructed around the inner protrusion, making it easier to connect to the electrode component, reducing assembly difficulty, improving assembly efficiency, and increasing product yield. Furthermore, by positioning the inner protrusion on the side of the insulating structure furthest from the electrode component, a space can be formed between the insulating structure and the inner protrusion to accommodate the electrode component, thereby saving internal space in the casing and increasing the energy density of the battery cell.

[0077] In some embodiments of this application, the battery cell further includes a pressure relief device, which is located on the housing component and on the same side or opposite side as the terminal component.

[0078] In the above technical solution, by incorporating a pressure relief device into the casing component, pressure can be released promptly when the internal pressure of the casing component is high, reducing the risk of thermal runaway in individual battery cells and improving the reliability of the battery cells. The location of the pressure relief device on the same side or opposite side of the terminal post component allows for more possibilities in its placement, facilitating flexible design and reducing manufacturing costs.

[0079] Secondly, embodiments of this application provide a battery device including any of the battery cells mentioned above.

[0080] 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.

[0081] In some embodiments of this application, the battery device includes a housing, multiple battery cells are housed in the housing, the bottom of the housing is a housing bottom plate, and the terminal post is located on the side of the housing component near the housing bottom plate, or on the side of the housing component away from the housing bottom plate.

[0082] In the above technical solution, placing the battery cell's terminal post on the side of the casing component near the bottom plate of the housing helps lower the overall center of gravity of the battery device and facilitates heat dissipation for both the battery cells and the entire battery device, thereby improving the reliability of the battery device. Placing the terminal post on the side of the casing component away from the bottom plate of the housing facilitates internal electrical connections within the battery device, makes maintenance and repair easier, improves the battery device's waterproof and dustproof performance, and reduces the likelihood of battery cell damage from impacts to the bottom of the housing, further enhancing the reliability of the battery device.

[0083] Thirdly, embodiments of this application provide an electrical device, including the aforementioned battery device, which is used to store or provide electrical energy.

[0084] 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

[0085] 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.

[0086] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0087] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0088] Figure 3 is a schematic diagram of the internal structure of a battery cell provided in some embodiments of this application;

[0089] Figure 4 is a schematic diagram of the structure of the pole post component provided in some embodiments of this application;

[0090] Figure 5 is a partial structural schematic diagram of the clamping structure provided in some embodiments of this application;

[0091] Figure 6 is a structural schematic diagram of a pole post component provided in another embodiment of this application;

[0092] Figure 7 is a partial structural schematic diagram of the clamping structure provided in another embodiment of this application;

[0093] Figure 8 is a structural schematic diagram of the pole post component provided in another embodiment of this application;

[0094] Figure 9 is a partial structural schematic diagram of the clamping structure provided in another embodiment of this application;

[0095] Figure 10 is a three-dimensional structural diagram of a battery cell provided in some embodiments of this application;

[0096] Figure 11 is a schematic diagram of the internal structure of a battery cell provided in some other embodiments of this application;

[0097] Figure 12 is a schematic diagram of the internal structure of a battery cell provided in some other embodiments of this application;

[0098] Figure 13 is a schematic diagram of the internal structure of a battery cell provided in some other embodiments of this application;

[0099] Figure 14 is a schematic diagram of the internal structure of a battery cell provided in some other embodiments of this application;

[0100] Figure 15 is a schematic diagram of the structure of the pole body provided in some embodiments of this application;

[0101] Figure 16 is a schematic diagram of the structure of the pole body provided in another embodiment of this application;

[0102] Figure 17 is a schematic diagram of the structure of the pole body provided in another embodiment of this application;

[0103] Figure 18 is a partial structural schematic diagram of the pole post component provided in some embodiments of this application;

[0104] Figure 19 is a partial structural schematic diagram of the pole post component provided in another embodiment of this application;

[0105] Figure 20 is an exploded view of the pole post component before assembly according to some embodiments of this application;

[0106] Figure 21 is a three-dimensional structural assembly diagram of the pole body and clamping structure provided in some embodiments of this application;

[0107] Figure 22 is a three-dimensional structural schematic diagram of the clamping structure provided in some embodiments of this application;

[0108] Figure 23 is a schematic diagram of the internal structure of a battery cell provided in some other embodiments of this application;

[0109] Figure 24 is a schematic diagram of the assembly of a battery cell provided in some embodiments of this application;

[0110] Figure 25 is a schematic diagram of the assembly of a battery cell provided in some embodiments of this application.

[0111] icon:

[0112] 1000. Electrical appliances;

[0113] 100. Battery device;

[0114] 10. Box body; 11. First box body; 12. Second box body;

[0115] 20. Battery cell;

[0116] 21. Housing components;

[0117] 201, First shell wall; 201a, Mounting hole; 211, Shell; 212, Cover;

[0118] 22. Electrode components;

[0119] 221. Active material coating part; 222. Conductive part;

[0120] 23. Pole post components;

[0121] 231. Pole body;

[0122] 2311. Main body;

[0123] 2312, edge portion; 2312a, first recessed portion; 2312b, second recessed portion;

[0124] 2313, Outer protrusion of the pole post; 23101, Surface; 23131, Central region; 23132, Peripheral region;

[0125] 2314. The inner convex part of the pole;

[0126] 232. Clamping structure;

[0127] 2321, First clamping member; 2301, First arm; 2302, Second arm; 2303, Third arm; 2321a, Outer surface; 2321b, Through hole; 301, Riveting part; 3011, First riveting part; 3012, Second riveting part; 302, Intermittent notch; 303, Rectangular; 304, Semicircular; 305, First metal part; 306, Second metal part; 307, Protective metal layer;

[0128] 2322, Second clamping component; 2304, Fourth arm; 2305, Fifth arm;

[0129] 2323, clamping groove; 2323a, slot opening;

[0130] 2324, Inner Ring Road; 2325, Outer Ring Road;

[0131] 233. Insulating and sealing structure;

[0132] 2331. First seal; 2306. First part; 2307. Second part;

[0133] 2332. Second sealing element;

[0134] 2333, Insulating component; 2308, First insulating part; 2309, Second insulating part;

[0135] 234. Insulation structure;

[0136] 235. Receiving tank; 2351. Tank end wall; 2352. Tank peripheral wall;

[0137] 236. Compression arm; 237. Clearance;

[0138] 24. Pressure relief device;

[0139] 200, Controller; 300, Motor; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] In this application, "multiple" means two or more (including two).

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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 using a sealing element. However, in typical battery cells, the sealing element between the terminals and the casing is prone to failure, mainly due to two reasons: first, the compression of the sealing element 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 sealing failure and affecting the reliability of the battery cell.

[0155] Based on the above considerations, in order to address the problem that sealing failure easily occurs between the terminal and the casing, affecting the sealing performance of the battery cell's casing and the external environment, and thus affecting the reliability of the battery cell, the applicant has designed a battery cell, including: a casing component, an electrode component, and a terminal component. The electrode component is disposed within the casing component, and the casing component includes a first casing wall. The terminal component is disposed within the first casing wall and includes: a terminal body connected to the electrode component; a clamping structure surrounding the terminal body and connected to the first casing wall; and an insulating and sealing structure insulatingly and sealingly fitted between the clamping structure and the terminal body. The clamping structure includes a first clamping member and a second clamping member connected together. At least one of the first clamping member and the second clamping member bends towards the other to jointly form a clamping groove. The clamping groove clamps the terminal body, and the clamping groove has an opening, and the clamping groove tightens at the opening to prevent the terminal body from detaching from the opening. Along the thickness direction of the first casing wall, the ratio of the minimum size of the opening to the maximum size of the clamping groove is less than 90%.

[0156] In this type of battery cell, the terminal post component with the above-described structure can be clamped and fixed by an insulating and sealing structure and a clamping structure. The clamping structure then connects to the first shell wall of the housing component. This reduces the risk of contact between the terminal post and the housing component during battery cell assembly, lowers the probability of damage to the terminal post, helps ensure the integrity of the terminal post, improves current-carrying reliability, and consequently improves the reliability of the battery cell. The clamping structure described above, with its clamping groove formed by the first and second clamping members, can clamp the insulating and sealing structure and the terminal post more tightly. This improves the installation reliability of the insulating and sealing structure and the terminal post, enhances the overall stability of the terminal post component, increases the compression of the insulating and sealing structure, and improves the insulation and sealing between the clamping structure and the terminal post, thereby improving the reliability of the terminal post component and, consequently, the reliability of the battery cell.

[0157] 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, and can also be applied to power systems that use battery cells and battery devices disclosed in this application to form such electrical devices.

[0158] 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.

[0159] 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 for the electrical device 1000 provided in some embodiments of this application. 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.

[0160] 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.

[0161] 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.

[0162] 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 for electrical connection between the multiple battery cells 20.

[0163] 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.

[0164] 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 after discharge to activate the active materials and continue to be used. 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 cuboid.

[0165] According to some embodiments of this application, referring to Figures 3, 4, 6, 8, and 12 to 14, this application provides a battery cell 20, including a housing component 21, an electrode component 22, and a terminal component 23. The electrode component 22 is disposed within the housing component 21, and the housing component 21 includes a first housing wall 201. The terminal component 23 is disposed on the first housing wall 201 and includes: a terminal body 231, a clamping structure 232, and an insulating and sealing structure 233. The terminal body 231 is connected to the electrode component 22; the clamping structure 232 surrounds the terminal body 231 and is connected to the first housing wall 201; the insulating and sealing structure 233 is insulating and sealingly fitted between the clamping structure 232 and the terminal body 231. The clamping structure 232 includes a first clamping member 2321 and a second clamping member 2322 connected together. At least one of the first clamping member 2321 and the second clamping member 2322 is bent toward the other to form a clamping groove 2323. The clamping groove 2323 clamps the pole body 231. The clamping groove 2323 has a notch 2323a, and the clamping groove 2323 tightens at the notch 2323a to prevent the pole body 231 from coming out of the notch 2323a. The ratio of the minimum size of the notch 2323a to the maximum size of the clamping groove 2323 is less than 90% along the thickness direction of the first shell wall 201.

[0166] 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.

[0167] The first shell wall 201 can refer to one of the multiple shell walls of the shell component 21. For example, the shell 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 shell 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 shell component 21 is cylindrical, the peripheral wall is circular; when the shell component 21 is cuboid, the peripheral wall may include multiple side walls, and the first shell wall 201 can be one or more of the multiple side walls.

[0168] The explanation of electrode component 22 can be found in the previous text, and will not be repeated here.

[0169] 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.

[0170] The electrode body 231 refers 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 material of the electrode body 231 can be, but is not limited to, aluminum, copper, or copper-aluminum composite materials, etc., and the electrode body 231 can be made of one or more materials. For example, the electrode body 231 can be made entirely of aluminum or copper.

[0171] The clamping structure 232 can refer to a component that connects to the housing component 21 and serves to fix the pole body 231. The clamping structure 232 prevents the pole body 231 from directly contacting the housing component 21. The clamping structure 232 may include at least a first clamping member 2321 and a second clamping member 2322 connected together, wherein the first clamping member 2321 and the second clamping member 2322 can be understood as two clamping arms arranged opposite to each other.

[0172] Referring to Figures 5 and 7, the first clamping member 2321 can be bent toward the direction of the second clamping member 2322, and the second clamping member 2322 is a straight clamping arm; or, the second clamping member 2322 can be bent toward the direction of the first clamping member 2321, and the first clamping member 2321 is a straight clamping arm; or, referring to Figure 9, both the first clamping member 2321 and the second clamping member 2322 are bent clamping arms, and they are bent toward each other.

[0173] The clamping structure 232 can be made of materials such as, but not limited to, metal or plastic. Metal materials can be made of materials such as, but not limited to, steel or aluminum, and plastic materials can be made of materials such as, but not limited to, polycarbonate or polypropylene.

[0174] The clamping groove 2323 may refer to the groove structure defined between the first clamping member 2321 and the second clamping member 2322, and the groove opening 2323a may refer to the open portion of the clamping groove 2323.

