Battery round cover assembly

Abstract

The utility model provides a kind of battery round cover assembly.The battery round cover assembly, including top cover, lower plastic and pole, above-mentioned lower plastic is connected in top cover lower part, the pole is connected in lower plastic and top cover, still including upper plastic and connecting piece;The pole lower end has protruding base, above-mentioned base buckle connection is in lower plastic outside and lower plastic is tightly pressed between base and top cover;The connecting piece is connected at base lower end and connecting piece covers lower plastic;There is filled gap between the top cover and the pole outside, above-mentioned upper plastic fills and is connected at above-mentioned filled gap.The battery round cover assembly is high in stability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to a battery cover assembly. Background Technology

[0002] The cover of existing cylindrical batteries usually requires injection molding to ensure the overcurrent and thrust performance of the cells.

[0003] During the injection molding process, the injection mold applies pressure to the upper surface of the cover plate, and then injection molding is performed between the post and the cover plate. However, since injection molding is generally the last step in cover plate production, the lower plastic has already been assembled with the cover plate at this point. When subjected to the pressure of the injection mold, the lower plastic is at risk of cracking.

[0004] Moreover, once a crack occurs, the electrode cannot be disassembled without damage because the cover plate and the electrode post are connected by injection molding. This will cause the entire cover plate to be scrapped, which will lead to an increase in the defect rate and production costs.

[0005] Furthermore, the current plastic part is relatively small, and when welding the connecting piece to the bottom of the electrode post, it cannot provide sufficient support, causing the connecting piece to shrink excessively during the welding process, resulting in flatness deviations. Once the flatness deviations are excessive, it will affect the welding yield of the connecting piece and the circumferential welding of the battery cell, such as causing problems like incomplete welding, missing welding, and weld seams. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a round cover assembly in a battery cover that can effectively prevent plastic breakage and cracking during the manufacturing process.

[0007] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0008] A battery round cover assembly includes a top cover, a lower plastic part, and a terminal post, wherein the lower plastic part is connected to the lower part of the top cover, and the terminal post is inserted and connected to the lower plastic part and the top cover, characterized in that it further includes an upper plastic part and a connecting piece.

[0009] The lower end of the pole post has a protruding base, which is fastened to the outside of the lower plastic and the lower plastic is pressed tightly between the base and the top cover.

[0010] The connecting piece is connected to the lower end of the base and the connecting piece covers the lower plastic;

[0011] There is a filling gap between the top cover and the outer side of the pole post, and the above-mentioned upper plastic filler is connected to the filling gap.

[0012] In the aforementioned battery cover assembly, the inner side of the top cover has a positioning structure that can be circumferentially fixed with the upper plastic.

[0013] In the aforementioned battery cover assembly, the outer side of the electrode post has a positioning structure II that can form a circumferentially fixed shape with the upper plastic.

[0014] In the aforementioned battery cover assembly, the top cover is disc-shaped and has a through hole at its center.

[0015] In the aforementioned battery cover assembly, the positioning structure includes a stepped seat that is recessed in a stepped shape at the upper port of the top cover through hole.

[0016] In the aforementioned battery cover assembly, the positioning structure one further includes an annular recessed step seat two at the inner port of the step seat one.

[0017] In the aforementioned battery cover assembly, the stepped seat has several circumferentially distributed recessed positioning grooves.

[0018] In the aforementioned battery cover assembly, the second positioning structure includes an annular recessed receiving groove in the center of the electrode post, and the bottom of the receiving groove has several strip-shaped and vertically protruding limiting strips, with a secondary positioning groove formed between two adjacent limiting strips.

[0019] In the aforementioned battery cover assembly, the lower plastic has several through-holes for weight reduction along its circumference.

[0020] In the aforementioned battery cover assembly, the connecting piece is disc-shaped and has a through hole 2 at its center. The lower part of the base has a connecting part that matches the through hole 2 and the connecting part is embedded in the through hole 2. The outer edge of the connecting piece has an upwardly folded fastening edge. The fastening edge and the upper part of the connecting piece form a reinforcing cavity. The lower plastic part matches the reinforcing cavity and is tightly connected to the reinforcing cavity.

[0021] Compared with existing technologies, the battery cover assembly indirectly increases the thickness of the lower plastic due to the setting of the connecting piece, thereby effectively reducing the risk of the lower plastic cracking during the injection molding process of the upper plastic in the entire battery cover assembly.

[0022] Meanwhile, since the plastic is effectively protected during the manufacturing process, the connecting piece can receive stable support from the undeformed plastic during the welding process between the connecting piece and the pole post, which indirectly improves the welding stability of the connecting piece. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the battery cover assembly.

