A nano-injection molded standard terminal

Abstract

The utility model discloses a kind of standard terminals of nano injection molding, comprising: welding ring, nano injection molding and pole, the inside of welding ring is equipped with mounting hole, and the inside of mounting hole is equipped with pole, welding ring and pole are connected by nano injection molding between, interlocking piece that corresponds to each other is equipped between the pole and welding ring, and interlocking piece is located in nano injection molding inside, welding ring and pole are formed double fixed by interlocking piece and nano injection molding between.The interlocking piece that corresponds to each other is introduced between the standard brick terminal welding ring and pole, and makes interlocking piece located in nano injection molding inside, realized the "double fixed" between welding ring and pole, and double fixed structure can effectively improve the tensile and torsional resistance of pole.Under the action of external stress, interlocking piece can share part of stress, thereby prolongs the service life of battery cover plate, improves the overall safety of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery component technology, and more specifically, to a standard terminal for nano-injection molding applied to batteries. Background Technology

[0002] With the increasing thinness and integration of electronic products, highly reliable electrical connection technologies have become a key focus of research and development. Nano-molding technology (NMT), as an advanced dissimilar material bonding technology, creates nanoscale pores on metal surfaces, allowing plastic to be directly injected into the metal surface. This achieves a tight bond between the metal and plastic, offering advantages such as high bonding strength, good sealing performance, and high design freedom, and is widely used in electronic connectors, structural components, and other fields.

[0003] However, existing nano-injection molding connection solutions, especially those involving the connection of conductive components such as weld rings and terminals, still have some technical shortcomings. In existing technologies, the weld ring and terminal are mainly connected through microscopic "anchor points" formed by the nano-injection molding process. While this connection provides a certain degree of bonding strength, it is often insufficient under large tensile or torsional forces, exhibiting poor tensile and torsional resistance, which can easily lead to connection failure. Furthermore, existing technologies often employ sharp-angle structures for metal components such as terminals and weld rings, which can easily lead to stress concentration during nano-injection molding. Stress concentration can not only generate microcracks at the junction of the metal and molded parts, reducing bonding strength, but also affect the flow properties of the plastic, easily causing uneven or insufficient plastic filling at the sharp corners, thus affecting the product's sealing performance, reliability, and yield. Utility Model Content

[0004] The purpose of this invention is to solve the sealing defects of existing nano-injection molded cover plates. Nano-injection only provides microscopic "anchor points" for the pole, and has certain deficiencies in tensile strength and torsion resistance. Moreover, most of the current poles and welding rings and other metal parts have sharp corners, which can easily cause stress concentration and poor plastic flow during the nano-injection process, and can easily lead to uneven filling and insufficient filling.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A standard terminal made of nano-injection molding includes: a welding ring, a nano-injection molded part, and an electrode post. The welding ring has a mounting hole inside, and the mounting hole has an electrode post inside. The welding ring and the electrode post are connected by the nano-injection molded part.

[0007] The pole and the welding ring are provided with corresponding interlocking components, and the interlocking components are located inside the nano-injection molded part. The welding ring and the pole are doubly fixed by the interlocking components and the nano-injection molded part.

[0008] Furthermore, the interlocking component includes an annular boss connected to the pole post and an annular convex ring connected to the welding ring, with the convex ring corresponding to the boss.

[0009] Furthermore, the outer ends of both sides of the vertical cross-section of the boss are semi-circular, and the boss is uniformly provided with through holes that extend upwards, with rounded corners at both the upper and lower ends of the through holes.

[0010] Furthermore, the vertical cross-section of the convex ring is "7" shaped, the convex ring includes a horizontal segment and a vertical segment, the horizontal segment and the vertical segment are integrated into one piece, the inner end of the horizontal segment is semi-circular, the back of the horizontal segment connecting the vertical segment is provided with rounded corners, and the vertical segment is arc-shaped.

[0011] Furthermore, the height of the boss is 0.5mm-0.7mm, the height of the horizontal section of the convex ring is 0.5mm-0.7mm, and the height of the pole post is 3.8mm-4.1mm.

[0012] Furthermore, the interlocking component includes an "L"-shaped boss connected to the pole post and an "L"-shaped protrusion connected to the welding ring, with the "L"-shaped boss and the "L"-shaped protrusion corresponding to each other.

[0013] Furthermore, the upper ends of the cross-sections of the "L"-shaped boss and the "L"-shaped ring are both semi-circular, and the lower ends of the "L"-shaped boss and the "L"-shaped ring are rounded.