[0175] "The clamping groove 2323 tightens at the groove opening 2323a" can be understood as the bent one of the first clamping member 2321 and the second clamping member 2322 being an inclined straight clamping arm or an arc-shaped clamping arm. Taking the example that both the first clamping member 2321 and the second clamping member 2322 are bent, the clamping groove 2323 formed by the first clamping member 2321 and the second clamping member 2322 can be a C-shaped groove, a conical groove, etc., without specific limitations.

[0176] 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 structure.

[0177] Since the electrode component 23 includes an electrode body 231, a clamping structure 232, and an insulating sealing structure 233, in this structure of the electrode component 23, the electrode body 231 serves as an important structural component for transmitting the electrode component 22 and external power connection components (bus, pad, or wire, etc.). The electrode body 231 can be pre-installed on the clamping structure 232 through the insulating sealing structure 233, and then the clamping structure 232 is connected to the first shell wall 201. This can protect the electrode body 231, reduce the risk of damage caused by direct contact and collision between the electrode body 231 and the first shell wall 201, improve the integrity of the electrode body 231, and thus ensure the performance of the electrode body 231.

[0178] In the clamping structure 232 of the above scheme, the first clamping member 2321 and the second clamping member 2322 can form a clamping groove 2323. The clamping groove 2323 clamps the pole body 231 through the insulating sealing structure 233. In this way, the clamping structure 232 can provide a relatively reliable clamping force to the pole body 231, improving the installation reliability of the pole body 231. Since the clamping groove 2323 tightens at the groove opening 2323a, the tightening position of the groove opening 2323a has a relatively small working surface on the pole body 231. The "tightening position" can provide a greater clamping force to the pole body 231. This allows the insulating sealing structure 233 to have a greater compression at the position corresponding to the "tightening position", which is beneficial to improving the insulation and sealing between the pole body 231 and the clamping structure 232.

[0179] Referring to Figures 3 and 4, the "thickness direction of the first shell wall 201" can be the third direction Z in the figures. For ease of understanding, referring to Figure 5, the minimum size of the slot 2323a can be denoted as M1, and the maximum size of the clamping groove 2323 can be denoted as M2. The statement that "the ratio of the minimum size of the slot 2323a to the maximum size of the clamping groove 2323 is less than 90%" can be understood as M1 / M2 being less than 0.9. Here, M1 / M2 can be, but is not limited to, 0.9, 0.8, 0.7, 0.6, 0.5, etc.

[0180] It is understandable that the clamping groove 2323 needs to be set to a minimum size at the tightening position of the groove 2323a. If the tightening range of the groove 2323a is small, it is not conducive to the clamping structure 232 providing a greater clamping force to the insulating sealing structure 233 and the pole body 231, affecting the insulation and sealing performance of the insulating sealing structure 233, as well as the clamping reliability of the pole body 231. Therefore, by setting the minimum size of the groove 2323a and the maximum size of the clamping groove 2323 within the above-mentioned range, on the one hand, the clamping structure 232 can provide a larger clamping force to the pole body 231, giving the pole body 231 higher installation reliability; on the other hand, the clamping structure 232 can give the insulating sealing structure 233 a greater compression amount, resulting in better insulation and sealing effects between the pole body 231 and the clamping structure 232.

[0181] In the above technical solution, the electrode post component 23 with the above structure can be clamped and fixed by the insulating sealing structure 233 and the clamping structure 232, and then connected to the first shell wall 201 of the shell component 21 through the clamping structure 232. This can reduce the risk of contact between the electrode post body 231 and the shell component 21 during the assembly of the battery cell 20, reduce the probability of damage to the electrode post body 231, help ensure the integrity of the electrode post body 231, improve the reliability of the electrode post body 231 overcurrent, and thus improve the reliability of the battery cell 20. The clamping groove 2323 formed by the first clamping member 2321 and the second clamping member 2322 can clamp the insulating sealing structure 233 and the terminal body 231 more securely, and the clamping structure 232 is not easily pried open. This can improve the installation reliability of the insulating sealing structure 233 and the terminal body 231, which is conducive to improving the overall stability of the terminal component 23. It can also increase the compression of the insulating sealing structure 233, improve the insulation and sealing between the clamping structure 232 and the terminal body 231, thereby improving the reliability of the terminal component 23, and in turn, improving the reliability of the battery cell 20.

[0182] In some embodiments of this application, referring to Figures 5, 7 and 9, the first clamping member 2321 includes a first arm 2301, a second arm 2302 and a third arm 2303 connected by bending in sequence. The first arm 2301 is connected to the second clamping member 2322 and extends away from the second clamping member 2322. At least one of the second arm 2302 and the third arm 2303 extends towards the second clamping member 2322. The first arm 2301, the second arm 2302 and the third arm 2303 together with the second clamping member 2322 form a clamping groove 2323. The end of the third arm 2303 away from the second arm 2302 and the end of the second clamping member 2322 away from the first arm 2301 together form a slot 2323a.

[0183] The first clamping member 2321 can be further away from the first shell wall 201 relative to the second clamping member 2322. The first clamping member 2321 can be divided into three parts, including the first arm 2301, the second arm 2302 and the third arm 2303 respectively. Referring to Figures 5, 7 and 9, for ease of understanding, two auxiliary dotted lines are drawn on the first clamping member 2321 to mark the boundary.

[0184] Referring to FIG5, both the second arm 2302 and the third arm 2303 can extend gradually toward the second clamping member 2322. Exemplarily, referring to FIGS. 7 and 9, the third arm 2303 can extend gradually toward the second clamping member 2322. Exemplarily, the second arm 2302 can also extend gradually toward the second clamping member 2322.

[0185] In the above technical solution, since the first arm 2301, the second arm 2302 and the third arm 2303 are bent and connected in sequence, the first clamping member 2321 can form a clamping groove 2323 that is wider inside and narrower outside. The inner space of the clamping groove 2323 is relatively ample, and the pole body 231 can be closer to the inner side of the clamping groove 2323. As a result, the size of the part where the pole body 231 and the clamping groove 2323 are combined is larger, which can improve the installation reliability of the pole body 231.

[0186] Because the inner space of the clamping groove 2323, defined by the first arm 2301, the second arm 2302, and the third arm 2303, is relatively large, the electrode body 231 can be inserted closer to the first arm 2301 when embedded inside the clamping groove 2323. That is, the dimensions of the electrode body 231 and the first arm 2301 in the first direction X can be relatively small. In other words, the above structure also allows for a more compact arrangement between the electrode body 231 and the clamping groove 2323, reducing the volume of the electrode component 23 and improving the volumetric energy density of the battery cell 20.

[0187] In some embodiments of this application, referring to Figures 5, 7 and 9, the second arm 2302 is disposed parallel to the first shell wall 201, and the second arm 2302 is bent and connected to the first arm 2301 and the third arm 2303; or, the second arm 2302 is an arc-shaped arm, bent and connected to the first arm 2301 and the third arm 2303.

[0188] For example, referring to Figures 7 and 9, the second arm 2302 is disposed parallel to the first shell wall 201, and the second arm 2302 can be bent and connected to both the first arm 2301 and the third arm 2303.

[0189] For example, referring to FIG5, the second arm 2302 is disposed parallel to the first shell wall 201. The second arm 2302 can be an arc-shaped arm, which is bent to connect the first arm 2301 and the third arm 2303. In this embodiment, the arc-shaped arm can make the transition between the first arm 2301 and the third arm 2303 smoother and more rounded, reduce the risk of stress concentration, and improve the reliability of the first clamping member 2321.

[0190] During the use of the battery cell 20, the terminal body 231 may be subjected to tension from the busbar, wires, or other electrical connection 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 is easily subjected to the force of the components connected to it; or, when there is a large amount 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.

[0191] 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 shell wall 201, which may cause the electrode body 231 to detach from the clamping structure 232. In the above technical solution, whether the second arm 2302 is bent and connected to the first arm 2301 and the third arm 2303, or the second arm 2302 is an arc-shaped arm that is bent and connected to the first arm 2301 and the third arm 2303, the bending direction of the bending structure of the first clamping member 2321 is opposite to the force direction of the electrode body 231. When the electrode body 231 is subjected to a force in a direction away from the first shell wall 201, the first clamping member 2321 has a better resistance to deformation, which can increase the difficulty of the electrode body 231 detaching from the clamping structure 232 and reduce the probability of the electrode body 231 detaching from the clamping structure 232.

[0192] In the above technical solution, the first clamping member 2321 adopts the aforementioned bending structure, which improves its strength and rigidity. When the electrode body 231 is subjected to a force from the electrode component 22 in the direction pointing towards the first shell wall 201, the first clamping member 2321 has a better resistance to deformation, which can reduce the probability of large deformation causing the electrode body 231 to detach from the clamping structure 232, thus improving the overall reliability of the electrode component 23. Moreover, the above structure can provide more implementation schemes for the first clamping member 2321, which can increase design flexibility and help meet different product requirements.

[0193] In some embodiments of this application, referring to Figures 5, 7 and 9, the third arm portion 2303 is arranged at an angle relative to both the first arm portion 2301 and the first shell wall 201; or, the third arm portion 2303 is arranged parallel to the first arm portion 2301 and is arranged at an angle relative to both the first shell wall 201.

[0194] For example, referring to Figures 5 and 7, the third arm 2303 is set at an angle relative to the first arm 2301 and the first shell wall 201, wherein the second arm 2302 can be an arc-shaped arm or a straight arm.

[0195] For example, referring to FIG9, the third arm 2303 is arranged parallel to the first arm 2301, and both are arranged at an angle to the first shell wall 201.

[0196] In the above technical solution, the third arm 2303 is set at an angle relative to the first arm 2301 and the first shell wall 201. This structure makes the bending structure of the first clamping member 2321 simpler, reduces the molding difficulty, improves manufacturability, and increases product yield. For the clamping structure 232 to clamp the electrode body 231, the third arm 2303 must either be perpendicular to the first shell wall 201 or tilted towards the electrode body 231. In this case, by setting the third arm 2303 parallel to the first arm 2301 and both at an angle to the first shell wall 201, the distance between the third arm 2303 and the first arm 2301 can be relatively small. The first arm 2301 needs to undergo a greater positional deformation relative to the third arm 2303 to allow the electrode body 231 to detach from the clamping structure 232. This increases the difficulty for the electrode body 231 to detach from the clamping structure 232, thereby improving the clamping reliability of the clamping structure 232 on the electrode body 231. This improves the overall reliability of the electrode body 231 and, consequently, the reliability of the battery cell 20.

[0197] In some embodiments of this application, referring to Figures 5, 7 and 9, the first arm portion 2301 is disposed perpendicular to the first shell wall 201.

[0198] By setting the first arm 2301 perpendicular to the first shell wall 201, the distance between the pole body 231 and the first arm 2301 can be relatively small, and the position arrangement between the clamping structure 232 and the pole body 231 can be more compact, which is conducive to reducing the overall size of the pole component 23 and improving the volumetric energy density of the battery cell 20.

[0199] When the clamping structure 232 clamps and fixes the pole body 231, the first arm 2301 and the second arm 2302 are used to press a portion of the insulating sealing structure 233 onto the pole body 231. For ease of understanding, the portion of the insulating sealing structure 233 located between the edge portion 2312 and the second clamping member 2322 can be referred to as the first sealing member 2331. Since the first arm 2301 is perpendicular to the first shell wall 201, the compression arm 236 formed by the clamping structure 232 on the first sealing member 2331 is relatively short (see Figure 4). The compression arm 236 can refer to the line connecting the two points in Figure 4. This increases the torque of the second arm 2302 and the third arm 2303 on the first sealing member 2331, thereby increasing the compression of the first sealing member 2331 and improving the sealing reliability of the first sealing member 2331.

