A terminal post, a top cover assembly, and a battery

Abstract

This utility model relates to the field of battery technology and discloses an electrode post, a top cover assembly, and a battery. By designing grooves on the electrode post body, the thickness of the electrode post body in the welding area is significantly reduced, thus meeting the material thickness requirements of ultrasonic welding. This allows the electrode post body to be directly welded to the tab without the need for an adapter plate. This innovative design not only avoids the problems of increased internal resistance, excessive temperature rise, and structural complexity caused by traditional adapter plate connection methods, but also significantly reduces the battery's internal resistance and heat generation during charging and discharging, thereby effectively improving battery performance and lifespan. Simultaneously, it simplifies the battery assembly process, reduces manufacturing costs, and improves production efficiency, providing an efficient and reliable solution for the development of battery manufacturing technology.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrode post, a top cover assembly, and a battery. Background Technology

[0002] In current battery manufacturing processes, the connection between the terminal post and the tab is typically achieved using an adapter plate. Specifically, one end of the adapter plate is ultrasonically welded to the tab, and the other end is ultrasonically welded to the terminal post. This connection method has the following problems:

[0003] (1) Large internal resistance: The introduction of the adapter increases the connection path, which leads to an increase in the battery's internal resistance.

[0004] (2) High temperature rise: A large internal resistance will cause the battery to heat up too much during charging and discharging, affecting the battery's performance and lifespan.

[0005] (3) Complex structure: It requires additional adapter pieces, which increases manufacturing costs and assembly difficulty.

[0006] Therefore, optimizing the connection between the electrode post and the electrode tab, reducing internal resistance and temperature rise, and simplifying the structure are urgent problems to be solved in the current battery manufacturing technology field.

[0007] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0008] This utility model provides an electrode post, a top cover assembly, and a battery to solve the problems existing in the prior art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] In a first aspect, the present invention provides an electrode post, including an electrode post body, wherein the electrode post body has a first surface and a second surface disposed opposite to each other;

[0011] The second surface is recessed inward to form a groove;

[0012] The bottom of the groove is used for electrical connection with the electrode via ultrasonic welding.

[0013] Furthermore, in the pole post, the thickness at the groove location is less than the thickness at other locations.

[0014] Furthermore, in the pole post, the groove is located at the center of the second surface.

[0015] Furthermore, in the pole post, the groove has a length of 131 mm and a width of 9 mm.

[0016] Furthermore, the pole has a length of 150mm and a width of 25mm.

[0017] Furthermore, in the pole post, the bottom of the groove is provided with several protrusions.

[0018] Furthermore, in the pole post, the protrusion is tooth-shaped.

[0019] In a second aspect, the present invention provides a top cover assembly, including a top cover sheet and an electrode post as described in the first aspect above;

[0020] The top cover plate is provided with pole hole;

[0021] The electrode body is inserted through the electrode hole.

[0022] Furthermore, the top cover assembly also includes a lower plastic component, a sealing ring, and an upper plastic component;

[0023] The lower plastic part is attached to the lower surface of the top cover sheet;

[0024] The sealing ring is sleeved on the pole body, and the sealing ring is sandwiched between the lower surface of the top cover plate and the pole body;

[0025] The fastener is disposed on the upper surface of the top cover plate and sleeved on the pole body to insulate and separate the top cover plate from the pole body.

[0026] Thirdly, this utility model provides a battery, including a casing, a bare cell, and a top cover assembly as described in the second aspect above.

[0027] The bare battery cell has tabs;

[0028] The housing has a space for accommodating the bare battery cell;

[0029] The top cover assembly covers the opening of the housing.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] This utility model provides an electrode post, a top cover assembly, and a battery. By designing grooves on the electrode post body, the thickness of the electrode post body in the welding area is significantly reduced, thus meeting the material thickness requirements for ultrasonic welding. This allows the electrode post body to be directly welded to the tab without the need for an adapter plate. This innovative design not only avoids the problems of increased internal resistance, excessive temperature rise, and structural complexity caused by traditional adapter plate connection methods, but also significantly reduces the battery's internal resistance and heat generation during charging and discharging, thereby effectively improving battery performance and lifespan. Simultaneously, it simplifies the battery assembly process, reduces manufacturing costs, and improves production efficiency, providing an efficient and reliable solution for the development of battery manufacturing technology.

