A structure for fitting a battery terminal to a center cover

Abstract

The utility model provides a kind of cooperation structure of battery terminal and middle cover, including middle cover, terminal slot is equipped on middle cover, the bottom of terminal slot is equipped with pole hole, terminal is equipped in cooperation in the terminal slot, the sidewall of the bottom of terminal slot is equipped with a circle downwardly inclined flow guide slope, glue injection port is also equipped on the sidewall of terminal slot, the sidewall of glue injection port is outwardly recessed to form, and the sidewall of glue injection port is inclined downward and is connected with flow guide slope.The utility model is innovatively designed by flow guide slope and glue injection port, which is conducive to the natural flow of glue solution, making the glue injection process smoother;Form annular sealing channel to ensure uniform distribution of sealant;Prevent glue solution from accumulating in local area, ensure complete filling of glue solution, avoid air bubbles and lack of glue problem, make the appearance of color glue more beautiful, enhance the sealing performance of terminal, prevent terminal from climbing acid corrosion.

Description

Technical Field

[0001] This utility model belongs to the field of storage battery technology, specifically relating to a matching structure between storage battery terminals and a middle cover. Background Technology

[0002] Currently, battery production is automated. After the terminals are soldered, sealant needs to be applied to the terminal slots. Positive and negative terminals are typically distinguished: the positive terminal is red or brown, and the negative terminal is blue or black. To prevent misalignment during soldering, terminal holders are installed in the terminal slots. The gap between the copper base of the terminal and the bottom of the slot is very small. Currently, when applying colored sealant, it is aligned with the soldering point. Due to the short slot structure, the flow of the colored sealant is hindered. Air bubbles formed in the corners and crevices cannot be expelled in time, resulting in bubbles on the sealant surface affecting the appearance. Simultaneously, the trapped air bubbles impair the sealant's protective sealing of the terminals and posts. During battery charging and discharging, acid inside the battery migrates to the terminals and posts along with electrons, a phenomenon known as "terminal acid creep," causing terminal corrosion and even burnout.

[0003] Utility model CN209487547U discloses a battery terminal sealing structure, including a battery cover, a lead sleeve, terminals, and battery terminals. The battery cover has a groove with a first through hole at its bottom. The lead sleeve is embedded in the first through hole, with its top protruding above it, forming a first layer of seal. The lead sleeve has a second through hole, through which one end of the terminal passes and protrudes above the upper surface of the lead sleeve. The battery terminal is installed in the groove and contacts the upper part of the lead sleeve. The terminal, lead sleeve, and battery terminal are fused together using a welding torch, forming a second layer of seal. Sealant is injected into other gaps within the groove to form a third layer of seal. However, this multi-layer sealing structure is complex and cumbersome to operate. Utility Model Content

[0004] To address the aforementioned technical problems in the existing technology, this utility model provides a mating structure between the battery terminal and the middle cover, which can solve the safety problems of air bubbles affecting the sealing performance and causing terminal corrosion after adding sealant to the terminal groove.

[0005] This utility model provides a mating structure for a battery terminal and a middle cover, including a middle cover, a terminal groove on the middle cover, a terminal post hole at the bottom of the terminal groove, a terminal being fitted inside the terminal groove, a downward-sloping guide slope on the bottom side wall of the terminal groove, and an injection port on the side wall of the terminal groove, the injection port being formed by the outward indentation of the side wall of the terminal groove, and the side wall of the injection port being inclined downward and connected to the guide slope.

[0006] Furthermore, the inclination angle of the sidewall of the injection port is consistent with the inclination angle of the guide slope, so that the injection port and the guide slope form a smooth transition flow channel, which can improve the smoothness of the injection process, avoid the generation of turbulence or air bubbles in the adhesive, and ensure that the sealant can quickly and evenly fill the entire annular sealing groove, thereby forming a more complete and defect-free sealing layer, improving the reliability and consistency of the seal.