[0200] To facilitate understanding, a further example can be provided: the first clamping member 2321 can be riveted onto the pole body 231 via the insulating sealing structure 233, thereby forming a first arm 2301, a second arm 2302, and a third arm 2303. When the riveting force is removed, because the compression arm 236 formed by the clamping structure 232 on the first seal 2331 is relatively short, the reaction arm of the rebound of the first seal 2331 on the second arm 2302 and the third arm 2303 is also relatively short. This allows the first seal 2331 to maintain a large compression, which helps to improve the problem of compression attenuation of the first seal 2331, ensuring that the compression of the first seal 2331 remains at the expected set value. This, in turn, improves the sealing reliability of the first seal 2331 between the edge portion 2312 and the second clamping member 2322, that is, improves the insulation and sealing performance of the insulating sealing structure 233.

[0201] Furthermore, referring to Figures 5, 7, 9 and 10, since the first arm 2301 is arranged perpendicular to the first shell wall 201, the structure formed by the first clamping member 2321, the second clamping member 2322 and the pole body 231 is more compact, which is beneficial to reduce the size of the clamping structure 232 in the first direction X and the second direction Y, making the overall structure of the pole component 23 more compact. Because the clamping structure 232 is more compact in the second direction Y, and the dimensions of the first shell wall 201 in the second direction Y are the same, the dimensions of the electrode body 231 in the second direction Y of the electrode component 23 of this application can be made larger. This is beneficial to increase the area of ​​the surface 23101 of the electrode body 231 on the side away from the electrode component 23. When the electrode body 231 is connected to the bus or other electrical connection component through the surface 23101, the surface 23101 and the bus, the switch or other electrical connection component can have a larger connection surface (e.g., welding surface). As a result, the electrode body 231 can also have a larger current flow area, which can improve the charging and discharging efficiency and is conducive to realizing a higher performance narrow cell design.

[0202] In the above technical solution, the structure in which the first arm 2301 is perpendicular to the first shell wall 201 can, on the one hand, reduce the compressive force arm 236 of the clamping structure 232 on the insulating and sealing structure 233, enhance the compressive effect of the first clamping member 2321 on the insulating and sealing structure 233, enhance the insulation and sealing effect, and improve the insulation and sealing reliability of the insulating and sealing structure 233, thereby improving the overall reliability of the battery cell 20. On the other hand, the above structure can also make the structure of the clamping structure 232 more compact, thereby making the overall structure of the electrode post component 23 more compact. As a result, the side of the electrode post body 231 away from the electrode component 22 can have a larger surface area 23101, which is beneficial to increasing the current-carrying area of ​​the electrode post body 231 and improving the current-carrying capacity of the electrode post body 231, thereby improving the charging and discharging performance of the battery cell 20.

[0203] In some embodiments of this application, referring to FIG9, the second clamping member 2322 includes a fourth arm portion 2304, which is parallel to the first shell wall 201 and together with the first clamping member 2321 forms a clamping groove 2323.

[0204] Referring to Figure 8, the second clamping member 2322 can be closer to the inner side of the housing member 21 and closer to the electrode member 22 than the first clamping member 2321. Since the fourth arm 2304 is parallel to the first housing wall 201, the fourth arm 2304 occupies a relatively small space in the third direction Z.

[0205] In the above technical solution, the fourth arm 2304 is relatively close to the inner side of the housing component 21. By making the fourth arm 2304 parallel to the first housing wall 201, the fourth arm 2304 can be arranged more compactly in the housing component 21, saving internal space of the housing component 21. This is beneficial to increase the size of the electrode component 22 and improve the volumetric energy density of the battery cell 20.

[0206] In some embodiments of this application, referring to FIG9, the second clamping member 2322 further includes a fifth arm 2305, which is bent and connected to the fourth arm 2304 and extends toward the first clamping member 2321.

[0207] The second clamping member 2322 can be divided into two parts, namely a fourth arm 2304 and a fifth arm 2305, forming an L-shaped bending structure. For example, the fifth arm 2305 can be understood as a protrusion or bulge protruding relative to the fourth arm 2304. A slot 2323a can be defined between the fifth arm 2305 and the third arm 2303.

[0208] In the above technical solution, since the third arm 2303 is bent relative to the second arm 2302, and on this basis, the fifth arm 2305 is bent and connected to the fourth arm 2304, so that the first clamping member 2321 and the second clamping member 2322 can form protruding structures that protrude in the direction of each other, which can further increase the clamping force on the pole body 231 and further improve the installation reliability of the pole body 231. By adopting the above structure, on the one hand, the compressive force on the insulating sealing structure 233 can be further increased, the compression amount of the insulating sealing structure 233 can be increased, and the insulation and sealing performance of the insulating sealing structure 233 between the electrode body 231 and the clamping structure 232 can be improved. On the other hand, the protruding structure formed by the first clamping member 2321 and the second clamping member 2322 can increase the complexity of the insulation and sealing path of the insulating sealing structure 233, which is conducive to increasing the contact surface between the insulating sealing structure 233 and the first clamping member 2321 and the second clamping member 2322. This can also enhance the insulation and sealing performance of the insulating sealing structure 233 between the electrode body 231 and the clamping structure 232, reduce the risk of electrolyte leakage from the electrode component 23, and improve the reliability of the battery cell 20.

[0209] In some embodiments of this application, referring to Figures 3, 8, and 9, the fifth arm 2305 is perpendicular to the first shell wall 201. In the above technical solution, since the fourth arm 2304 is parallel to the first shell wall 201, the fifth arm 2305 being perpendicular to the first shell wall 201 can be understood as the fifth arm 2305 being perpendicular to the fourth arm 2304. In this way, the overall structure of the second clamping member 2322 is more compact, and the dimensions of the fifth arm 2305 in the first direction X and the third direction Z can be made smaller, which helps to save space and reduce the overall volume of the electrode post component 23. On the other hand, since the fifth arm 2305 is perpendicular to the fourth arm 2304, the second clamping member 2322 can form a vertical structure, which can improve the overall strength and rigidity of the second clamping member 2322, enhance the fixing effect on the insulating sealing structure 233 and the electrode post body 231, improve the overall reliability of the electrode post component 23, and thus improve the overall reliability of the battery cell 20.

[0210] In some embodiments of this application, referring to Figures 4, 6, 8, 12 to 14, the pole body 231 includes a main body portion 2311 and an edge portion 2312 connecting the main body portion 2311, with the edge portion 2312 located within the clamping groove 2323.

[0211] The main body 2311 may refer to the main structural part of the pole body 231, which is used to electrically connect the electrode component 22.

[0212] The edge portion 2312 may refer to the annular portion provided around the periphery of the main body portion 2311. Referring to FIG15, in the third direction Z of FIG15, the thickness of the edge portion 2312 may be less than the thickness of the main body portion 2311.

[0213] In the above technical solution, the edge portion 2312 of the pole body 231 is clamped and engaged with the clamping groove 2323 formed by the clamping structure 232, while the main body portion 2311 can be exposed outside the clamping groove 2323 and connected to other electrical connection components such as busbars, wires or switches. Furthermore, the main body portion 2311 can easily remain flush with the surface of the clamping structure 232 away from the first shell wall 201, or maintain a small height difference. This is beneficial for making the overall shape of the pole component 23 more regular, and also makes it easier for the pole body 231 to be connected to other electrical connection components such as busbars, wires or switches.

[0214] In some embodiments of this application, referring to Figures 15 to 17, the edge portion 2312 is bent relative to the main body portion 2311.

[0215] For example, referring to Figures 15 and 17, the edge portion 2312 can be configured with a different thickness, so that the edge portion 2312 is bent entirely relative to the main body portion 2311. Referring to Figure 16, the edge portion 2312 can also be bent entirely relative to the main body portion 2311 by partially bending. The edge portion 2312 can also be bent entirely relative to the main body portion 2311.

[0216] In the above technical solution, by bending the edge portion 2312 relative to the main body portion 2311, the overall strength and rigidity of the edge portion 2312 can be improved. This is beneficial for improving the strength and rigidity of the structure formed after the edge portion 2312 and the clamping structure 232 are combined, thereby improving the overall structural reliability of the electrode post component 23. Because the edge portion 2312 has a bent position, this method increases the complexity of the insulation sealing path at the junction of the insulation sealing structure 233 and the edge portion 2312, increasing the contact area and thus enhancing the insulation and sealing performance between the clamping structure 232 and the edge portion 2312. This reduces the risk of electrolyte leakage at the location of the electrode post component 23 and also helps improve the reliability of the battery cell 20.

[0217] In some embodiments of this application, referring to Figures 4, 6 and 8, the edge portion 2312 is at least partially arranged parallel to the third arm portion 2303.

[0218] For example, referring to FIG4, the edge portion 2312 may be arranged parallel to the third arm portion 2303 as a whole; or, referring to FIG6 and FIG8, a portion of the edge portion 2312 may be arranged parallel to the third arm portion 2303.

[0219] In the above technical solution, by setting the edge portion 2312 at least partially parallel to the third arm portion 2303, and the distance between the edge portion 2312 and the third arm portion 2303 is relatively small, the compression amount of the insulating sealing structure 233 located between the edge portion 2312 and the third arm portion 2303 can be kept consistent, and it is beneficial to maintain a large compression amount, which can improve the stability and reliability of insulation and sealing, reduce the risk of electrolyte leakage, and improve the reliability of the battery cell 20.

[0220] In some embodiments of this application, referring to Figures 4, 6, 8, 11 to 17, the edge portion 2312 is formed with a first recessed portion 2312a, and the third arm portion 2303 engages with the first recessed portion 2312a.

[0221] The first recessed portion 2312a can refer to the recessed space formed on the edge portion 2312. The first recessed portion 2312a can be, but is not limited to, a slope shape, a U-shaped structure, etc.

[0222] The phrase "the third arm 2303 engages with the first recess 2312a" can be understood as the third arm 2303 engaging with the location of the first recess 2312a via an insulating sealing structure 233. Referring to Figures 4, 6, and 8, the third arm 2303 may be located outside the first recess 2312a, or it may be partially located inside the first recess 2312a.

[0223] In the above technical solution, the third arm portion 2303 cooperates with the first recessed portion 2312a through the insulating sealing structure 233, thereby enabling a tighter fit between the first clamping member 2321 and the edge portion 2312. This enhances the clamping strength of the clamping structure 232 on the edge portion 2312 and improves the installation reliability of the electrode body 231. The first recessed portion 2312a also increases the complexity of the contact surface between the edge portion 2312 and the insulating sealing structure 233 and increases the contact area, thereby enhancing the insulation and sealing performance of the insulating sealing structure 233 between the edge portion 2312 and the first clamping member 2321, and thus also improving the reliability of the battery cell 20.

[0224] In some embodiments of this application, referring to Figures 4 to 9 and Figures 11 to 14, the third arm portion 2303 protrudes relative to the second arm portion 2302 toward the side closer to the first recess portion 2312a, and is connected to the first recess portion 2312a in an insulated and sealed manner through an insulating sealing structure 233.

[0225] For example, referring to Figures 4 to 7, the third arm portion 2303 can be bent relative to the second arm portion 2302 in a direction close to the first recess 2312a, thereby forming a protruding structure. Referring to Figures 8 to 9, the third arm portion 2303 can also be provided on the end face of the second arm portion 2302 near the first shell wall 201, and protrude in a direction close to the first recess 2312a.

[0226] In the above technical solution, by having the third arm 2303 protrude relative to the second arm 2302 towards the side closer to the first recess 2312a, the distance between the third arm 2303 and the first recess 2312a is reduced. This further clamps the insulating sealing structure 233 and the edge portion 2312, improving the installation reliability of the insulating sealing structure 233 and the terminal body 231, thereby improving the overall reliability of the terminal component 23. Since the first recess 2312a increases the complexity and area of ​​the contact surface between the edge portion 2312 and the insulating sealing structure 233, the above structure further increases the complexity and area of ​​the contact surface between the insulating sealing structure 233 and the first clamping member 2321. This further enhances the insulating sealing structure 233 between the first clamping member 2321 and the edge portion 2312, improving the insulation and sealing performance of the terminal component 23, and thus improving the overall reliability of the battery cell 20.