[0032] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a three-dimensional structure of an electrode post provided in Embodiment 1 of this utility model;

[0035] Figure 2 This is a schematic diagram of the (cross-sectional) structure of a pole provided in Embodiment 1 of this utility model;

[0036] Figure 3 This is a top view structural diagram of a pole provided in Embodiment 1 of this utility model;

[0037] Figure 4 This is an exploded structural diagram of a top cover assembly provided in Embodiment 2 of this utility model;

[0038] Figure 5 This is a schematic diagram of the (cross-sectional) structure of a top cover assembly provided in Embodiment 2 of this utility model;

[0039] Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle.

[0040] Figure label:

[0041] 1. Pole post body, 2. First surface, 3. Second surface, 4. Groove, 5. Protrusion, 6. Top cover plate, 7. Lower plastic part, 8. Sealing ring, 9. Upper plastic part. Detailed Implementation

[0042] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0043] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0044] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0045] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0046] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0047] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0048] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0049] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0051] Example 1

[0052] In view of the deficiencies of the existing technology, the applicant, based on years of practical experience and professional knowledge in the design and manufacturing of this field, and in conjunction with the application of theoretical principles, has actively conducted research and innovation in order to create a technology that can solve the deficiencies of the existing technology. After continuous research, design, and repeated prototype production and improvement, this utility model with practical value has finally been created.

[0053] Please refer to Figure 1-3 This utility model provides an electrode post, including an electrode post body 1, which has a first surface 2 and a second surface 3 disposed opposite to each other. A groove 4 is formed inwardly on the second surface 3, and the bottom of the groove 4 is designed for electrical connection with an electrode tab via ultrasonic welding.

[0054] The core innovation of this embodiment lies in the ingenious optimization of the structure of the electrode body 1. By setting a groove 4 on the second surface 3 of the electrode body 1, the thickness of the electrode body 1 in the welding area is significantly reduced. This structural improvement is crucial because traditional electrodes, due to their large thickness, cannot be directly ultrasonically welded to the electrode tab. This invention, through the design of the groove 4, successfully solves this technical problem, allowing the electrode body 1 to be directly ultrasonically welded to the electrode tab without the need for an adapter plate, achieving an efficient and reliable electrical connection between the electrode body 1 and the electrode tab.

[0055] This innovative design brings many significant benefits. First, it effectively avoids a series of problems associated with traditional adapter connection methods. In traditional connection methods, the introduction of adapters not only increases the connection path, leading to increased internal resistance of the battery, but also causes excessive temperature rise during charging and discharging, thus affecting battery performance and lifespan. Furthermore, the use of adapters complicates the battery structure, increasing manufacturing costs and assembly difficulty. This embodiment, through direct welding, significantly reduces the battery's internal resistance and heat generation during charging and discharging, thereby effectively improving battery performance and lifespan.

[0056] Secondly, this embodiment also optimizes the battery's heat dissipation performance. Because the welding position between the tab and the terminal body 1 is moved further outwards from the bare cell, the welding area dissipates heat more easily, effectively preventing heat accumulation. This is particularly important for improving battery safety and reliability, especially in high-power charging and discharging scenarios, where good heat dissipation performance can significantly reduce the risk of thermal runaway.

[0057] Finally, this embodiment simplifies the battery assembly process, reduces manufacturing costs, and improves production efficiency. By omitting the adapter piece, not only are material and processing costs reduced, but the complexity and error rate of the assembly process are also lowered. This improvement has significant practical implications for battery manufacturers, effectively increasing production efficiency, reducing production costs, and enhancing product market competitiveness.

[0058] In summary, this embodiment provides an efficient and reliable electrode structure. By setting grooves on the electrode body 1, direct ultrasonic welding of the electrode body 1 and the electrode tab is achieved, solving the problems of high internal resistance, high temperature rise, and complex structure in traditional connection methods. At the same time, it optimizes heat dissipation performance, simplifies the assembly process, and reduces manufacturing costs, providing an innovative solution for the development of battery manufacturing technology.