[0007] Furthermore, the top surface of the dispensing port is semi-circular or semi-elliptical, which can guide the dispensing nozzle to be aligned and inserted more smoothly, reduce resistance and glue splashing at the beginning of dispensing, and ensure that the glue flows smoothly into the guide slope along the predetermined path from the beginning, effectively avoiding air bubbles and glue shortage problems caused by poor alignment or initial turbulence.

[0008] Furthermore, the height of the guide slope is 1-3 mm. This height range ensures that a sealing ring of sufficient volume is formed to provide a reliable seal, while avoiding excessive adhesive that could lead to waste or overflow and contamination of the terminals, achieving an optimal balance between ensuring sealing performance and controlling production costs.

[0009] Furthermore, the inclination angle of the guide slope is 30-60°. An angle that is too small will cause the adhesive to stagnate and fail to fill the sealing groove; an angle that is too large will cause the adhesive to flow too quickly, easily generating air bubbles. A 30-60° angle ensures that the adhesive smoothly and evenly spreads across the slope, forming a dense, defect-free sealing layer.

[0010] Furthermore, the injection port is located at one end of the terminal groove near the edge of the middle cover along its length, which can maximize the use of the natural flow of the adhesive during the filling process, more effectively expel air from the cavity, and avoid sealing defects such as air bubbles or insufficient adhesive at the far end, thereby ensuring the formation of a complete and dense sealing ring.

[0011] Furthermore, the terminal includes a terminal post passing through the terminal post hole, a terminal post with a threaded wiring hole on the top surface, and a connecting piece connecting the terminal post and the terminal post.

[0012] Furthermore, the top outer periphery of the terminal post is provided with a groove, which cooperates with the mechanical gripper during automated production.

[0013] Furthermore, the clearance between the connecting piece and the bottom surface of the terminal slot is 1-3mm. The smaller the clearance, the less likely the adhesive is to flow to the bottom of the terminal, and the more likely air bubbles will appear.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the innovative design of the guide slope and the injection port, facilitates the natural flow of the adhesive, making the injection process smoother; it forms an annular sealing channel to ensure uniform distribution of the sealant; it prevents the adhesive from accumulating in local areas, ensuring complete filling of the adhesive, avoiding air bubbles and missing adhesive, making the colored adhesive more aesthetically pleasing, enhancing the sealing performance of the terminals, and preventing acid creep corrosion of the terminals. Attached Figure Description

[0015] Figure 1 This is a top view schematic diagram of the mating structure between the battery terminals and the middle cover.

[0016] Figure 2 This is a cross-sectional view of the mating structure between the battery terminals and the middle cover.

[0017] Figure 3 This is a schematic diagram of the glue injection process for the mating structure between the battery terminals and the middle cover.

[0018] Figure label: 1. Middle cover, 2. Terminal groove, 21. Flow guide slope, 22. Glue injection port, 3. Terminal, 31. Terminal post, 32. Connecting piece, 33. Groove. Detailed Implementation

[0019] like Figures 1-3 As shown, a battery terminal and middle cover mating structure includes a middle cover 1, a terminal groove 2 on the middle cover 1, a terminal post hole at the bottom of the terminal groove 2, and a terminal 3 mating inside the terminal groove 2.

[0020] Terminal 3 includes a terminal post 31 that passes through the terminal post hole, a terminal post 32 with a threaded wiring hole on the top surface, and a connecting piece 33 that connects the terminal post 31 and the terminal post 32.

[0021] The top outer periphery of the terminal post 32 is provided with a groove 34, which cooperates with the mechanical gripper during automatic production.

[0022] The clearance between the connecting piece 33 and the bottom surface of the terminal slot 2 is 1-3mm. The smaller the clearance, the less likely the glue will flow to the bottom of the terminal 3, and the more likely air bubbles will appear.

[0023] The bottom sidewall of the terminal slot 2 is provided with a downward-sloping guide slope 21. The height of the guide slope 21 is 1-3mm. This height range ensures that a sealing ring of sufficient volume is formed to provide a reliable seal, while avoiding excessive glue that would be wasteful or overflow and contaminate the terminal 3, thus achieving the best balance between ensuring sealing performance and controlling production costs.

