Pole, top cover assembly and battery

Abstract

The invention relates to the technical field of batteries, and discloses a pole column, a top cover assembly and a battery, a groove is designed on a pole column body, and the thickness of the pole column body in a welding area is obviously reduced due to the arrangement of the groove, so that the requirement of ultrasonic welding on the material thickness is met, and the pole column body does not need to pass through an adapter piece any more; but can be directly welded with the tabs. The innovative design not only avoids the problems of increased internal resistance, overhigh temperature rise, complex structure and the like caused by a traditional adapter piece connection mode, but also remarkably reduces the internal resistance of the battery and reduces heat generated in the charging and discharging process, thereby effectively improving the performance of the battery and prolonging the service life of the battery. And meanwhile, the assembly process of the battery is simplified, the manufacturing cost is reduced, the production efficiency is improved, and an efficient and reliable solution is provided for the development of a battery manufacturing technology.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a terminal post, a top cover assembly and a battery. Background Art

[0002] In the existing battery manufacturing process, the connection between the terminal post and the tab is usually achieved through 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) Relatively large internal resistance: Due to the introduction of the adapter plate, the connection path is increased, resulting in an increase in the internal resistance of the battery.

[0004] (2) Higher temperature rise: The relatively large internal resistance will cause the battery to have too high a temperature rise during charging and discharging, affecting the performance and lifespan of the battery.

[0005] (3) Complex structure: An additional adapter plate is required, increasing the manufacturing cost and assembly difficulty.

[0006] Therefore, how to optimize the connection method between the terminal post and the tab, reduce the internal resistance and temperature rise, and simplify the structure at the same time, is an urgent problem to be solved in the current battery manufacturing technology field.

[0007] The above information is given as background information only to assist in understanding the present disclosure, and does not determine or admit whether any of the above content can be used as prior art relative to the present disclosure. Summary of the Invention

[0008] The present invention provides a terminal post, a top cover assembly and a battery to solve the problems existing in the prior art.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] In a first aspect, the present invention provides a terminal post, including a terminal post body, and the terminal post body has a first surface and a second surface which are oppositely arranged;

[0011] A groove is formed by inward depression on the second surface;

[0012] The bottom of the groove is used for electrically connecting with the tab through ultrasonic welding.

[0013] Further, in the terminal post, the thickness at the position of the groove is smaller than the thickness at the remaining positions.

[0014] Further, in the terminal post, the groove is located at the central position of the second surface.

[0015] Further, in the terminal post, the length of the groove is 131 mm and the width is 9 mm.

[0016] Further, in the terminal post, the length of the terminal post is 150 mm and the width is 25 mm.

[0017] Further, in the terminal post, a plurality of protrusions are provided on the bottom of the groove.

[0018] Further, in the terminal post, the protrusions are tooth-shaped.

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

[0020] The top cover sheet is provided with a terminal post hole;

[0021] The terminal post body passes through the terminal post hole.

[0022] Further, the top cover assembly further includes a lower plastic part, a sealing ring and an upper plastic part;

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

[0024] The sealing ring is sleeved on the terminal post body, and the sealing ring is clamped between the lower surface of the top cover sheet and the terminal post body;

[0025] The fixing part is arranged on the upper surface of the top cover sheet and sleeved on the terminal post body to insulate and separate the top cover sheet and the terminal post body.

[0026] In a third aspect, the present invention provides a battery, including a housing, a bare battery cell and a top cover assembly as provided in the second aspect above;

[0027] The bare battery cell has electrode tabs;

[0028] The housing forms 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] A kind of terminal post, top cover assembly and battery provided by the present invention, by designing a groove on the terminal post body, the setting of the groove significantly reduces the thickness of the terminal post body in the welding area, thus meeting the requirements of ultrasonic welding for the material thickness, and achieving the purpose that the terminal post body can be directly welded to the tab without using a transition piece anymore. This innovative design not only avoids the problems such as increased internal resistance, excessive temperature rise and complex structure brought by the traditional transition piece connection method, but also significantly reduces the internal resistance of the battery, reduces the heat generation during the charge and discharge process, thereby effectively improving the performance and service life of the battery. At the same time, it simplifies the battery assembly process, reduces the manufacturing cost, improves the production efficiency, and provides an efficient and reliable solution for the development of battery manufacturing technology.