[0059] In one specific embodiment of this example, the structural design of the electrode post has been carefully optimized to ensure that it can effectively achieve ultrasonic welding with the electrode tab while meeting the overall performance requirements of the battery.

[0060] Specifically, the thickness of the groove 4 on the second surface 3 of the electrode body 1 is precisely calculated and designed to meet the stringent material thickness requirements of the ultrasonic welding process. For example, the thickness at the groove 4 can be set to 2mm. This thickness is not fixed but can be flexibly adjusted according to the actual size, capacity, and specific application of the battery. Meanwhile, the thickness at other locations on the electrode body 1 is relatively larger, typically between 5mm and 8mm. This thickness range can also be adjusted according to the actual needs of the battery to ensure that the electrode, while possessing sufficient mechanical strength and conductivity, meets the overall structural and performance requirements of the battery.

[0061] Through this unique structural design, the thickness of the electrode post at the groove 4 position is significantly less than the thickness at other positions, thus creating a thickness difference in the welding area. This thickness difference design is crucial, as it not only ensures that the electrode post at the groove 4 position meets the material thickness limitations for ultrasonic welding, guaranteeing the reliability and stability of the welding process, but also guarantees the overall structural strength and conductivity of the electrode post, avoiding problems such as decreased mechanical properties or insufficient conductivity caused by excessive thinning.

[0062] In summary, this embodiment cleverly balances the relationship between the ultrasonic welding process requirements and the overall performance of the electrode by setting a groove 4 of a specific thickness on the electrode body 1, providing an innovative and practical solution for battery manufacturing technology.

[0063] In one specific embodiment of this invention, the groove 4 is carefully designed and positioned at the center of the second surface 3 of the pole body 1. This positional choice has significant technical implications and practical application value.

[0064] Placing the groove 4 at the center of the second surface 3 ensures a more uniform stress distribution on the electrode body 1 in the welding area, thereby improving the stability and reliability of the welding process. In ultrasonic welding, the transfer and distribution of welding energy play a crucial role in welding quality. Centering the groove 4 allows the welding energy to be more concentrated and evenly applied to the connection between the electrode tab and the electrode body 1, avoiding welding defects caused by uneven energy distribution, such as incomplete welds or insufficient weld strength.

[0065] Furthermore, the centrally located design facilitates the alignment of the tabs with the terminal body 1 during battery assembly. Since the tabs typically require precise alignment with the welding area of ​​the terminal body 1, placing the groove 4 in the center provides a clear and easily identifiable alignment reference, thereby improving assembly efficiency and reducing assembly difficulty and error rates. This design is particularly suitable for automated production environments, significantly improving production efficiency and product quality consistency.

[0066] Meanwhile, placing the groove 4 in the center also has structural advantages. During the charging and discharging process of the battery, the electrode body 1 will be subjected to certain mechanical and electrochemical stresses. Placing the groove 4 in the center can minimize the impact on the overall structural strength of the electrode while ensuring welding performance. This design can achieve efficient welding connection with the tab without weakening the mechanical properties of the electrode.

[0067] In summary, in this embodiment, placing the groove 4 at the center of the second surface 3 not only improves the stability and reliability of the welding process, but also optimizes the assembly process, increases production efficiency, and takes into account both the structural strength and welding performance of the pole.

[0068] Please refer to this again. Figure 3 In one specific embodiment of this invention, the dimensions of the groove 4 are carefully designed to meet specific requirements for battery performance optimization. Specifically, the length (n) of the groove 4 is 131 mm and the width (m) is 9 mm. These dimensional parameters are not arbitrarily chosen, but determined based on a comprehensive consideration of the overall battery performance and structural stability.

[0069] The length and width of the groove 4 have certain requirements, the main purpose of which is to increase the width of the tab and the welding area between the tab and the terminal body 1. By increasing the welding area, the contact resistance between the tab and the terminal can be significantly reduced, thereby effectively reducing the internal resistance of the battery. Reducing internal resistance is crucial for improving battery performance. It not only reduces energy loss during charging and discharging, improving battery efficiency, but also reduces temperature rise caused by excessive internal resistance, thus extending battery life.