[0227] In some embodiments of this application, referring to Figures 8 and 17, the edge portion 2312 is further formed with a second recess 2312b, and the second clamping member 2322 engages with the second recess 2312b.

[0228] The second recess 2312b can refer to the recessed space formed on the edge portion 2312. The second recess 2312b can be, but is not limited to, a slope shape, a U-shaped structure, etc.

[0229] "The second clamping member 2322 engages with the second recess 2312b". Referring to Figure 8, it can be understood that the second clamping member 2322 may be located outside the second recess 2312b; or, the second clamping member 2322 may be partially located inside the second recess 2312b.

[0230] In the above technical solution, the second clamping member 2322 can cooperate with the second recess 2312b through the insulating sealing structure 233, thereby making the connection between the second clamping member 2322 and the edge portion 2312 tighter, enhancing the clamping strength of the second clamping member 2322 on the edge portion 2312, and improving the installation reliability of the electrode body 231. The second recess 2312b can also increase the complexity of the contact surface between the edge portion 2312 and the insulating sealing structure 233, and increase the contact area, thereby enhancing the insulation and sealing performance of the insulating sealing structure 233 between the edge portion 2312 and the second clamping member 2322, and thus also improving the reliability of the battery cell 20.

[0231] In some embodiments of this application, referring to Figures 8 and 9, the second clamping member 2322 includes a fourth arm 2304 and a fifth arm 2305 connected together. The fourth arm 2304 is connected to the first arm 2301, and the fifth arm 2305 protrudes towards the side near the second recess 2312b and is insulated and sealed to the second recess 2312b through an insulating sealing structure 233.

[0232] In the above technical solution, the fifth arm portion 2305 can form a protruding structure of the second clamping member 2322, and can be connected to the second recessed portion 2312b of the edge portion 2312 through the insulating sealing structure 233. This structure allows for an interlocking connection between the second clamping member 2322 and the edge portion 2312, improving the connection strength and reliability. Furthermore, this structure makes the insulation and sealing path of the insulating sealing structure 233 between the second clamping member 2322 and the edge portion 2312 more tortuous, forming an "S"-shaped structure. This increases the complexity and area of ​​the contact surfaces between the insulating sealing structure 233 and the second clamping member 2322, as well as between the insulating sealing structure 233 and the edge portion 2312, thereby improving the overall insulation and sealing performance of the electrode post component 23, and ultimately enhancing the overall reliability of the battery cell 20.

[0233] In some embodiments of this application, referring to Figures 15 and 17, the local thickness of the edge portion 2312 is reduced to form a first recess 2312a and / or a second recess 2312b.

[0234] It is understandable that the local thickness of the edge portion 2312 can be reduced to form the first recessed portion 2312a. The local thickness of the edge portion 2312 can also be reduced to form the second recessed portion 2312b. The local thickness of the edge portion 2312 can also be reduced to simultaneously form the first recessed portion 2312a and the second recessed portion 2312b. The local thickness of the edge portion 2312 can be gradually reduced, or it can refer to the formation of multiple regions with inconsistent thicknesses.

[0235] For example, referring to FIG15, the bottom surface of the edge portion 2312 near the first shell wall 201 is a flat surface, and the top surface away from the first shell wall 201 can be made into a slope, thereby reducing the thickness of the portion of the edge portion 2312 near the main body portion 2311 to form a first recessed portion 2312a. Referring to FIG17, the portion of the edge portion 2312 near the main body portion 2311 can be thinned at both ends along the third direction Z, thereby forming a first recessed portion 2312a and a second recessed portion 2312b.

[0236] In the above technical solution, the first recess 2312a and / or the second recess 2312b are formed in the above manner, which is easy to process and manufacture, can improve manufacturability, increase production efficiency and reduce costs.

[0237] In some embodiments of this application, referring to Figures 4, 6, 8, 11 to 14, the insulating sealing structure 233 includes a first sealing member 2331, which is sealed between the second clamping member 2322 and the pole body 231.

[0238] The first sealing element 2331 can refer to a structure or component in the insulating sealing structure 233 that plays a sealing role. The first sealing element 2331 can be made of, but is not limited to, rubber, plastic, etc. 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 first sealing element 2331 can be an annular component arranged circumferentially around the pole body 231. For example, the first sealing element 2331 can be a sealing ring.

[0239] In the above technical solution, the first sealing member 2331 can play a sealing role between the second clamping member 2322 and the electrode body 231, reducing the risk of electrolyte leakage between the second clamping member 2322 and the electrode body 231, which can improve the sealing performance of the electrode component 23 and thus improve the reliability of the battery cell 20.

[0240] In some embodiments of this application, referring to Figures 4, 6, 8, 11 to 14, the first sealing member 2331 includes a first portion 2306 and a second portion 2307 that are bent and connected. The pole body 231 includes a main body portion 2311 and an edge portion 2312. The first portion 2306 is sealed between the main body portion 2311 and the second clamping member 2322, and the second portion 2307 is sealed between the edge portion 2312 and the second clamping member 2322.

[0241] The first sealing element 2331 can be divided into two parts, namely the first part 2306 and the second part 2307. The first part 2306 and the second part 2307 are bent and connected, so the first sealing element 2331 as a whole can be, but is not limited to, V-shaped, L-shaped, etc. Among them, the first part 2306 and the second part 2307 can both be annular components.

[0242] In the above technical solution, the first part 2306 can provide a sealing function between the main body 2311 and the second clamping member 2322, and the second part 2307 can provide a sealing function between the edge part 2312 and the second clamping member 2322. This allows the first sealing member 2331 to have a larger sealing surface, enhancing the sealing performance between the second clamping member 2322 and the terminal body 231. The above structure also makes the first sealing member 2331 L-shaped, which increases the contact surface with the second clamping member 2322 and allows for a tighter fit. This improves the installation reliability of the first sealing member 2331 and the second clamping member 2322, reduces the risk of displacement or detachment of the first sealing member 2331 during assembly, and thus improves the sealing reliability of the terminal component 23, thereby enhancing the overall reliability of the battery cell 20.

[0243] In some embodiments of this application, referring to Figures 4, 6, 8, 11 to 14, the pole piece 23 further includes an insulating structure 234 that is insulatingly disposed between the pole piece body 231 and the electrode piece 22, and the second part 2307 is integrally disposed with the insulating structure 234.

[0244] The insulating structure 234 can refer to a component that serves an insulating function, and can be, but is not limited to, plastic, rubber, or ceramic parts. Plastic parts can be made of materials including, but not limited to, polypropylene, polycarbonate, or polystyrene; rubber parts can be made of materials including, but not limited to, nitrile rubber and silicone rubber; and ceramic parts can be made of materials including, but not limited to, alumina ceramics and titanium dioxide ceramics. Optionally, the insulating structure 234 can be a plastic support.

[0245] In the above technical solution, the insulating structure 234 provides an effective insulating barrier on the side of the electrode body 231 near the electrode component 22, isolating the electrode body 231 and the electrode component 22, 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 insulating structure 234 also acts as a barrier, preventing electrolyte from flowing to the electrode component 23, reducing the risk of electrolyte leakage, and preventing external moisture, dust, and other impurities from entering the casing component 21, causing internal short circuits and corrosion problems in the battery cell 20. In other words, the insulating structure 234 helps maintain a clean environment inside the casing component 21, ensuring that the chemical reactions inside the battery cell 20 can function normally. The insulating structure 234 also acts as a buffer between the first casing wall 201 and the electrode component 22, reducing the probability of impact between the first casing wall 201 and the electrode component 22, which could damage the electrode component 22, thus improving the reliability of the battery cell 20.

[0246] In the above technical solution, "the second part 2307 and the insulating structure 234 are integrally formed" can mean that the second part 2307 and the insulating structure 234 are integrally molded, or that the second part 2307 is pre-connected to the insulating structure 234 to form an integral component. This approach simplifies the installation of the first seal 2331 and the insulating structure 234, reduces assembly steps, and improves the production efficiency of the battery cell 20.

[0247] In some embodiments of this application, referring to FIG4, the insulating sealing structure 233 further includes a second sealing member 2332, which is sealed between the first clamping member 2321 and the pole body 231, and the second sealing member 2332 and the first sealing member 2331 are spaced apart.

[0248] The explanation of the second seal 2332 can be found in the previous section on the first seal 2331, and will not be repeated here. The second seal 2332 can be an annular component.

[0249] The phrase "the second seal 2332 and the first seal 2331 are spaced apart" can be understood as meaning that a gap 237 can be formed between the second seal 2332 and the first seal 2331 (see Figure 4). Since the second seal 2332 and the first seal 2331 expand when compressed, they require a certain release space. The gap 237 provides this release space. Furthermore, the second seal 2332 and the first seal 2331 release gas when compressed, and the gap 237 can store this released gas, reducing the risk of the gas released from the second seal 2332 and the first seal 2331 entering the housing component 21 and contaminating the electrolyte. This is beneficial for improving the stability of the internal chemical reaction of the battery cell 20. The gap 237 also serves to relieve pressure, reducing the probability that the expansion force generated by the compression of the second seal 2332 and the first seal 2331 will react with the clamping structure 232, causing damage to the clamping structure 232.

[0250] In the above technical solution, the second sealing element 2332 can serve as the first sealing line between the electrode body 231 and the clamping structure 232, and the first sealing element 2331 serves as the second sealing line between the electrode body 231 and the clamping structure 232. The cooperation between the second sealing element 2332 and the first sealing element 2331 can provide more comprehensive sealing protection, further reducing the risk of electrolyte leakage from the electrode component 23 to the outside, and also reducing the risk of external water, dust and other impurities entering the electrode component 23. This can improve the sealing reliability of the electrode component 23, and thus improve the reliability of the battery cell 20. By spaced apart from the first seal 2331, the second seal 2332 provides the space required for the expansion and deformation of the first seal 2331 and the second seal 2332. This allows for the storage of the compressed gas from the second seal 2332 and the first seal 2331, reducing the likelihood of damage to the clamping structure 232 due to gas action. This improves the reliability of the terminal component 23 and reduces the risk of released gas contaminating the electrolyte, ensuring the stability of the internal chemical reaction of the battery cell 20 and thus enhancing the reliability of the battery cell 20.

[0251] In some embodiments of this application, referring to FIG4, a portion of the second sealing member 2332 extends between the second clamping member 2322 and the pole body 231, and is spaced apart from the first sealing member 2331. In this technical solution, the second sealing member 2332 can wrap around the position where the second clamping member 2322 and the first arm 2301 are connected. This facilitates the formation of a more complex sealing path for the second sealing member 2332, which can further improve the sealing performance of the second sealing member 2332 between the clamping structure 232 and the pole body 231. Moreover, the above structure can make the corner positions of the clamping structure 232 and the pole body 231 more tightly connected, which is beneficial to improving the connection reliability of the clamping structure 232 and the pole body 231, and improving the overall reliability of the pole component 23.

[0252] In some embodiments of this application, a portion of the first sealing member 2331 may extend between the first clamping member 2321 and the pole body 231, and be spaced apart from the second sealing member 2332. In this technical solution, the first sealing member 2331 can wrap around the position where the second clamping member 2322 and the first arm portion 2301 are connected. This facilitates the formation of a more complex sealing path for the first sealing member 2331, which can further improve the sealing performance of the first sealing member 2331 between the clamping structure 232 and the pole body 231. Moreover, the above structure can make the corner positions of the clamping structure 232 and the pole body 231 more tightly connected, which is beneficial to improving the connection reliability of the clamping structure 232 and the pole body 231, and improving the overall reliability of the pole component 23.

[0253] In some embodiments of this application, referring to FIG4, the insulating sealing structure 233 further includes an insulating member 2333, which is disposed on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323.

[0254] The explanation of insulating component 2333 can be found in the previous section on insulating structure 234, and will not be repeated here.

[0255] It is understandable that, based on the first sealing member 2331 provided between the second clamping member 2322 and the pole body 231, and the second sealing member 2332 provided between the first clamping member 2321 and the pole body 231, an insulating member 2333 can be provided on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323, so that the insulating member 2333 can play an insulating role on the outer peripheral side of the first clamping member 2321.