[0032] The present invention has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description. These accompanying drawings and detailed description are used together to explain the specific principles of the present invention. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0034] Figure 1 It is a (three-dimensional) structure schematic diagram of a terminal post provided by Embodiment 1 of the present invention;

[0035] Figure 2 It is a (cross-sectional) structure schematic diagram of a terminal post provided by Embodiment 1 of the present invention;

[0036] Figure 3 It is a (top view) structure schematic diagram of a terminal post provided by Embodiment 1 of the present invention;

[0037] Figure 4 It is a (exploded) structure schematic diagram of a top cover assembly provided by Embodiment 2 of the present invention;

[0038] Figure 5 It is a (cross-sectional) structure schematic diagram of a top cover assembly provided by Embodiment 2 of the present invention;

[0039] Figure 6 is Figure 5 The enlarged structure schematic diagram at position A in

[0040] Reference Signs:

[0041] The pole column body 1, the first surface 2, the second surface 3, the groove 4, the protrusion 5, the top cover piece 6, the lower plastic part 7, the sealing ring 8, the upper plastic part 9. Detailed implementation manners

[0042] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, etc., the following will be described in detail in combination with the listed specific embodiments and with reference to the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only used as examples and cannot be used to limit the protection scope of this application.

[0043] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0044] Unless otherwise defined, the meanings of the technical terms used in this article are the same as those generally understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this article is only to describe specific embodiments and is not intended to limit this application.

[0045] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

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

[0047] Without more limitations, in this application, the expressions such as "including", "comprising", "having" or other similar expressions used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be other elements in the process, method or product including the said elements, so that the process, method or product including a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include the elements inherent in this process, method or product.

[0048] In this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically defined.

[0049] In the description of the embodiments of this application, the spatially 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", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of this application or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of this application.

[0050] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms such as "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "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 directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which this application belongs, the specific meanings of the above terms in the embodiments of this application can be understood according to specific situations.

[0051] Embodiment 1

[0052] In view of the defects existing in the above-mentioned prior art, based on the rich practical experience and professional knowledge in the design and manufacturing of this field for many years, and in cooperation with the application of theory, the applicant actively conducts research and innovation in the hope of creating a technology that can solve the defects in the prior art. After continuous research, design, and repeated sample making and improvement, the present invention with practical value is finally created.

[0053] Please refer to Figures 1-3 , an embodiment of the present invention provides a terminal post, including a terminal post body 1, and the terminal post body 1 has a first surface 2 and a second surface 3 arranged opposite to each other. On the second surface 3, a groove 4 is recessed inward, and the bottom of the groove 4 is designed to be electrically connected to a tab through ultrasonic welding.

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

[0055] This innovative design brings many remarkable beneficial effects. First of all, it effectively avoids a series of problems brought about by the traditional connection method using a transition piece. In the traditional connection method, due to the introduction of the transition piece, not only does it increase the connection path, resulting in an increase in the internal resistance of the battery, but also during the charge and discharge process, the large internal resistance will cause excessive temperature rise, thereby affecting the performance and service life of the battery. In addition, the use of the transition piece also makes the battery structure more complex, increasing the manufacturing cost and assembly difficulty. However, in this embodiment, through the direct welding method, the internal resistance of the battery is significantly reduced, and the heat generation during the charge and discharge process is reduced, thus effectively improving the performance and service life of the battery.

[0056] Secondly, this embodiment also optimizes the heat dissipation performance of the battery. Since the welding position between the tab and the terminal body 1 moves outward away from the bare battery cell, the welding area is more likely to dissipate heat, effectively preventing heat accumulation. This is particularly important for improving the safety and reliability of the battery. Especially in high-power charge and discharge scenarios, good heat dissipation performance can significantly reduce the risk of the battery experiencing thermal runaway.

[0057] Finally, this embodiment simplifies the battery assembly process, reduces the manufacturing cost, and improves the production efficiency. By omitting the transition piece as a component, not only are the material cost and processing cost reduced, but also the complexity and error rate during the assembly process are reduced. This improvement has important practical significance for battery manufacturing enterprises, which can effectively improve the production efficiency, reduce the production cost, and enhance the market competitiveness of the products.

[0058] In summary, this embodiment provides an efficient and reliable terminal structure. By setting a groove on the terminal body 1, direct ultrasonic welding between the terminal body 1 and the tab is achieved, solving problems such as large internal resistance, high temperature rise, and complex structure in the traditional connection method. At the same time, the heat dissipation performance is optimized, the assembly process is simplified, and the manufacturing cost is reduced, providing an innovative solution for the development of battery manufacturing technology.