[0070] To ensure that the groove 4 can be made large enough in both length and width, while guaranteeing the structural strength and overall performance of the electrode body 1 in the welding area, the dimensions of the electrode body 1 have also been rigorously designed. Specifically, the length (L) of the electrode is designed to be 150mm and the width (W) to be 25mm. These dimensional parameters have been precisely calculated and optimized to ensure that the electrode body 1 has sufficient mechanical strength and conductivity to meet the battery's usage requirements under various operating conditions, while still allowing for the creation of a large-sized groove.

[0071] The length and width of the terminal post are designed to match the dimensions of the groove 4. This overall structural design fully considers the battery's performance, safety, and reliability. By rationally setting the dimensions of the terminal post and the groove, not only can efficient welding of the tab and the terminal post be achieved and internal resistance reduced, but the stability and safety of the battery during long-term use can also be ensured.

[0072] In one specific embodiment of this invention, to further improve the welding strength and reliability between the electrode tab and the electrode body 1, the bottom of the groove 4 is designed to have several protrusions 5. These protrusions 5 significantly increase the welding contact area between the electrode tab and the electrode body 1, thereby effectively improving welding strength and stability.

[0073] Specifically, these protrusions 5 can form more contact points and welding areas with the surface of the electrode tab during the welding process. By increasing these additional contact points, the ultrasonic energy can be more evenly distributed between the electrode tab and the electrode body 1 during welding, thereby achieving a stronger welding effect.

[0074] Furthermore, the design of protrusion 5 improves energy transfer efficiency during the welding process. Effective energy transfer is crucial for forming high-quality weld joints in ultrasonic welding. The presence of protrusion 5 guides ultrasonic energy to act more concentratedly on the welding area, avoiding excessive energy dispersion, thereby improving welding efficiency and quality.

[0075] From a structural perspective, the design of the protrusion 5 does not negatively impact the overall structural strength of the pole body 1. On the contrary, by rationally designing the shape and distribution density of the protrusion 5, welding performance can be significantly improved without weakening the strength of the pole body 1. This design is not only suitable for manual welding operations but also adapts well to automated welding production lines, improving production efficiency and the consistency of welding quality.

[0076] In summary, in this embodiment, the bottom of the groove 4 is provided with several protrusions 5. This innovative design significantly improves the strength and reliability of the weld by increasing the welding area between the electrode tab and the electrode body 1. At the same time, the design of the protrusions 5 also optimizes the energy transfer efficiency during the welding process and improves the welding quality.

[0077] In one embodiment of this invention, the protrusion 5 is toothed.

[0078] Although this application frequently uses terms such as pole body and groove, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0079] This utility model provides an electrode post that, by designing grooves on the electrode post body, significantly reduces the thickness of the electrode post body in the welding area, thereby meeting the material thickness requirements of ultrasonic welding. This allows the electrode post body to be directly welded to the tab without the need for an adapter plate. This innovative design not only avoids the problems of increased internal resistance, excessive temperature rise, and structural complexity associated with traditional adapter plate connection methods, but also significantly reduces the battery's internal resistance and heat generation during charging and discharging, effectively improving battery performance and lifespan. Simultaneously, it simplifies the battery assembly process, reduces manufacturing costs, and improves production efficiency, providing an efficient and reliable solution for the development of battery manufacturing technology.

[0080] Example 2

[0081] Please refer to Figure 4-6 This utility model provides a top cover assembly, including a top cover sheet 6 and an electrode post as provided in Embodiment 1 above;

[0082] The top cover plate 6 is one of the core components of the battery top cover assembly. Its main functions are to provide sealing and structural support for the battery, and to provide mounting positions for the terminals. To achieve a fixed connection between the terminals and the top cover plate 6, a terminal hole is specially provided on the top cover plate 6. The size and shape of this terminal hole are precisely designed to ensure that it matches the outer contour of the terminal body 1, thereby achieving stable installation of the terminal.