[0256] In the above technical solution, by setting the insulating component 2333 on the outer surface 2321a of the first clamping component 2321 away from the clamping groove 2323, it can play an insulating protection role on the outside of the first clamping component 2321, reduce the risk of short circuit on the first clamping component 2321, and reduce the occurrence of chemical corrosion. Moreover, the insulating component 2333 can also play a protective role, reducing the risk of damage to the outside of the first clamping component 2321 caused by impact or bump, which is conducive to improving the reliability of the terminal component 23, and thus improving the reliability of the battery cell 20.

[0257] In some embodiments of this application, referring to Figures 6, 8, 11 to 14, the insulating sealing structure 233 further includes an insulating member 2333, which includes a first insulating portion 2308 disposed between the first clamping member 2321 and the pole body 231.

[0258] Optionally, the insulating component 2333 can be an injection-molded part. The insulating component 2333 can be a structural component obtained by injection molding, or it can refer to a component directly injection-molded between the clamping structure 232 and the pole body 231. The insulating component 2333 may include only the first insulating portion 2308, or it may include other portions; no specific limitations are imposed here.

[0259] In the above technical solution, the first insulating part 2308 can play an insulating role between the first clamping member 2321 and the electrode body 231, reducing the risk of short circuit or other electrical safety accidents. Moreover, the first insulating part 2308 can also play a sealing role before the first sealing member 2331. The first insulating part 2308 serves as a sealing defense line, and the first sealing member 2331 serves as another sealing defense line, thereby playing a dual protection role, reducing the probability of electrolyte seeping out from the inside of the shell component 21, and effectively resisting the intrusion of moisture and dust, thereby improving the reliability of the battery cell 20.

[0260] In some embodiments of this application, referring to Figures 6, 8, 11 to 14, the insulating member 2333 further includes a second insulating portion 2309, which is disposed on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323 and is connected to the first insulating portion 2308.

[0261] The “outer surface 2321a of the first clamping member 2321 facing away from the clamping groove 2323” can be seen in Figures 6, 8 and 9.

[0262] It is understood that the insulating member 2333 may include two parts, an inner part and an outer part. The inner part is the first insulating part 2308, which is disposed between the first clamping member 2321 and the pole body 231, and the outer part is the second insulating part 2309, which is wrapped around the outer surface 2321a of the first clamping member 2321.

[0263] 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 is likely to occur. 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 wrapping the second insulating part 2309 around the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323, thereby reducing the probability of short circuit in the terminal component 23.

[0264] In some cases, uneven electric fields in high-voltage battery cells may cause partial discharge, which can damage the battery's performance and lifespan. By covering the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323 with the second insulating part 2309, 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.

[0265] In other cases, during the transportation, installation and use of the battery cell 20, the terminal body 231 may also be subjected to various external impacts, such as collisions, vibrations, etc. The second insulating part 2309 can play a buffering role on the outer periphery of the clamping structure 232, absorb some of the external forces, reduce the risk of the terminal body 231 being directly impacted, and help ensure the integrity and conductivity of the terminal body 231.

[0266] In the above technical solution, the structure described above provides insulation protection on the outer circumference of the electrode post 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. The second insulating part 2309 can also form a protective layer on the periphery of the first clamping member 2321, which can play a buffering and vibration damping role, thereby reducing the impact on the electrode post body 231, reducing the probability of damage to the electrode post body 231, and thus improving the reliability of the battery cell 20.

[0267] In some embodiments of this application, referring to Figures 4, 6, 8, and 11 to 14, the electrode body 231 includes an outer protrusion 2313 located in the inner ring region of the first clamping member 2321. The outer protrusion 2313 protrudes outward relative to the first clamping member 2321 toward the outer side of the first shell wall 201. The side surface 23101 of the outer protrusion 2313 away from the electrode component 22 includes a central region 23131 and a peripheral region 23132. The peripheral region 23132 is disposed around the central region 23131. The central region 23131 protrudes outward relative to the peripheral region 23132 toward the outer side of the first shell wall 201. The side surface of the second insulating portion 2309 away from the electrode component 22 is flush with the peripheral region 23132.

[0268] In the above technical solution, on the side surface 23101 of the outer protrusion 2313 of the pole post away from the electrode component 22, the central region 23131 protrudes outward toward the outer side of the first shell wall 201 relative to the peripheral region 23132. As a result, the peripheral obstruction of the central region 23131 is relatively small, and the central region 23131 is easy to connect with other electrical connection components such as busbars and switches. For example, the central region 23131 can be easily welded. By making the surface of the second insulating portion 2309 furthest from the electrode component 22 flush with the surrounding area 23132, the probability of a large height difference between the outer protrusion of the electrode post 2313 and the second insulating portion 2309 can be reduced. This helps to reduce the risk of short circuits caused by foreign objects (such as metal scraps, wires, etc.) accidentally falling into the height difference between the outer protrusion of the electrode post 2313 and the second insulating portion 2309 during the use or handling of the battery cell 20. It also reduces the probability of stress concentration caused by the height difference, which helps to improve the reliability of the battery cell 20.

[0269] In some embodiments of this application, referring to Figures 6, 8, 12 to 14, 18 and 19, the first insulating portion 2308 and the second insulating portion 2309 are either integrally formed or separately formed.

[0270] Referring to Figures 12 and 18, the first insulating portion 2308 and the second insulating portion 2309 are integrally formed, for example, by a single injection molding process. Referring to Figures 13, 14, and 19, the first insulating portion 2308 and the second insulating portion 2309 can also be separate components, for example, they can be plastic parts assembled separately.

[0271] In the above technical solution, the first insulating part 2308 and the second insulating part 2309 are integrated, which reduces the number of parts, reduces assembly steps, and improves assembly efficiency. If the first insulating part 2308 and the second insulating part 2309 are separate parts, it is easier to control their quality, reducing maintenance difficulty and facilitating product quality control.

[0272] In some embodiments of this application, the first insulating portion 2308 is injection molded between the first clamping member 2321 and the pole body 231; and / or, the second insulating portion 2309 is injection molded on the outer surface 2321a of the first clamping member 2321 opposite to the clamping groove 2323.

[0273] The first insulating portion 2308 can be injection molded between the first clamping member 2321 and the pole body 231, while the molding method of the second insulating portion 2309 is not limited; or, the second insulating portion 2309 can be injection molded on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323, while the molding method of the first insulating portion 2308 is not limited; or, the first insulating portion 2308 can be injection molded between the first clamping member 2321 and the pole body 231, and the second insulating portion 2309 can be injection molded on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323.

[0274] In the above technical solution, by injection molding the first insulating part 2308 between the first clamping member 2321 and the electrode body 231, the installation of the first insulating part 2308, the first clamping member 2321 and the electrode body 231 is easier, which can save time, improve assembly efficiency, reduce the gap between the first insulating part 2308, the first clamping member 2321 and the electrode body 231, reduce the risk of electrolyte leakage, and improve the bonding strength of the first insulating part 2308, the first clamping member 2321 and the electrode body 231, thereby improving the overall connection reliability of the electrode component 23. By injection molding the second insulating portion 2309 onto the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323, the installation of the second insulating portion 2309 onto the first clamping member 2321 becomes easier, saving time and improving assembly efficiency. It also helps to reduce the gap between the second insulating portion 2309 and the first clamping member 2321, reducing the risk of electrolyte leakage, and improving the bonding strength between the second insulating portion 2309 and the first clamping member 2321, thereby improving the overall connection reliability of the electrode post component 23.

[0275] In some embodiments of this application, referring to FIG18, the first insulating portion 2308 is injection molded between the first clamping member 2321 and the pole body 231, and the second insulating portion 2309 is injection molded on the outer surface 2321a of the first clamping member 2321 away from the clamping groove 2323; the first clamping member 2321 has a through hole 2321b, and a portion of the second insulating portion 2309 passes through the through hole 2321b and is connected to the first insulating portion 2308.

[0276] In the above technical solution, the first insulating portion 2308 and the second insulating portion 2309 can be an integral part. During the integral injection molding of the first insulating portion 2308 and the second insulating portion 2309, the injection molding liquid forms the second insulating portion 2309 on the outer surface 2321a of the first clamping member 2321 facing away from the clamping groove 2323. Simultaneously, a portion of the injection molding liquid enters from the outside of the first clamping member 2321 between the first clamping member 2321 and the electrode body 231, while another portion directly enters from the perforation 2321b between the first clamping member 2321 and the electrode body 231, thereby forming the first insulating portion 2308. 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 first clamping member 2321 and the second clamping member 2322 are integrally formed; and / or, the first clamping member 2321, the second clamping member 2322 and the first shell wall 201 are all integrally formed.

[0278] Referring to Figures 5, 7 and 9, the first clamping member 2321 and the second clamping member 2322 can be formed by riveting the same component, or they can be formed by integral casting, injection molding or extrusion molding, etc. There are no specific restrictions here.

[0279] The first clamping member 2321, the second clamping member 2322, and the first shell wall 201 are formed by casting, injection molding, or extrusion molding, etc., and no specific restrictions are imposed here.

[0280] In the above technical solution, the first clamping member 2321 and the second clamping member 2322 are integrally formed, resulting in good overall consistency, high strength and rigidity, and good reliability of the clamping structure 232. This also reduces the number of parts in the terminal post component 23, improving assembly efficiency. The integral forming of the first clamping member 2321, the second clamping member 2322, and the first shell wall 201 further reduces the number of parts, simplifies the assembly process, and improves assembly efficiency. Furthermore, the seamless connection between the first clamping member 2321 and the second clamping member 2322 and the first shell wall 201 reduces sealing failure paths and improves the reliability of the battery cell 20.

[0281] In some embodiments of this application, referring to FIG20, the clamping structure 232 includes an inner ring segment 2324 and an outer ring segment 2325 surrounding the inner ring segment 2324. The outer ring segment 2325 is connected to the first shell wall 201. A portion of the inner ring segment 2324 forms a second clamping member 2322, and another portion is riveted to form a first clamping member 2321.

[0282] The clamping structure 232 can be made of metal; for example, it can be made of aluminum. Optionally, the clamping structure 232 can be pre-formed with an outer ring segment 2325, where the outer ring segment 2325 refers to a part that is pre-formed and will not be further processed, and the inner ring segment 2324 refers to a part that needs to be re-formed later. Referring to FIG20, the insulating sealing structure 233 can include a first sealing member 2331 and a second sealing member 2332. The edge portion 2312 can be assembled to the second clamping member 2322 through the first sealing member 2331, and then the second sealing member 2332 is assembled to the edge portion 2312 and the main body portion 2311. Finally, the inner ring segment 2324 forms the first clamping member 2321 by riveting and cooperates with the second clamping member 2322 to clamp the second sealing member 2332, forming the pole member 23 shown in FIG4.

[0283] In other examples, the first seal 2331 may also be assembled later. For example, the inner ring segment 2324 is bent toward the edge portion 2312 by riveting to form the first arm portion 2301, the second arm portion 2302 and the third arm portion 2303. Then, the second seal 2332 is injection molded into the gap formed between the first clamping member 2321 and the pole body 231.

[0284] In the above technical solution, the clamping structure 232 is an integrally formed part, and the first clamping part 2321 and the second clamping part 2322 can be formed by riveting. As a result, the overall consistency of the clamping structure 232 is relatively good and the connection gaps are also smaller. This can enhance the connection strength between the clamping structure 232 and the pole body 231, reduce the risk of loosening, and the riveting and pressing method can also form a good sealing effect, further improving the sealing performance between the clamping structure 232 and the pole body 231. This is conducive to improving the reliability of the clamping structure 232, and thus improving the reliability of the pole component 23.

[0285] In some embodiments of this application, referring to FIG5, the length of the second clamping member 2322 in the direction from the first shell wall 201 to the pole body 231 is L1, and the thickness of the second clamping member 2322 is H1, satisfying the relationship: y = -(P·L1) 4 ) / 8E(b·H1 3 / 12);

[0286] Where y is the deflection of the second clamping member 2322, which should be less than 25% of the compression of the insulating sealing structure 233, in mm;

[0287] P represents the maximum rebound force of the insulating and sealing structure 233 after compression, in N.