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

[0060] Specifically, the thickness at the position of the groove 4 provided on the second surface 3 of the terminal post body 1 is precisely calculated and designed to meet the strict requirements of the ultrasonic welding process for the material thickness. For example, the thickness at the position of the groove 4 can be set to 2 mm. This thickness value is not fixed and can be flexibly adjusted according to the actual size, capacity, and specific application scenarios of the battery. At the same time, the thickness at the remaining positions of the terminal post body 1 is relatively large, usually between 5 mm and 8 mm. This thickness range can also be adjusted accordingly according to the actual needs of the battery to ensure that while the terminal post has sufficient mechanical strength and electrical conductivity, it can meet the overall structural and performance requirements of the battery.

[0061] Through this unique structural design, the thickness of the terminal post at the position of the groove 4 is significantly smaller than that at the remaining positions, thus forming a thickness difference in the welding area. The design of this thickness difference is crucial. It not only enables the terminal post to meet the thickness limitation of the ultrasonic welding for the material at the position of the groove 4, ensuring the reliability and stability of the welding process, but also guarantees the overall structural strength and electrical conductivity of the terminal post, avoiding problems such as a decline in mechanical properties or insufficient electrical conductivity caused by excessive thinning.

[0062] In summary, in this embodiment, by setting the groove 4 with a specific thickness on the terminal post body 1, the relationship between the requirements of the ultrasonic welding process and the overall performance of the terminal post is skillfully balanced, providing an innovative and practical solution for battery manufacturing technology.

[0063] In one specific implementation of this embodiment, the groove 4 is carefully designed and set at the central position of the second surface 3 of the terminal post body 1. This position selection has important technical significance and practical application value.

[0064] Setting the groove 4 at the central position of the second surface 3 can ensure that the force on the terminal post body 1 in the welding area is more uniform, thereby improving the stability and reliability of the welding process. During the ultrasonic welding process, the transmission and distribution of the welding energy play a key role in the welding quality. Placing the groove 4 at the central position can make the welding energy act more concentratedly and uniformly on the connection part between the tab and the terminal post body 1, avoiding welding defects caused by uneven distribution of the welding energy, such as poor welding and insufficient solder joint strength.

[0065] In addition, the design of the central position also facilitates the alignment operation of the tab and the pole body 1 during battery assembly. Since the tab usually needs to be accurately docked with the welding area of the pole body 1, setting the groove 4 at the central position can provide a clear and easily recognizable alignment reference for the tab, thereby improving the assembly efficiency, reducing the assembly difficulty and error rate. This design is particularly suitable for the automated production environment, which can significantly improve the production efficiency and the consistency of product quality.

[0066] At the same time, setting the groove 4 at the central position also has structural advantages. During the charging and discharging process of the battery, the pole body 1 will bear certain mechanical stress and electrochemical stress. Placing the groove 4 at the central position can minimize the impact on the overall structural strength of the pole while ensuring the welding performance. This design can achieve an efficient welding connection with the tab without weakening the mechanical properties of the pole.

[0067] In summary, in this embodiment, setting the groove 4 at the central position of the second surface 3 can not only improve the stability and reliability of the welding process, but also optimize the assembly process, improve the production efficiency, and at the same time take into account the structural strength and welding performance of the pole.

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

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

[0070] In order to ensure that the groove 4 with a large enough length and width can be opened, while ensuring the structural strength and overall performance of the pole body 1 in the welding area, the size of the pole body 1 has also been strictly designed. Specifically, the length (L) of the pole is designed to be 150 mm, and the width (W) is 25 mm. These dimensional parameters are accurately calculated and optimized to ensure that the pole body 1 has sufficient mechanical strength and electrical conductivity to meet the usage requirements of the battery under various working conditions on the premise of meeting the requirement of opening a larger-sized groove.

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

[0072] In one specific implementation manner of this embodiment, in order to further improve the welding firmness and reliability between the tab and the terminal post body 1, the bottom of the groove 4 is designed to have a number of protrusions 5. The setting of these protrusions 5 can significantly increase the welding contact area between the tab and the terminal post body 1, thereby effectively improving the welding strength and stability.

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

[0074] In addition, the design of the protrusions 5 can also improve the energy transfer efficiency during the welding process. During ultrasonic welding, the effective transfer of energy is crucial for forming high-quality solder joints. The presence of the protrusions 5 can guide the ultrasonic energy to act more concentratedly on the welding part, avoiding excessive dispersion of energy, thereby improving the welding efficiency and quality.