[0014] Beneficial effects: Compared with the prior art, this application has the following advantages:

[0015] 1. This standard terminal utilizes a dual fixing mechanism of "interlocking components + nano-injection molding" by incorporating corresponding interlocking elements between the welding ring and the electrode post, which are then encased within a nano-injection molded part. This mechanical interlocking structure, combined with the molecular-level bonding force of nano-injection molding, significantly improves the tensile and torsional resistance between the welding ring and the electrode post, ensuring the reliability and stability of the terminal connection under various harsh operating conditions.

[0016] 2. The structure of this standard terminal interlock component has been optimized, with particular emphasis on rounded corners and curved transitions. These smooth transition areas effectively avoid stress concentration problems caused by traditional sharp-corner structures, improve the flowability of plastic during nano-injection molding, and allow the plastic to fill the bonding area more evenly and fully, reducing defects such as uneven filling and insufficient filling, thereby improving product yield and sealing performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the standard terminal for nano-injection molding of this utility model;

[0018] Figure 2 This is a schematic diagram of the standard terminal cross-section of the nano-injection molding of this utility model;

[0019] Figure 3 This is a schematic diagram of the pole structure;

[0020] Figure 4 This is a schematic cross-sectional view of the cover plate according to another embodiment of the present invention.

[0021] Reference numerals: 1-Welding ring, 11-Annular convex ring, 111-Horizontal segment, 112-Vertical segment, 12-“L”-shaped convex ring, 2-Nano-injection molded part, 3-Position post, 31-Annular boss, 311-Through hole, 32-“L”-shaped boss, 4-Interlocking part. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Implementation Example 1:

[0024] Reference Figure 1 , Figure 2 , Figure 3 This invention discloses a standard terminal made of nano-injection molding. The terminal includes a welding ring 1, a nano-injection molded component 2, and a terminal post 3. The welding ring 1 has an internal mounting hole, and the terminal post 3 is disposed inside the mounting hole 101. The welding ring 1 and the terminal post 3 are connected by the nano-injection molded component 2.

[0025] To enhance the connection strength and reliability between the welding ring 1 and the electrode post 3, this invention provides corresponding interlocking components 4 between the electrode post 3 and the welding ring 1. The interlocking components 4 are located inside the nano-injection molded part 2, creating a double fixation between the welding ring 1 and the electrode post 3 through the interlocking components 4 and the nano-injection molded part 2. This double fixation mechanism achieves molecular-level bonding (microscopic anchoring) between the metal and plastic through the nano-injection molded part 2, and macroscopic mechanical interlocking through the interlocking components 4, significantly improving the terminal's pull-out and torsional resistance.

[0026] In a preferred embodiment, such as Figure 2As shown, the interlocking component 4 includes an annular boss 31 connected to the pole post 3 and an annular protrusion 11 connected to the welding ring 1. The annular boss 31 and the annular protrusion 11 correspond to each other, forming a mechanical interlocking structure. The annular design of the annular boss 31 and the annular protrusion 11 ensures that the interlocking effect is evenly distributed throughout the entire mating circumference, effectively resisting multi-directional torsional forces. During injection molding, the nano-injection molded part 2 fills the gap formed by the annular boss 31 and the annular protrusion 11, tightly wrapping them and further enhancing the interlocking effect.

[0027] To optimize the nano-injection molding process and bonding performance, the outer ends of both sides of the vertical cross-section of the annular boss 31 are preferably semi-circular. Compared to a sharp-cornered design, the smooth transition of the semi-circular shape avoids stress concentration in the corresponding area of ​​the injection mold and facilitates better filling of the plastic melt during injection molding, reducing air bubbles and incomplete filling. Furthermore, the annular boss 31 can also be uniformly provided with through holes 311. These through holes 311 increase the contact area between the plastic and the metal, forming more "anchor points" and further enhancing the bonding force of the nano-injection molding. To further optimize plastic filling and demolding, the upper and lower ends of the through holes 311 are preferably rounded.

[0028] The vertical cross-section of the annular protrusion 11 is preferably "7" shaped, and is integrally designed with a horizontal segment 111 and a vertical segment 112. This "7" shaped structure forms a good fit with the annular boss 31. The inner end of the horizontal segment 111 is preferably semi-circular, echoing the semi-circular design of the annular boss 31, together achieving a smooth transition and optimizing the injection molding process. The back where the horizontal segment 111 connects to the vertical segment 112 is preferably provided with rounded corners, which is also to avoid stress concentration and improve plastic flow. The vertical segment 112 is preferably arc-shaped. The arc design not only facilitates uniform filling of plastic, but also provides better pressure resistance and deformation resistance in terms of structure.

[0029] To achieve optimal bonding strength and reliability, while also considering manufacturing processes, the height of the annular boss 31 is preferably 0.5mm-0.7mm. The height of the transverse segment 111 of the annular protrusion 11 is preferably 0.5mm-0.7mm. The height of the pole post 3 is preferably 3.8mm-4.1mm. These dimensional parameters have been repeatedly tested and verified, ensuring both mechanical performance requirements and the operability and stability of the nano-injection molding process.