[0288] E is the elastic modulus of the second clamping member 2322, in GPa.

[0289] b is the circumference of the second clamping member 2322 in the circumferential direction of the pole body 231, in mm.

[0290] The thickness direction of the first shell wall 201 can be the third direction Z as shown in Figure 7.

[0291] "The direction of the second clamping member 2322 from the first shell wall 201 to the pole body 231" can be referred to the first direction X in Figure 7.

[0292] The deflection y of the second clamping member 2322 can be determined based on the compression amount of the portion of the insulating sealing structure 233 located between the edge portion 2312 and the second clamping member 2322. For example, the compression amount of the portion of the insulating sealing structure 233 located between the edge portion 2312 and the second clamping member 2322 can be 1 mm, and the deflection y of the second clamping member 2322 can be less than 0.25 mm.

[0293] The portion of the insulating sealing structure 233 located between the edge portion 2312 and the second clamping member 2322 can be referred to as the first sealing member 2331. The P value can be calculated by multiplying the pressure-bearing area of ​​the first sealing member 2331 by the stress per unit area.

[0294] In the above technical solution, by using the above formula, a more suitable thickness and length of the second clamping member 2322 can be calculated, thereby giving the second clamping member 2322 higher strength and rigidity. This can reduce the probability of the second clamping member 2322 undergoing large deformation when the electrode body 231 is subjected to force, and thus reduce the probability of the electrode body 231 falling out of the second clamping member 2322. This can improve the reliability of the insulating sealing structure 233 between the clamping structure 232 and the electrode body 231, reduce the risk of insulation and sealing failure, and improve the reliability of the battery cell 20.

[0295] In some embodiments of this application, referring to Figures 21 and 22, the first clamping member 2321 includes a plurality of riveted portions 301 spaced apart along the direction surrounding the pole post body 231, with discontinuous gaps 302 formed between adjacent riveted portions 301.

[0296] In the above technical solution, the first clamping member 2321 fixes the pole body 231 by riveting. Since the first clamping member 2321 surrounds the pole body 231, by forming intermittent gaps 302 between adjacent riveting portions 301, it can improve the problem of material accumulation or bulging at the corner position when riveting to form the riveting portion 301, which leads to the formation of bulges on the first clamping member 2321. This is beneficial to improve the regularity of the clamping structure 232 and is also beneficial to injection molding.

[0297] In some embodiments of this application, referring to Figures 21 and 22, the outline of the pole body 231 is racetrack-shaped, which is composed of a rectangle 303 and two semicircles 304 located at both ends of the length of the rectangle 303. The riveting part 301 includes a first riveting part 3011 located at both ends of the length of the pole body 231 and a second riveting part 3012 located at both ends of the width of the pole body 231. The discontinuous notch 302 is formed between the first riveting part 3011 and the second riveting part 3012 and is disposed opposite to the connection position of the rectangle 303 and the semicircles 304.

[0298] It is understood that the first clamping member 2321 may include two shorter first riveting portions 3011 and two longer second riveting portions 3012, and the two first riveting portions 3011 and the two second riveting portions 3012 also form a racetrack-shaped outline. With this scheme, the number of first riveting portions 3011 and second riveting portions 3012 is reduced, which can save riveting time. Moreover, since the number of first riveting portions 3011 and second riveting portions 3012 is reduced, the length of each first riveting portion 3011 and second riveting portion 3012 is also larger, and it also has higher strength and rigidity, which can improve the reliability of riveting fixation, thereby improving the overall reliability of the pole post component 23.

[0299] Since the clamping structure 232 is riveted to form the first riveting part 3011 and the second riveting part 3012, during the riveting process, the extrusion at the corner of the racetrack shape is relatively severe, and problems such as material accumulation or bulging are prone to occur. By setting the intermittent notch 302 relative to the connection position of the rectangle 303 and the semicircle 304, the material accumulation at the corner of the first clamping member 2321 can be improved. As a result, the overall material accumulation effect of the first clamping member 2321 is better improved, and the regularity of the outer periphery of the clamping structure 232 is also better improved.

[0300] In the above technical solution, the number of the first riveting part 3011 and the second riveting part 3012 formed by the above structure is small, and the strength and rigidity are relatively high. This is beneficial to improve the clamping strength of the first clamping member 2321 on the electrode body 231, improve the installation reliability of the clamping structure 232 and the electrode body 231, and improve the effect of material stacking or bulging of the first clamping member 2321 during the riveting process. It can improve the regularity of the outer contour of the first clamping member 2321, thereby improving the overall reliability of the battery cell 20.

[0301] In some embodiments of this application, referring to FIG22, the first clamping member 2321 is disposed on the side of the second clamping member 2322 away from the electrode component 22, and is provided with an intermittent notch 302 communicating with the clamping groove 2323.

[0302] In the above technical solution, the first clamping member 2321 can be located on the outer side of the first shell wall 201. The first clamping member 2321 has an intermittent notch 302 communicating with the clamping groove 2323. This method can divide the first clamping member 2321 into multiple parts, reducing the molding difficulty of the first clamping member 2321. For example, the clamping structure 232 can form the first clamping member 2321 by riveting or bending. The multiple parts divided by the first clamping member 2321 can be riveted or bent separately, reducing the difficulty of riveting or bending in one operation and thus improving manufacturability. The intermittent notch 302 also reduces the weight of the first clamping member 2321, which is beneficial for increasing the volumetric energy density of the battery cell 20.

[0303] In some embodiments of this application, referring to FIG22, there are multiple discontinuous notches 302, which are spaced apart along the direction of the clamping structure 232 surrounding the pole body 231.

[0304] The clamping structure 232 can be a pre-formed part, that is, it can be pre-manufactured by means of methods including but not limited to injection molding, stamping, or extrusion molding. The clamping structure 232 can also be fixed to the pole body 231 by riveting through the insulating sealing structure 233. During the riveting process, material extrusion will occur, especially at the corners, which may lead to material accumulation or bulging. By setting multiple intermittent notches 302, more space can be provided to release the extruded material, and the effect of improving the material accumulation or bulging during the riveting process of the clamping structure 232 is also better.

[0305] Multiple discontinuous notches 302 can further reduce the overall weight of the clamping structure 232 and reduce the amount of material used in the clamping structure 232, which can reduce the overall weight of the terminal component 23. The lighter terminal component 23 is also easier to mount onto the housing component 21, which is beneficial to improve assembly efficiency and can also increase the volumetric energy density of the battery cell 20.

[0306] In the above technical solution, multiple discontinuous notches 302 help reduce the molding difficulty of the clamping structure 232 during the manufacturing process, improve the manufacturability of the clamping structure 232, increase product yield, and thus improve the product qualification rate of the battery cell 20. Multiple discontinuous notches 302 can also greatly reduce the weight of the clamping structure 232, save materials, reduce costs, and also increase the energy density of the battery cell 20.

[0307] In some embodiments of this application, referring to Figures 4, 6, 8, 12 to 14, 21 and 22, the insulating sealing structure 233 includes an insulating member 2333. The insulating member 2333 includes a first insulating portion 2308 and a second insulating portion 2309. The first insulating portion 2308 is injection molded between the first clamping member 2321 and the pole body 231. The second insulating portion 2309 is injection molded on the outer surface 2321a of the clamping groove 2323 formed by the first clamping member 2321, and is partially connected to the first insulating portion 2308 through an intermittent notch 302.

[0308] In the above technical solution, during the injection molding process of the second insulating part 2309 onto the outer surface 2321a of the clamping groove 2323 formed by the first clamping member 2321, the injection molding liquid can enter the gap between the first clamping member 2321 and the pole body 231 through the intermittent notch 302 to form the first insulating part 2308. Thus, the first insulating part 2308 and the second insulating part 2309 can be injection molded in one step, simplifying the assembly process of the pole component 23. Moreover, the intermittent notch 302 is a notch formed on the first clamping member 2321. Compared with the simple opening method, the opening size of the intermittent notch 302 is larger, which can improve the flow rate of the injection molding liquid, thereby improving the molding efficiency of the first insulating part 2308 and the second insulating part 2309, and improving the overall assembly efficiency of the pole component 23.

[0309] In some embodiments of this application, referring to FIG15, the electrode body 231 includes a first metal part 305 and a second metal part 306 made of different materials. The first metal part 305 is located on the side of the second metal part 306 away from the electrode component 22. The second metal part 306 is connected to the electrode component 22. The outer periphery of the first metal part 305 and the outer periphery of the second metal part 306 adjacent to the first metal part 305 are covered with a protective metal layer 307.

[0310] The first metal part 305 and the second metal part 306 can both be metal plates or metal blocks, and are arranged in a stacked manner. The materials of the first metal part 305 and the second metal part 306 can be, but are not limited to, aluminum, copper, lead, zinc alloy, copper-aluminum alloy, etc., wherein the materials of the first metal part 305 and the second metal part 306 are different. For example, the first metal part 305 can be an aluminum component, and the second metal part 306 can be a copper component. For example, referring to FIG15, the first metal part 305 can be a copper block, and the second metal part 306 can be an aluminum plate, with the aluminum plate fixed to the bottom of the copper block.

[0311] The protective metal layer 307 can be made of, but is not limited to, nickel, zinc, tin, chromium, or copper. The protective metal layer 307 can also be a metal plating.

[0312] In the above technical solution, by setting the electrode body 231 to include a first metal part 305 and a second metal part 306 of different materials, the electrode body 231 can be made of a suitable metal as needed. For example, the first metal part 305 and the second metal part 306 can be made of metals with different conductivity. While ensuring the overall conductivity requirements, the cost can be reduced. Lighter metal materials can also be selected to reduce the overall weight of the electrode body 231 and increase the energy density of the battery cell 20. Metal materials with different weldability can also be selected as needed, which is beneficial for welding the electrode body 231 and other electrical connection components, thereby improving the manufacturability of the battery cell 20.

[0313] In some embodiments of this application, the electrode body 231 is a metal component made of the same material throughout. For example, the electrode body 231 can be made entirely of aluminum or entirely of copper. In this technical solution, the electrode body 231 with this structure is relatively simple to manufacture, which can reduce manufacturing costs.

[0314] In some embodiments of this application, referring to Figures 6, 8, 11 to 14, the electrode post 23 defines a receiving groove 235 recessed in the direction away from the electrode post 22, and the electrode post body 231 defines a groove end wall 2351 on the side of the receiving groove 235 away from the electrode post 22. The electrode post 22 includes an active material coating portion 221 and a conductive portion 222, at least a portion of the conductive portion 222 is received in the receiving groove 235 and connected to the groove end wall 2351.

[0315] The receiving groove 235 can refer to a space with a certain size. The groove end wall 2351 can refer to a groove wall surface that forms the receiving groove 235.

[0316] The active material coating part 221 can refer to a component consisting of a current collector and an active material layer coated on the current collector, and may include a positive electrode active material coating part and a negative electrode active material coating part.

[0317] The conductive part 222 can refer to the structure of the current collector that is not coated with an active material layer, and can be understood as a tab, used for electrically connecting to the electrode body 231. The conductive part 222 may be partially located within the receiving groove 235, or it may be entirely located within the receiving groove 235.

[0318] In the above technical solution, since the conductive part 222 of the electrode component 22 needs to occupy a certain space, the receiving groove 235 is defined by the electrode post component 23. At least part of the conductive part 222 is housed in the receiving groove 235 and connected to the groove end wall 2351. Thus, the electrode post component 23 can provide the receiving space for the conductive part 222, saving space in the housing component 21. This is beneficial for arranging a larger active material coating part 221 in the housing component 21. Moreover, the receiving groove 235 is also beneficial for reducing the weight of the electrode post component 23, thereby improving the energy density of the battery cell 20.