[0075] From a structural perspective, the design of the protrusions 5 will not have a negative impact on the overall structural strength of the terminal post body 1. On the contrary, by reasonably designing the shape and distribution density of the protrusions 5, the welding performance can be significantly improved without weakening the strength of the terminal post body 1. This design is not only applicable to manual welding operations but also can well adapt to automated welding production lines, improving production efficiency and the consistency of welding quality.

[0076] In summary, in this embodiment, a number of protrusions 5 are provided at the bottom of the groove 4. This innovative design significantly improves the welding firmness and reliability by increasing the welding area between the tab and the terminal post 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 implementation manner of this embodiment, the protrusions 5 are tooth-shaped.

[0078] Although terms such as terminal post body and groove are used more frequently in this application, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0079] An end post provided by an embodiment of the present invention has a groove designed on the end post body. The setting of the groove significantly reduces the thickness of the end post body in the welding area, thereby meeting the requirements of ultrasonic welding for material thickness and achieving the purpose that the end post body can be directly welded to the tab without using a transition piece. This innovative design not only avoids problems such as increased internal resistance, excessive temperature rise, and complex structure caused by the traditional transition piece connection method, but also significantly reduces the internal resistance of the battery, reduces heat generation during charge and discharge, and thus effectively improves the performance and service life of the battery. At the same time, it simplifies the battery assembly process, reduces manufacturing costs, improves production efficiency, and provides an efficient and reliable solution for the development of battery manufacturing technology.

[0080] Embodiment 2

[0081] Please refer to Figures 4-6 , an embodiment of the present invention provides a top cover assembly, including a top cover sheet 6 and an end post as provided in the above Embodiment 1;

[0082] The top cover sheet 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 an installation position for the end post. In order to achieve the fixed connection between the end post and the top cover sheet 6, a post hole is specifically provided on the top cover sheet 6. The size and shape of the post hole are precisely designed to ensure that it fits the outer contour of the end post body 1, thereby realizing the stable installation of the end post.

[0083] The end post body 1, as an important part of the battery, its structure and functions have been elaborated in detail in Embodiment 1. In this embodiment, the end post body 1 is connected through its outer surface to the post hole on the top cover sheet 6. This connection method not only ensures the firm installation of the end post in the top cover assembly, but also guarantees the stability and sealing of the overall battery structure.

[0084] In the specific implementation process, a tight fit can be adopted between the outer surface of the end post body 1 and the inner surface of the post hole to prevent the leakage of the battery internal electrolyte and ensure the safety of the battery during charge and discharge. In addition, the design of the post hole can be adjusted according to the specific model and size of the battery to meet the requirements of different specifications of batteries.

[0085] In summary, the top cover assembly provided by Embodiment 2 of the present invention realizes the optimized design of the battery top cover assembly by cleverly combining the end post body 1 and the top cover sheet 6. This design not only improves the overall performance and safety of the battery, but also provides convenience for the manufacturing and assembly of the battery, and has important practical application value.

[0086] In an implementation manner of this embodiment, the terminal post is a positive terminal 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 part 7 is an important component of the top cover assembly, and its main function is to provide additional support and protection for the top cover plate 6. In the specific structural design, the lower plastic part 7 is closely attached to the lower surface of the top cover plate 6 to form a solid bottom layer structure. This attachment 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 sealing performance of the battery and prevent electrolyte leakage or external contaminants from entering the battery interior, the top cover assembly is also specially designed with a sealing ring 8. The sealing ring 8 is made of a highly elastic and chemically resistant material, which can effectively resist the erosion of the electrolyte inside the battery while maintaining good sealing performance.

[0089] During the assembly process, the sealing ring 8 is sleeved on the outer surface of the terminal post body 1 and clamped between the lower surface of the top cover plate 6 and the terminal post body 1. This design enables the sealing ring 8 to form a reliable sealing barrier between the terminal post and the top cover plate, effectively preventing the penetration of liquids and gases, thereby ensuring the sealing and safety of the battery under various working conditions.

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

[0091] In the specific structural design, the upper plastic part 9 is arranged on the upper surface of the top cover plate 6 and sleeved on the outer surface of the terminal post body 1. Through this design, the upper plastic part 9 can completely separate the terminal post body 1 from the top cover plate 6, preventing electrical short circuit between the two, thereby ensuring the safe operation of the battery. At the same time, the sleeved structure of the upper plastic part 9 can also provide additional mechanical support for the terminal post, further enhancing the overall stability of the top cover assembly.