[0024] Figure 2 This is a cross-sectional view of the battery cover assembly.

[0025] Figure 3 This is a three-dimensional structural diagram of the top cover viewed from above.

[0026] Figure 4 This is a three-dimensional structural diagram showing the shape and angle of the top cover.

[0027] Figure 5 This is an exploded view of the battery cover assembly.

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the pole.

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the plastic.

[0030] In the picture:

[0031] 1. Top cover; 11. Through hole one; 111. Step seat one; 112. Step seat two; 113. Positioning groove; 2. Lower plastic; 21. Weight reduction hole; 3. Pole post; 31. Base; 311. Connecting part; 32. Receiving groove; 33. Limiting strip; 4. Upper plastic; 5. Connecting piece; 51. Through hole two; 52. Fastening edge; 6. Sealing ring; 7. Fastening part one; 8. Fastening part two. Detailed Implementation

[0032] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0033] like Figure 1-7 As shown, this battery round cover assembly includes a top cover 1, a lower plastic 2 and an electrode post 3. The lower plastic 2 is connected to the lower part of the top cover 1, and the electrode post 3 is connected to the lower plastic 2 and the top cover 1. It also includes an upper plastic 4 and a connecting piece 5.

[0034] The lower end of the pole post 3 has a protruding base 31, which is fastened to the outside of the lower plastic 2 and the lower plastic 2 is pressed tightly between the base 31 and the top cover 1.

[0035] The connecting piece 5 is connected to the lower end of the base 31 and the connecting piece 5 covers the lower plastic 2;

[0036] There is a filling gap between the top cover 1 and the outer side of the pole post 3, and the upper plastic 4 is filled and connected to the filling gap.

[0037] The inner side of the top cover 1 has a positioning structure that can form a circumferential fixation with the upper plastic 4.

[0038] The outer side of the pole post 3 has a positioning structure 2 that can form a circumferential fixation with the upper plastic 4.

[0039] The pole post 3 is connected through the top cover 1 and the lower plastic 2. The base 31 at the lower end of the pole post 3 abuts against the lower plastic 2, causing the lower plastic 2 to be tightly squeezed between the base 31 and the top cover 1, thus forming a semi-finished product.

[0040] In the above semi-finished product, there is a gap between the pole post 3 and the top cover 1, and the upper plastic 4 is formed at the gap by injection molding process.

[0041] Given that the top cover 1 has a positioning structure one inside and the pole post 3 has a positioning structure two outside.

[0042] The outer side of the upper plastic 4 is connected to positioning structure one, and the inner side is connected to positioning structure two. Thus, the outer side of the upper plastic 4 is stably circumferentially fixed to the top cover 1 under the action of positioning structure one, and the inner side is stably circumferentially fixed to the pole post 3 under the action of positioning structure two.

[0043] Finally, ensure a stable connection between the top cover 1 and the pole post 3.

[0044] While connecting the lower part of the base 31, the connecting piece 5 also covers the lower part of the lower plastic 2, thus indirectly increasing the thickness of the lower plastic 2 and ensuring that it has sufficient strength so that the lower plastic 2 will not crack during the manufacturing process.

[0045] The top cover 1 is disc-shaped and has a through hole 11 in its center.

[0046] The positioning structure includes a stepped seat 111 that is recessed in a stepped shape at the upper end of the through hole 11 of the top cover 1.

[0047] The positioning structure one also includes an annular recessed step seat two 112 at the inner port of the step seat one 111.

[0048] The step seat 111 has several circumferentially distributed recessed positioning grooves 113.

[0049] After the outer side of the upper plastic 4 is embedded in the step seat 111, the step seat 2 112 and the positioning groove 113, the top cover 1 and the outer side of the upper plastic 4 can be stably connected together and form a circumferential fixation.

[0050] The second positioning structure includes an annular recessed receiving groove 32 in the middle of the pole post 3. The bottom of the receiving groove 32 has several strip-shaped and vertically protruding limiting strips 33, and a secondary positioning groove is formed between two adjacent limiting strips 33.

[0051] The receiving groove 32 allows more of the outer side of the upper plastic after injection molding to penetrate the electrode post 3, increasing the connection area between the upper plastic 4 and the electrode post 3.

[0052] Meanwhile, the secondary positioning groove formed by several limiting strips 33 can not only further increase the connection area, but also make the pole post 3 stably circumferentially fixed after it is connected to the upper plastic 4.

[0053] The lower plastic 2 has several through-holes 21 along its circumference to reduce weight.