[0319] In some embodiments of this application, referring to Figures 6, 8, 11 to 14, the electrode post component 23 further includes an insulating structure 234. The insulating structure 234 is disposed on the side of the clamping structure 232 near the electrode component 22. The insulating structure 234 and the insulating sealing structure 233 together define the groove peripheral wall 2352 of the receiving groove 235.

[0320] In the above technical solution, the insulating structure 234 and the insulating sealing structure 233 jointly define the peripheral wall 2352 of the receiving groove 235, which can form a deeper receiving groove 235, providing more space to accommodate the conductive part 222 and further saving space inside the housing component 21. Since both the insulating structure 234 and the insulating sealing structure 233 have an insulating function, the above structure can also insulate the conductive part 222 from the electrode body 231, which helps to reduce the risk of short circuit and can improve the reliability of the battery cell 20.

[0321] In some embodiments of this application, referring to Figures 4, 14, and 23, the electrode post component 23 further includes an insulating structure 234. The insulating structure 234 is disposed on the side of the clamping structure 232 near the electrode component 22. The electrode post body 231 includes an inner protrusion 2314 located in the inner ring region of the insulating structure 234. The inner protrusion 2314 protrudes relative to the clamping structure 232 toward the inner side of the first shell wall 201. The surface of the inner protrusion 2314 near the electrode component 22 is flush with the surface of the insulating structure 234 near the electrode component 22, or is located on the side of the insulating structure 234 away from the electrode component 22.

[0322] The inner protrusion 2314 of the electrode post can refer to the portion of the electrode post body 231 that protrudes closer to the inner side of the housing component 21, as shown in Figures 4, 14, 15, and 22. For example, referring to Figure 4, the side surface of the inner protrusion 2314 near the electrode component 22 is located on the side of the insulating structure 234 away from the electrode component 22. Referring to Figures 14 and 23, the side surface of the inner protrusion 2314 near the electrode component 22 is flush with the side surface of the insulating structure 234 near the electrode component 22.

[0323] In the above technical solution, by forming an inner protrusion 2314 on the electrode body 231, the bonding area between the electrode body 231 and the clamping structure 232 can be increased, improving connection reliability and enhancing the overall stability and reliability of the electrode component 23. By aligning the inner protrusion 2314 with the surface of the insulating structure 234 near the electrode component 22, less obstruction is reduced around the inner protrusion 2314, making it easier to connect with the electrode component 22, reducing assembly difficulty, improving assembly efficiency, and increasing product yield. Since the inner protrusion 2314 is located on the side of the insulating structure 234 away from the electrode component 22, the insulating structure 234 and the inner protrusion 2314 can form a space to accommodate the electrode component 22, thereby saving internal space in the housing component 21 and increasing the energy density of the battery cell 20.

[0324] In some embodiments of this application, referring to FIG10, the battery cell 20 further includes a pressure relief device 24, which is disposed on the housing component 21 and is located on the same side or opposite side of the terminal component 23.

[0325] The pressure relief device 24 can refer to a component or structure that releases gas after the internal pressure of the housing component 21 reaches a set threshold. The pressure relief device 24 can be a component such as an explosion-proof valve or a pressure relief valve, or it can be a groove or thinning area provided on the shell wall of the housing component 21. For example, referring to FIG10, the pressure relief device 24 can be located on the same side as the pole component 23. Alternatively, the pressure relief device 24 can also be located on a different side from the pole component 23.

[0326] Referring to Figures 3 and 10, the housing component 21 may include a housing 211 and a cover 212, wherein the housing 211 has an opening and the cover 212 closes the opening. The pressure relief device 24 may be provided on either the housing 211 or the cover 212.

[0327] In the above technical solution, by providing a pressure relief device 24 in the housing component 21, the pressure inside the housing component 21 can be released in a timely manner when the pressure is high, reducing the risk of thermal runaway of the battery cell 20 and improving the reliability of the battery cell 20. The pressure relief device 24 can be located on the same side or opposite side of the terminal component 23, which provides more possibilities for its installation, facilitating flexible design and reducing manufacturing costs.

[0328] In some embodiments of this application, referring to Figures 3, 24 and 25, the first shell wall 201 is provided with a mounting hole 201a, and the pole post component 23 is mounted at the mounting hole 201a.

[0329] The clamping structure 232 can serve as a transition structure between the first shell wall 201 and the electrode body 231. Referring to Figures 20 and 25, in this configuration, the electrode body 231 can first be assembled with the clamping structure 232 and the insulating sealing structure 233 to form the electrode component 23. Then, the conductive part 222 (ear) of the electrode component 22 is pulled out of the shell component 21, and the conductive part 222 is connected to the electrode body 231 (the connection method can be, but is not limited to, welding). Finally, the clamping structure 232 is installed into the mounting hole 201a of the first shell wall 201 on the outside of the shell component 21. The connection method between the clamping structure 232 and the first shell wall 201 can be, but is not limited to, welding.

[0330] In the above assembly process, since the shell component 21 is generally thin, especially with the trend of pursuing higher energy density, the thickness of the shell component 21 is gradually reduced. If the connection between the terminal body 231 and the first shell 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 simplifies the installation process of the terminal body 231 and the shell component 21, reduces the probability of damage to the shell component 21 and the terminal body 231 during installation, improves the integrity of the shell component 21, and is conducive to improving the reliability of the battery cell 20. Moreover, as analyzed above, the above solution is also conducive to reducing the thickness of the shell component 21, which is conducive to reducing the weight of the battery cell 20 and increasing the volumetric energy density of the battery cell 20.

[0331] The connection method between the pole body 231 and the conductive part 222 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 clamping structure 232 and the first shell 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.

[0332] This application provides a battery device 100, including a battery cell 20 from any of the preceding embodiments.

[0333] 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.

[0334] In some embodiments of this application, referring to FIG2, the battery device 100 includes a housing 10, a plurality of battery cells 20 are housed in the housing 10, the bottom of the housing 10 is a housing bottom plate, and the terminal post component 23 is disposed on the side of the housing component 21 near the housing bottom plate, or disposed on the side of the housing component 21 away from the housing bottom plate.

[0335] The terminal post 23 of the battery cell 20 is located on the side of the housing component 21 near the bottom plate of the casing 10. This means that the battery cell 20 can be inverted inside the casing 10 (with the terminal post 23 of the battery cell 20 facing downwards). This helps to lower the center of gravity of the battery cell 20, thereby lowering the center of gravity of the entire battery device 100. This improves the stability of the battery device 100 during installation and use, and reduces the risk of displacement or damage to the battery cell due to external forces such as vibration and bumps. In some cases, placing the terminal post 23 of the battery cell 20 on the side of the housing component 21 near the bottom plate of the casing 100 also facilitates heat dissipation of the battery device 100. For example, when the battery device 100 uses bottom heat dissipation, the heat is more likely to concentrate on the terminal post 23. With the above solution, the heat can be more easily dissipated from the bottom of the battery cell 20, improving heat dissipation efficiency. Moreover, the heat can be quickly exchanged away from the terminal post 23, reducing the probability of safety problems caused by overheating of the terminal post 23 and improving the reliability of the battery cell 20.

[0336] The terminal post 23 is located on the side of the housing component 21 opposite to the bottom plate of the casing. This means that the battery cells 20 can be arranged upwards inside the casing 10 (with the terminal post 23 of the battery cells 20 facing upwards). This makes it easier to achieve electrical connections between the battery cells 20. During the assembly of the battery device 100, operators can more easily connect and fix busbars, wires, or other electrical components, improving production efficiency. Moreover, this arrangement also facilitates electrical inspection and maintenance of the battery device 100, making it easier to locate and repair faults. In some applications requiring waterproofing, this arrangement makes it easier to achieve waterproofing. Since the terminal post 23 is located at the highest point of the battery cell 20, the probability of moisture entering the battery cell 20 through the terminal post 23 is reduced. In cases of water accumulation, this reduces the risk of water immersion in the terminal post 23, thus improving the waterproof rating of the battery device 100. Secondly, the battery cell 20 can be arranged facing upwards inside the housing 10, which can also better protect the top of the battery cell 20, reduce the risk of damage to the terminal component 23 when an external object hits the housing 10, and improve the reliability of the battery cell 20.

[0337] In the above technical solution, arranging multiple battery cells 20 upside down or forward within the housing 10 provides more design options and improves the product flexibility of the battery device 100. Positioning the terminal posts 23 of the battery cells 20 on the side of the housing 21 near the bottom plate of the housing helps lower the overall center of gravity of the battery device 100 and facilitates heat dissipation for both the battery cells 20 and the battery device 100, thus improving the reliability of the battery device 100. Positioning the terminal posts 23 on the side of the housing 21 away from the bottom plate of the housing facilitates internal electrical connections within the battery device 100, makes maintenance and repair easier, improves the waterproof and dustproof performance of the battery device 100, and reduces the probability of damage to the battery cells 20 when the bottom of the housing 10 is impacted, further enhancing the reliability of the battery device 100.

[0338] This application provides an electrical device 1000, including a battery device 100 from any of the preceding embodiments, the battery device 100 being used to store or provide electrical energy.

[0339] 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.

[0340] Example 1

[0341] Referring to Figures 3 to 5, 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.

[0342] The housing component 21 includes a first housing wall 201, which has a mounting hole 201a.

[0343] Electrode component 22 is disposed inside housing component 21.

[0344] The pole piece 23 is disposed in the mounting hole 201a of the first housing wall 201, and includes a pole body 231, a clamping structure 232, an insulating sealing structure 233 and an insulating structure 234.

[0345] The electrode body 231 is connected to the electrode component 22. The outline of the electrode body 231 is racetrack-shaped, consisting of a rectangle 303 and two semicircles 304 located at both ends of the length of the rectangle 303. The electrode body 231 includes a main body 2311 and an edge portion 2312 connecting the main body 2311. The edge portion 2312 is arranged circumferentially around the main body 2311, and the thickness of the edge portion 2312 gradually decreases to form a first recess 2312a on the side facing away from the first shell wall 201. The electrode body 231 is a copper-aluminum composite electrode, and a copper plating layer is provided on the circumferential side.

[0346] The clamping structure 232 surrounds the pole body 231 and is connected to the first shell wall 201. The clamping structure 232 is a one-piece molded part, and is formed by riveting a first clamping member 2321 and a second clamping member 2322. The first clamping member 2321 is bent toward the second clamping member 2322 and is located on the side of the second clamping member 2322 away from the first shell wall 201. The first clamping member 2321 and the second clamping member 2322 together form a clamping groove 2323. The clamping groove 2323 clamps the edge portion 2312 of the pole body 231. The clamping groove 2323 has a notch 2323a, and the clamping groove 2323 tightens at the notch 2323a to prevent the pole body 231 from coming out of the notch 2323a. The ratio of the minimum size of the notch 2323a to the maximum size of the clamping groove 2323 is less than 90% along the thickness direction of the first shell wall 201.

[0347] The first clamping member 2321 includes a first arm 2301, a second arm 2302, and a third arm 2303 connected in sequence by bending. The first arm 2301 is connected to the second clamping member 2322, extends away from the second clamping member 2322, and is perpendicular to the first shell wall 201. The second arm 2302 is an arc-shaped arm, and the third arm 2303 extends relative to the second arm 2302 towards the second clamping member 2322. The first arm 2301, the second arm 2302, and the third arm 2303 together with the second clamping member 2322 form a clamping groove 2323. The end of the third arm 2303 away from the second arm 2302 and the end of the second clamping member 2322 away from the first arm 2301 together form a slot 2323a.

[0348] The first clamping member 2321 includes a plurality of riveting portions 301 spaced apart along the direction surrounding the pole post body 231, with an intermittent notch 302 formed between adjacent riveting portions 301. The riveting portions 301 include first riveting portions 3011 located at both ends of the length of the pole post body 231, and second riveting portions 3012 located at both ends of the width of the pole post body 231. The intermittent notch 302 is formed between the first riveting portions 3011 and the second riveting portions 3012, and is positioned opposite to the connection position of the rectangle 303 and the semicircle 304.