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

[0093] Embodiment Three

[0094] An embodiment of the present invention provides a battery. Its overall structural design fully considers the performance, safety, and reliability of the battery, aiming to provide users with an efficient and stable energy storage solution. The battery mainly includes the following key components: a housing, a bare battery cell, and a top cover assembly as provided in the second embodiment above.

[0095] The housing is the external protection structure of the battery. Its main function is to provide a safe and stable accommodation space for the bare battery cell inside the battery. The design of the housing not only needs to have good mechanical strength to resist external impacts and pressures, but also needs to have excellent sealing performance to prevent the influence of the external environment on the inside of the battery. For this reason, the housing is made of high-strength and corrosion-resistant materials, and its structural integrity and sealing performance are ensured through precise manufacturing processes.

[0096] A space for accommodating the bare battery cell is formed inside the housing. The size and shape of this space are carefully designed to ensure that the bare battery cell can be stably installed therein and will not be displaced or shaken during the operation of the battery. In addition, the opening part of the housing is designed for sealed connection with the top cover assembly, thereby realizing the sealed packaging of the entire battery.

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

[0098] The bare battery cell is installed in the space inside the housing. Through close cooperation with the housing, its stability during the operation of the battery is ensured. The tabs of the bare battery cell are electrically connected to the groove 4 of the pole column 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 realize the electrical connection between the inside of the battery and the external circuit. As described in the second embodiment above, the top cover assembly includes components such as a top cover sheet, a pole column, a lower plastic part, a sealing ring, and an upper plastic part. These components are carefully designed and assembled to achieve the sealing, insulation, and mechanical stability of the top cover assembly.

[0100] In this embodiment, the top cover assembly covers the opening part of the housing. By sealingly connecting the top cover assembly to the housing, the bare battery cells inside the battery are completely encapsulated inside the housing, thereby achieving the overall sealing of the battery. This sealing design can not only effectively prevent the influence of the external environment on the inside of the battery, but also ensure the safety of the battery during operation.

[0101] The groove 4 of the pole column body 1 in the top cover assembly is electrically connected to the pole ear of the bare battery cell directly to realize the transmission of electrical energy inside the battery. By optimizing the connection method between the pole column body 1 and the pole ear, the present invention can significantly reduce the internal resistance of the battery, improve the charge and discharge efficiency of the battery, and reduce the temperature rise problem, thereby prolonging the service life of the battery.

[0102] It can be understood that the top cover assembly is designed with a single pole column, and this pole column is the positive pole column. Therefore, the negative pole column or the negative pole 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 the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as any technical solutions directly or indirectly implementing the above embodiments in other related technical fields, are all included in the patent protection scope of this application.

Claims

1. A terminal post, characterized in that, It includes a terminal post body (1), and the terminal post body (1) has a first surface (2) and a second surface (3) which are oppositely arranged; The second surface (3) is recessed inward to form a groove (4); The bottom of the groove (4) is used for electrically connecting with a tab through ultrasonic welding.

2. The terminal post according to claim 1, wherein In the terminal post, the thickness at the position of the groove (4) is less than the thickness at other positions.

3. The terminal post according to claim 1, wherein The groove (4) is located at the central position of the second surface (3).

4. The terminal post according to claim 1, characterized in that, The length of the groove (4) is 131 mm and the width is 9 mm.

5. The terminal post according to claim 4, characterized in that, The length of the terminal post is 150 mm and the width is 25 mm.

6. The terminal post according to claim 1, wherein A plurality of protrusions (5) are arranged on the bottom of the groove (4).

7. The terminal post according to claim 6, characterized in that, The protrusions (5) are tooth-shaped.

8. A top cover assembly, characterized in that, It includes a top cover plate (6) and a terminal post as described in any one of claims 1-7; The top cover plate (6) is provided with a terminal post hole; The terminal post body (1) passes through the terminal post hole.

9. The top cover assembly according to claim 8, characterized in that, It further 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 plate (6); The sealing ring (8) is sleeved on the terminal post body (1), and the sealing ring (8) is clamped between the lower surface of the top cover plate (6) and the terminal post body (1); The fixing part is arranged on the upper surface of the top cover plate (6) and is sleeved on the terminal post body (1) to insulatively separate the top cover plate (6) from the terminal post body (1).

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

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