[0083] The electrode body 1, as an important component of the battery, has had its structure and function described in detail in Embodiment 1. In this embodiment, the electrode body 1 is connected to the electrode hole on the top cover plate 6 through its outer surface. This connection method not only ensures the secure installation of the electrode in the top cover assembly, but also guarantees the stability and sealing of the overall battery structure.

[0084] In practical implementation, the outer surface of the electrode body 1 and the inner surface of the electrode hole can be tightly fitted to prevent leakage of electrolyte inside the battery and ensure the safety of the battery during charging and discharging. Furthermore, the design of the electrode hole can be adjusted according to the specific model and size of the battery to meet the needs of different battery specifications.

[0085] In summary, the top cover assembly provided in Embodiment 2 of this utility model achieves an optimized design of the battery top cover assembly by cleverly combining the terminal body 1 and the top cover plate 6. This design not only improves the overall performance and safety of the battery, but also facilitates battery manufacturing and assembly, and has significant practical application value.

[0086] In one embodiment of this invention, the electrode post is a positive electrode post, and the top cover assembly further includes a lower plastic part 7, a sealing ring 8, and an upper plastic part 9 to achieve better sealing performance and insulation effect, while ensuring the overall structural stability and reliability of the assembly.

[0087] The lower plastic component 7 is an important part of the top cover assembly, and its main function is to provide additional support and protection for the top cover sheet 6. In terms of specific structural design, the lower plastic component 7 is tightly fitted to the lower surface of the top cover sheet 6, forming a stable underlying structure. This fitted design not only enhances the overall strength of the top cover assembly, but also provides a solid foundation for subsequent assembly.

[0088] To ensure the battery's sealing performance and prevent electrolyte leakage or external contaminants from entering the battery, the top cover assembly is specially designed with a sealing ring 8. The sealing ring 8 is made of a highly elastic, chemically resistant material, effectively resisting the erosion of the battery's internal electrolyte while maintaining good sealing performance.

[0089] During assembly, the sealing ring 8 is fitted onto the outer surface of the terminal body 1 and sandwiched between the lower surface of the top cover plate 6 and the terminal body 1. This design allows the sealing ring 8 to form a reliable sealing barrier between the terminal and the top cover plate, effectively preventing the penetration of liquids and gases, thereby ensuring the sealing performance and safety of the battery under various operating conditions.

[0090] The upper plastic component 9 is another key part of the top cover assembly. Its main function is to provide insulation protection for the poles and ensure electrical isolation between the poles and the top cover plate 6. The upper plastic component 9 is made of high-performance insulating material and has good electrical insulation performance and mechanical strength.

[0091] In terms of specific structural design, the upper plastic component 9 is disposed on the upper surface of the top cover plate 6 and sleeved on the outer surface of the terminal body 1. This design completely separates the terminal body 1 from the top cover plate 6, preventing electrical short circuits between them and ensuring safe battery operation. Simultaneously, the sleeved structure of the upper plastic component 9 also provides additional mechanical support for the terminal, further enhancing the overall stability of the top cover assembly.

[0092] In summary, in this embodiment, the top cover assembly, through the rational configuration of the lower plastic part 7, the sealing ring 8, and the upper plastic part 9, achieves reliable connection, sealing protection, and electrical insulation between the terminal post and the top cover plate 6. This design not only improves the overall performance and safety of the battery but also provides an efficient and reliable solution for battery manufacturing and assembly, possessing significant practical application value.

[0093] Example 3

[0094] This utility model embodiment provides a battery whose overall structural design fully considers battery performance, safety, and reliability, aiming to provide users with an efficient and stable energy storage solution. The battery mainly includes the following key components: a casing, bare battery cells, and a top cover assembly as provided in Embodiment 2 above.

[0095] The casing is the external protective structure of the battery, and its main function is to provide a safe and stable housing for the bare cells inside. The casing design not only needs to possess good mechanical strength to withstand external impacts and pressures, but also excellent sealing performance to prevent the external environment from affecting the battery's internal structure. Therefore, the casing is made of high-strength, corrosion-resistant materials, and its structural integrity and sealing are ensured through precise manufacturing processes.