[0349] The insulating sealing structure 233 includes a first sealing element 2331, a second sealing element 2332, and an insulating element 2333.

[0350] The first sealing element 2331 is a sealing ring and includes a first part 2306 and a second part 2307 that are bent and connected. The first part 2306 is sealed between the main body 2311 and the second clamping member 2322, and the second part 2307 is sealed between the edge part 2312 and the second clamping member 2322.

[0351] The second sealing element 2332 is a sealing ring, and it is sealed between the first clamping element 2321 and the main body 2311 and the edge part 2312, and it fits into the first recessed part 2312a. The second sealing element 2332 and the first sealing element 2331 are spaced apart.

[0352] The insulating component 2333 is injection molded on the outer surface 2321a of the first clamping component 2321 away from the clamping groove 2323, and partially passes through the intermittent notch 302 to connect with the second sealing component 2332.

[0353] The insulating structure 234 is a plastic part and is disposed between the electrode post body 231 and the electrode component 22. The insulating structure 234 is insulated from and sealed to the second part 2307 of the first sealing member 2331.

[0354] Example 2

[0355] Referring to Figure 13, the structure of the battery cell 20 in Embodiment 2 is largely the same as that of the battery cell 20 in Embodiment 1, except that:

[0356] In the structure of the first clamping member 2321, the second arm 2302 is perpendicular to the first arm 2301 and is connected to the first arm 2301 by an arc transition. The third arm 2303 is connected to the second arm 2302 by an arc transition and is parallel to the first arm 2301.

[0357] The insulating sealing structure 233 includes a first sealing element 2331 and an insulating element 2333.

[0358] The first sealing element 2331 is a sealing ring and includes a first part 2306 and a second part 2307 that are bent and connected. The first part 2306 is sealed between the main body 2311 and the second clamping member 2322, and the second part 2307 is sealed between the edge part 2312 and the second clamping member 2322.

[0359] The insulating component 2333 includes a first insulating portion 2308 and a second insulating portion 2309. The first insulating portion 2308 is injection molded between the first clamping component 2321 and the pole body 231. The second insulating portion 2309 is injection molded on the outer surface 2321a of the first clamping component 2321 away from the clamping groove 2323, and partially passes through the discontinuous notch 302 to connect with the first insulating portion 2308.

[0360] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods 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, The device includes a housing component, an electrode component, and a terminal post component. The electrode component is disposed within the housing component. The housing component includes a first housing wall. The terminal post component is disposed within the first housing wall and includes: The electrode body is connected to the electrode component; A clamping structure surrounds the pole body and is connected to the first shell wall; An insulating and sealing structure is provided, which is both insulating and sealingly fitted between the clamping structure and the electrode body; wherein, the clamping structure includes a first clamping member and a second clamping member connected together, at least one of the first clamping member and the second clamping member being bent toward the other to jointly form a clamping groove; the clamping groove clamps the electrode body, the clamping groove is formed with an opening, and the clamping groove tightens at the opening to prevent the electrode body from coming out of the opening; Wherein, along the thickness direction of the first shell wall, the ratio of the minimum size of the slot to the maximum size of the clamping slot is less than 90%.

2. The battery cell according to claim 1, wherein, The first clamping member includes a first arm, a second arm, and a third arm that are bent and connected in sequence. The first arm is connected to the second clamping member and extends away from the second clamping member. At least one of the second arm and the third arm extends towards the second clamping member. The first arm, the second arm, and the third arm together with the second clamping member form the clamping groove, and the end of the third arm away from the second arm and the end of the second clamping member away from the first arm together form the groove opening.

3. The battery cell according to claim 2, wherein, The second arm is arranged parallel to the first shell wall, and the second arm is bent and connected to both the first arm and the third arm; or, the second arm is an arc-shaped arm that is bent and connected to the first arm and the third arm.

4. The battery cell according to claim 2, wherein, The third arm is set at an angle relative to both the first arm and the first shell wall; or, the third arm is set parallel to the first arm and at an angle to both the first shell wall.

5. The battery cell according to claim 2, wherein, The first arm is positioned perpendicular to the first shell wall.

6. The battery cell according to claim 2, wherein, The second clamping member includes a fourth arm, which is parallel to the first shell wall and together with the first clamping member forms the clamping groove.

7. The battery cell according to claim 6, wherein, The second clamping member further includes a fifth arm, which is bent and connected to the fourth arm and extends toward the first clamping member.

8. The battery cell according to claim 7, wherein, The fifth arm is perpendicular to the first shell wall.

9. The battery cell according to any one of claims 2 to 8, wherein, The pole body includes a main body and an edge portion connecting the main body, the edge portion being located within the clamping groove.

10. The battery cell according to claim 9, wherein, The edge portion is bent relative to the main body portion.

11. The battery cell according to claim 10, wherein, The edge portion is at least partially arranged parallel to the third arm portion.

12. The battery cell according to claim 9, wherein, The edge portion has a first recessed portion, and the third arm portion mates with the first recessed portion.

13. The battery cell according to claim 12, wherein, The third arm protrudes relative to the second arm towards the side closer to the first recess, and is insulated from and sealed to the first recess through the insulating and sealing structure.

14. The battery cell according to claim 12 or 13, wherein, The edge portion also has a second recessed portion, and the second clamping member engages with the second recessed portion.

15. The battery cell according to claim 14, wherein, The second clamping member includes a fourth arm and a fifth arm connected together. The fourth arm is connected to the first arm, and the fifth arm protrudes towards the side near the second recess and is insulated from and sealed to the second recess through the insulating sealing structure.

16. The battery cell according to claim 14 or 15, wherein, The localized thinning of the edge portion forms the first recess and / or the second recess.

17. The battery cell according to any one of claims 1 to 16, wherein, The insulating sealing structure includes a first sealing element, which is sealed between the second clamping element and the pole body.

18. The battery cell according to claim 17, wherein, The first sealing element includes a first part and a second part that are bent and connected. The pole body includes a main body and an edge part. The first part is sealed between the main body and the second clamping member, and the second part is sealed between the edge part and the second clamping member.

19. The battery cell according to claim 18, wherein, The electrode component further includes an insulating structure that is insulated between the electrode body and the electrode component, and the second part is integrally formed with the insulating structure.

20. The battery cell according to claim 17, wherein, The insulating sealing structure further includes a second sealing element, which is sealed between the first clamping member and the pole body, and the second sealing element is spaced apart from the first sealing element.

21. The battery cell according to claim 17, wherein, The insulating sealing structure further includes an insulating component, which includes a first insulating portion disposed between the first clamping member and the pole body.

22. The battery cell according to claim 21, wherein, The insulating component further includes a second insulating portion disposed on the outer surface of the first clamping component opposite to the clamping groove, and connected to the first insulating portion.

23. The battery cell according to claim 22, wherein, The electrode body includes an outer protrusion located in the inner ring region of the first clamping member. The outer protrusion protrudes outward relative to the first clamping member toward the outer side of the first shell wall. The side surface of the outer protrusion away from the electrode component includes a central region and a peripheral region. The peripheral region surrounds the central region. The central region protrudes outward relative to the peripheral region toward the outer side of the first shell wall. The side surface of the second insulating portion away from the electrode component is flush with the peripheral region.

24. The battery cell according to claim 22, wherein, The first insulating part and the second insulating part are either integrally formed or separately formed.

25. The battery cell according to claim 24, wherein, The first insulating portion is injection molded between the first clamping member and the pole body; and / or, the second insulating portion is injection molded on the outer surface of the first clamping member opposite to the clamping groove.

26. The battery cell according to claim 25, wherein, The first insulating portion is injection molded between the first clamping member and the pole body, and the second insulating portion is injection molded on the outer surface of the first clamping member opposite to the clamping groove. The first clamping member has a through hole, and a portion of the second insulating portion passes through the through hole and is connected to the first insulating portion.

27. The battery cell according to any one of claims 1 to 26, wherein, The first clamping member and the second clamping member are integrally formed; and / or, the first clamping member, the second clamping member, and the first shell wall are all integrally formed.

28. The battery cell according to claim 27, wherein, The clamping structure includes an inner ring segment and an outer ring segment surrounding the inner ring segment. The outer ring segment is connected to the first shell wall. A portion of the inner ring segment forms the second clamping member, and another portion is riveted to form the first clamping member.

29. The battery cell according to any one of claims 1 to 28, wherein, The second clamping member has a length L1 in the direction from the first shell wall to the pole body, and a thickness H1, satisfying the relationship: y = -(P·L1) 4 ) / 8E(b·H1 3 / 12); Where y is the deflection of the second clamping member, 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 clamping member, in GPa; b is the circumference of the second clamping member in the circumferential direction of the pole body, in mm.

30. The battery cell according to any one of claims 1 to 29, wherein, The first clamping member includes a plurality of rivet portions spaced apart along the direction surrounding the pole body, with discontinuous gaps formed between adjacent rivet portions.

31. The battery cell according to claim 30, wherein, The outline of the pole body is racetrack shaped, which is composed of a rectangle and two semicircles located at both ends of the length of the rectangle. The riveting part includes a first riveting part located at both ends of the length of the pole body and a second riveting part located at both ends of the width of the pole body. The discontinuous notch is formed between the first riveting part and the second riveting part and is positioned opposite to the connection position of the rectangle and the semicircles.

32. The battery cell according to any one of claims 1 to 29, wherein, The first clamping member is disposed on the side of the second clamping member away from the electrode component, and has an intermittent notch communicating with the clamping groove.

33. The battery cell according to claim 32, wherein, The discontinuous notches are multiple and are spaced apart along the direction of the clamping structure surrounding the pole body.

34. The battery cell according to claim 32 or 33, wherein, The insulating sealing structure includes an insulating component, which includes a first insulating portion and a second insulating portion. The first insulating portion is injection molded between the first clamping member and the pole body. The second insulating portion is injection molded on the outer surface of the clamping groove formed by the first clamping member and is partially connected to the first insulating portion through the discontinuous notch.

35. The battery cell according to any one of claims 1 to 34, wherein, The electrode body includes a first metal part and a second metal part made of different materials. The first metal part is located on the side of the second metal part away from the electrode component. The second metal part is connected to the electrode component. The outer periphery of the first metal part and the outer periphery of the second metal part adjacent to the first metal part are covered with a protective metal layer.

36. The battery cell according to any one of claims 1 to 34, wherein, The pole body is a metal part made of the same material throughout.

37. The battery cell according to any one of claims 1 to 36, wherein, The electrode post component defines a receiving groove recessed in a direction away from the electrode component, the electrode post body defines a groove end wall on the side of the receiving groove away from the electrode component, the electrode component includes an active material coating portion and a conductive portion, at least a portion of the conductive portion is received in the receiving groove and connected to the groove end wall.

38. The battery cell according to claim 37, wherein, The electrode post component also includes an insulating structure disposed on the side of the clamping structure near the electrode component, and the insulating structure and the insulating sealing structure together define the peripheral wall of the receiving groove.

39. The battery cell according to any one of claims 1 to 38, wherein, The electrode post component further includes an insulating structure disposed on the side of the clamping structure near the electrode component. The electrode post body includes an inner protrusion located in the inner ring region of the insulating structure. The inner protrusion protrudes relative to the clamping structure toward the inner side of the first shell wall. The surface of the inner protrusion near the electrode component is flush with the surface of the insulating structure near the electrode component, or located on the side of the insulating structure away from the electrode component.

40. The battery cell according to any one of claims 1-39, wherein, It also includes a pressure relief device, which is located on the housing component and on the same side or opposite side as the pole component.

41. A battery device, wherein, Includes the battery cell according to any one of claims 1-40.

42. The battery device according to claim 41, wherein, The battery device includes a housing, and multiple battery cells are housed within the housing. The bottom of the housing is a bottom plate. The terminal post is located on the side of the housing component near the bottom plate of the housing, or on the side of the housing component away from the bottom plate of the housing.

43. An electrical appliance, wherein, Includes the battery device according to claim 41 or 42, the battery device being used to store or provide electrical energy.

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