[0030] Example 2:

[0031] Reference Figure 1 , Figure 4This invention discloses another standard terminal made of nano-injection molding. This terminal also includes a welding ring 1, a nano-injection molded part 2, and a terminal post 3. The welding ring 1 has a mounting hole 101 inside, and the terminal post 3 is disposed inside the mounting hole 101. The welding ring 1 and the terminal post 3 are connected by the nano-injection molded part 2. Interlocking parts 4 are provided between the terminal post 3 and the welding ring 1, and the interlocking parts 4 are located inside the nano-injection molded part 2. The welding ring 1 and the terminal post 3 are doubly fixed by the interlocking parts 4 and the nano-injection molded part 2.

[0032] In this embodiment, the interlocking component 4 includes an "L"-shaped boss 32 connected to the pole post 3 and an "L"-shaped protruding ring 12 connected to the welding ring 1. The "L"-shaped boss 32 and the "L"-shaped protruding ring 12 correspond to each other to form a mechanical interlocking structure. This "L"-shaped interlocking component design can provide stronger mechanical limiting effect in a specific direction according to actual application requirements, or is easier to implement in certain specific structures, such as on non-perfectly annular joint surfaces. The nano-injection molded part 2 tightly wraps these "L"-shaped bosses 32 and "L"-shaped protruding rings 12, playing a dual fixing role.

[0033] To further optimize the nano-injection molding process and the quality of the bonding interface, the upper ends of the cross-sections of the "L"-shaped boss 32 and the "L"-shaped ring 12, i.e., the main surface edges in contact with the nano-injection molded part 2, are preferably semi-circular. The semi-circular design effectively avoids stress concentration and guides the uniform flow of the molten plastic during injection molding, reducing dead corners and burrs. Furthermore, the lower ends of the "L"-shaped boss 32 and the "L"-shaped ring 12, i.e., the transition area connecting with the main metal body, are preferably provided with rounded corners. The rounded corner design also helps to disperse stress, avoiding excessive tensile stress concentration at the sharp corners of the metal parts during cooling and shrinkage of the injection molded part, thereby improving the durability and stability of the bonding interface.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A standard terminal for nano-injection molding, characterized in that, include: The welding ring (1), the nano-injection molded part (2) and the pole (3) are provided. The welding ring (1) has an installation hole inside, and the pole (3) is provided inside the installation hole (101). The welding ring (1) and the pole are connected by the nano-injection molded part (2). The pole post (3) and the welding ring (1) are provided with corresponding interlocking parts (4), and the interlocking parts (4) are located inside the nano-injection molded part (2). The welding ring (1) and the pole post (3) are double fixed by the interlocking parts (4) and the nano-injection molded part (2).

2. The standard terminal for nano-injection molding according to claim 1, characterized in that: The interlocking component (4) includes an annular boss (31) connected to the pole post (3) and an annular protrusion (11) connected to the welding ring (1), and the protrusion (11) corresponds to the boss (31).

3. The standard terminal for nano-injection molding according to claim 2, characterized in that: The two outer ends of the vertical cross-section of the boss (31) are semi-circular. The boss (31) is uniformly provided with through holes (311) that pass through it. The upper and lower ends of the through holes (311) are rounded.

4. The standard terminal for nano-injection molding according to claim 2, characterized in that: The vertical cross-section of the convex ring (11) is "7" shaped. The convex ring (11) includes a horizontal segment (111) and a vertical segment (112). The horizontal segment (111) and the vertical segment (112) are integrated. The inner end of the horizontal segment (111) is semi-circular. The back of the horizontal segment (111) and the vertical segment (112) are connected by rounded corners. The vertical segment (112) is arc-shaped.

5. The standard terminal for nano-injection molding according to claim 2, characterized in that: The height of the boss (31) is 0.5mm-0.7mm, the height of the horizontal section of the convex ring (11) is 0.5mm-0.7mm, and the height of the pole post (3) is 3.8mm-4.1mm.

6. The standard terminal for nano-injection molding according to claim 1, characterized in that: The interlocking component (4) includes an "L"-shaped boss (32) connected to the pole post (3) and an "L"-shaped protrusion (12) connected to the welding ring (1), and the "L"-shaped boss (32) corresponds to the "L"-shaped protrusion (12).

7. The standard terminal for nano-injection molding according to claim 6, characterized in that: The upper ends of the cross-sections of the "L"-shaped boss (32) and the "L"-shaped ring (12) are semi-circular, and the lower ends of the "L"-shaped boss (32) and the "L"-shaped ring (12) are rounded.

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