[0024] The inclination angle of the guide slope 21 is 30-60°. If the angle is too small, the adhesive will stagnate and fail to fill the sealing groove; if the angle is too large, the adhesive will flow too fast and easily generate air bubbles. 30-60° ensures that the adhesive is spread evenly and smoothly across the slope, forming a dense and defect-free sealing layer.

[0025] The side wall of the terminal slot 2 is also provided with a glue injection port 22. The glue injection port 22 is formed by the side wall of the terminal slot 2 being recessed outward, and the side wall of the glue injection port 22 is inclined downward and connected to the guide slope 21.

[0026] The side wall inclination angle of the injection port 22 is consistent with the inclination angle of the guide slope 21, so that the injection port 22 and the guide slope 21 form a smooth transition flow channel, which can improve the smoothness of the injection process, avoid the generation of turbulence or air bubbles in the glue, and ensure that the sealant can quickly and evenly fill the entire annular sealing groove, thereby forming a more complete and defect-free sealing layer, improving the reliability and consistency of the seal.

[0027] The top surface of the dispensing nozzle 22 is semi-circular or semi-elliptical, which can guide the dispensing nozzle to be aligned and inserted more smoothly, reduce resistance and glue splashing at the beginning of dispensing, and ensure that the glue flows smoothly into the guide slope 21 along the predetermined path from the beginning, effectively avoiding air bubbles and glue shortage problems caused by poor alignment or initial turbulence.

[0028] The injection port 22 is located at one end of the terminal groove 2 along the length direction of the middle cover 1. It can maximize the use of the natural flow of the glue during the filling process, more effectively expel the air in the cavity, and avoid sealing defects such as air bubbles or insufficient glue at the far end, thereby ensuring the formation of a complete and dense sealing ring.

[0029] Glue injection process: Move the automatic glue injection needle to the glue injection port 22 to inject glue. The glue flows along the inclined side wall into the gap at the bottom of the terminal 3, removes excess air, and gradually fills the gap with glue.

[0030] Table 1 Using the above-mentioned battery terminal and middle cover mating structure and glue injection method, the time of terminal acid creep in four different embodiments with different suspension heights between the connecting piece and the bottom surface of the terminal groove is shown in Table 1. It can be seen that when the suspension height between the connecting piece and the bottom surface of the terminal groove is 1-3mm, it is difficult to generate air bubbles, and the sealing effect is better.

Claims

1. A mating structure between a battery terminal and a middle cover, comprising a middle cover, a terminal groove provided on the middle cover, a terminal post hole provided at the bottom of the terminal groove, and a terminal being fitted inside the terminal groove, characterized in that, The bottom sidewall of the terminal slot is provided with a downward-sloping flow guide slope. The sidewall of the terminal slot is also provided with an injection port. The injection port is formed by the outward indentation of the sidewall of the terminal slot, and the sidewall of the injection port is inclined downward and connected to the flow guide slope.

2. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The inclination angle of the sidewall of the injection port is consistent with the inclination angle of the guide slope.

3. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The top surface of the injection port is semi-circular or semi-elliptical.

4. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The height of the guide slope is 1-3mm.

5. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The inclination angle of the guide slope is 30-60°.

6. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The glue injection port is located at one end of the terminal slot along its length, near the edge of the middle cover.

7. The mating structure between the battery terminals and the middle cover according to claim 1, characterized in that, The terminal includes a terminal post passing through the terminal post hole, a terminal post with a threaded wiring hole on the top surface, and a connecting piece connecting the terminal post and the terminal post.

8. The mating structure between the battery terminals and the middle cover according to claim 7, characterized in that, The top outer periphery of the terminal post is provided with a groove.

9. The mating structure between the battery terminals and the middle cover according to claim 7, characterized in that, The clearance between the connecting piece and the bottom surface of the terminal slot is 1-3mm.

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