[0054] The weight reduction hole 21 has two functions:

[0055] Firstly, it effectively reduces the weight of the lower plastic section;

[0056] Secondly, appropriately reduce the material consumption of lower plastic 2 to lower costs.

[0057] The connecting piece 5 is disc-shaped and has a through hole 51 in its center. The lower part of the base 31 has a connecting part 311 that matches the through hole 51 and the connecting part 311 is embedded in the through hole 51. The outer edge of the connecting piece 5 has an upwardly folded fastening edge 52. The fastening edge 52 and the upper part of the connecting piece 5 form a reinforcing cavity. The lower part of the lower plastic 2 matches the reinforcing cavity and is tightly connected to the reinforcing cavity.

[0058] After the connecting part 311 at the lower part of the base 31 is embedded in the through hole 51, the base 31 and the connecting piece 5 can be stably connected because they match. Since the connecting piece 5 abuts against the lower plastic 2 and forms surface contact, and the connecting piece 5 covers the lower part of the lower plastic 2, the lower plastic 2 can be guaranteed to have sufficient strength during the manufacturing process, and the lower plastic 2 is not easy to crack or be damaged during the manufacturing process.

[0059] The connection piece in this battery cover assembly indirectly increases the thickness of the lower plastic, thereby effectively reducing the risk of the upper plastic cracking in the lower plastic during the injection molding process.

[0060] Meanwhile, since the plastic is effectively protected during the manufacturing process, the connecting piece can receive stable support from the undeformed plastic during the welding process between the connecting piece and the pole post, which indirectly improves the welding stability of the connecting piece.

[0061] In this embodiment, a sealing ring 6 is fitted onto the pole post 3, with the lower part of the sealing ring 6 abutting against the upper part of the base 31. The connection between the upper plastic 4 and the top cover 1 is located above the sealing ring 6. The sealing ring 6 ensures a good seal at the connection.

[0062] Meanwhile, the top cover 1 has an annular protruding fastening part 7 at the lower end of the through hole 11, and the lower plastic 2 has a fastening part 8 that matches the fastening part 7. After the fastening part 7 and the fastening part 8 are fastened together, the top cover 1 and the lower plastic 2 can be stably connected.

[0063] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0064] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A battery round cover assembly, comprising a top cover, a lower plastic part, and a terminal post, wherein the lower plastic part is connected to the lower part of the top cover, and the terminal post is inserted and connected to the lower plastic part and the top cover, characterized in that, It also includes the top plastic and connecting pieces; The lower end of the pole post has a protruding base, which is fastened to the outside of the lower plastic and the lower plastic is pressed tightly between the base and the top cover. The connecting piece is connected to the lower end of the base and the connecting piece covers the lower plastic; There is a filling gap between the top cover and the outer side of the pole post, and the above-mentioned upper plastic filler is connected to the filling gap.

2. The battery cover assembly according to claim 1, characterized in that, The inner side of the top cover has a positioning structure that can be circumferentially fixed with the upper plastic.

3. The battery round cover assembly according to claim 1, characterized in that, The outer side of the pole post has a positioning structure two that can form a circumferential fixation with the upper plastic.

4. The battery cover assembly according to claim 1, 2, or 3, characterized in that, The top cover is disc-shaped and has a through hole in its center.

5. The battery cover assembly according to claim 4, characterized in that, The positioning structure includes a stepped seat that is recessed in a stepped shape at the upper end of the top cover through hole.

6. The battery cover assembly according to claim 5, characterized in that, The positioning structure one also includes an annular recessed step seat two at the inner port of the step seat one.

7. The battery cover assembly according to claim 6, characterized in that, The step seat has several circumferentially recessed positioning grooves.

8. The battery cover assembly according to claim 3, characterized in that, The second positioning structure includes an annular recessed receiving groove in the middle of the pole post, and several strip-shaped and vertically protruding limiting strips at the bottom of the receiving groove, forming a secondary positioning groove between two adjacent limiting strips.

9. The battery cover assembly according to claim 1, characterized in that, The lower plastic has several through-holes for weight reduction along its circumference.

10. The battery cover assembly according to claim 1, characterized in that, The connecting piece is disc-shaped and has a through hole 2 in its center. The lower part of the base has a connecting part that matches the through hole 2 and the connecting part is embedded in the through hole 2. The outer edge of the connecting piece has an upwardly folded fastening edge. The fastening edge and the upper part of the connecting piece form a reinforcing cavity. The lower plastic part matches the reinforcing cavity and is tightly connected to the reinforcing cavity.

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