[0096] The housing contains a space designed to accommodate the bare battery cell. The size and shape of this space are carefully designed to ensure the cell is securely installed without displacement or movement during battery operation. Furthermore, the opening in the housing is designed for a sealed connection with the top cover assembly, thus achieving a completely sealed enclosure of the battery.

[0097] The bare cell is the core component of the battery, responsible for storing and releasing electrical energy. The design and manufacturing of the bare cell directly affect the battery's performance and lifespan. In this embodiment, the bare cell has tabs, which are key components for electrically connecting the bare cell to external circuits. The tabs need to be designed to meet high conductivity and good mechanical strength requirements to ensure the stability and safety of the battery during charging and discharging.

[0098] The bare cell is installed in the space inside the casing, and its tight fit with the casing ensures its stability during battery operation. The tabs of the bare cell are electrically connected to the grooves 4 of the terminal body 1 in the top cover assembly by ultrasonic welding, thereby realizing the transmission and control of electrical energy inside the battery.

[0099] The top cover assembly is another key component of the battery. Its main function is to provide sealed protection for the battery and to realize the electrical connection between the battery's internal and external circuits. As described in Embodiment 2 above, the top cover assembly includes components such as a top cover sheet, terminals, a lower plastic part, a sealing ring, and an upper plastic part. Through careful design and assembly, these components achieve the sealing, insulation, and mechanical stability of the top cover assembly.

[0100] In this embodiment, the top cover assembly covers the opening of the housing. By sealing the top cover assembly to the housing, the bare battery cells inside are completely encapsulated within the housing, thus achieving overall battery sealing. This sealing design not only effectively prevents the external environment from affecting the battery's internal structure but also ensures the battery's safety during operation.

[0101] The groove 4 of the terminal body 1 in the top cover assembly is electrically connected to the tab of the bare cell, realizing the transmission of electrical energy inside the battery. By optimizing the connection method between the terminal body 1 and the tab, this invention can significantly reduce the internal resistance of the battery, improve the charging and discharging efficiency of the battery, and reduce temperature rise, thereby extending the battery's service life.

[0102] It is understood that the top cover assembly has a single pole design, and the pole is a positive pole. Therefore, the negative pole or negative lead-out structure of the battery is designed at the other end of the housing relative to the top cover assembly.

[0103] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A pole, characterized in that Includes a pole body (1), the pole body (1) having a first surface (2) and a second surface (3) disposed opposite to each other; The second surface (3) is recessed inward to form a groove (4); The bottom of the groove (4) is used to make an electrical connection with the electrode by ultrasonic welding.

2. The pole post according to claim 1, characterized in that, In the pole post, the thickness at the groove (4) position is less than the thickness at the other positions.

3. The pole post according to claim 1, characterized in that, The groove (4) is located at the center of the second surface (3).

4. The pole post according to claim 1, characterized in that, The groove (4) is 131 mm long and 9 mm wide.

5. The electrode post according to claim 4, characterized in that, The pole is 150mm long and 25mm wide.

6. The pole post according to claim 1, characterized in that, The bottom of the groove (4) is provided with several protrusions (5).

7. The pole post according to claim 6, characterized in that, The protrusion (5) is tooth-shaped.

8. A top cover assembly, characterized in that, Includes a top cover plate (6) and an electrode post as described in any one of claims 1-7; The top cover plate (6) is provided with pole hole; The pole body (1) is inserted through the pole hole.

9. The top cover assembly according to claim 8, characterized in that, It also includes a lower plastic part (7), a sealing ring (8), and an upper plastic part (9); The lower plastic part (7) is attached to the lower surface of the top cover piece (6); The sealing ring (8) is sleeved on the pole body (1), and the sealing ring (8) is sandwiched between the lower surface of the top cover plate (6) and the pole body (1); The fastener is disposed on the upper surface of the top cover plate (6) and sleeved on the pole body (1) to insulate and separate the top cover plate (6) from the pole body (1).

10. A battery, characterized in that, Includes a housing, bare battery cells, and a top cover assembly as described in any one of claims 8-9; The bare battery cell has tabs; The housing has a space for accommodating the bare battery cell; The top cover assembly covers the opening of the housing.

Images