Battery cover plate with high impact resistance and stability

Abstract

The utility model provides a kind of high stability battery cover of impact resistance belongs to mechanical technical field.The high stability battery cover of impact resistance of the present application comprises top cover sheet and pole, further comprises connecting hole, connecting seat, fixed cylinder and welding ring, the connecting hole is through top cover sheet, the fixed cylinder is fixedly connected in top cover sheet upper portion and fixed cylinder is communicated with connecting hole, the inner diameter size of the fixed cylinder is greater than the inner diameter size of connecting hole and both coaxial center lines are arranged, recessed connecting seat is further provided on the top cover sheet, the outside of the connecting seat is flush with the inside of fixed cylinder, the inside of the connecting seat is located at the side wall of connecting hole, the pole is arranged in connecting hole, the welding ring is fixedly connected in fixed cylinder and the pole is positioned between welding ring and connecting seat, the outside of the welding ring has connecting part, and the contact area between the welding ring and the inner wall of fixed cylinder can be increased by connecting part.The high stability battery cover of impact resistance of the present application has high stability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a battery cover with high impact resistance and stability. Background Technology

[0002] The existing battery cover structure does not adequately constrain the radial orientation of the terminals. It relies solely on the cover itself and the lower plastic to constrain the radial orientation of the terminals. However, the terminals themselves are thin and can only cover a small portion of the terminals. Furthermore, the upper plastic is directly injection molded to the terminals, so any impact will directly affect the terminals themselves.

[0003] Furthermore, the lower strength of the plastic sheet is insufficient to withstand impacts. Upon impact, it is prone to wobbling, which can lead to short circuits.

[0004] Therefore, people have tried to improve the above technical solution. In order to enhance the radial constraint, a riveted skirt was added to the cover plate. However, the riveted skirt is difficult to process during production. It requires the pole to be semi-fixed to the cover plate and then processed by riveting equipment. During the processing, the distance between the skirt and the pole is close, which can easily damage the pole. Or, due to the bending of the cover plate under force, the processed cover plate does not meet the assembly conditions, which affects the production efficiency and yield.

[0005] Chinese patent publication number CN118589114A discloses a battery top cover and its manufacturing method. The battery top cover includes a cover plate and terminals disposed on the cover plate. The cover plate has a first mounting hole, and the terminals are installed in the first mounting hole. It also includes a sealing ring, an upper plastic layer, and a welding ring. The sealing ring, terminals, upper plastic layer, and welding ring are sequentially installed on the outer side of the cover plate. The welding ring is fixedly connected to the cover plate to fix the upper plastic layer to the cover plate. The upper plastic layer is used to limit the position of the terminals on the cover plate. The terminals press the sealing ring tightly against the cover plate, and the sealing ring seals the gap between the terminals and the first mounting hole. This invention, by pressing the sealing ring tightly against the cover plate with the terminals, makes the installation of the terminals on the cover plate more stable. Furthermore, the compressed sealing ring provides a better sealing effect between the terminals and the cover plate, thereby enhancing the sealing performance of the battery top cover, improving the safety performance of the power battery, and ensuring the service life of the power battery.

[0006] However, in the aforementioned patent, the welding ring is directly fixed to the upper end of the cover plate fixing cylinder. This connection method results in a small contact area between the welding ring and the fixing cylinder, leading to poor connection stability and making the welding ring prone to detachment under external force. Furthermore, the welding ring cannot be pre-positioned on the pole post during assembly, thus requiring excessively high assembly precision. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a battery cover with good impact resistance and high stability.

[0008] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0009] A battery cover with high impact resistance and stability includes a top cover plate and a terminal post. It is characterized by further including a connecting hole, a connecting seat, a fixing cylinder, and a welding ring. The connecting hole penetrates the top cover plate. The fixing cylinder is fixedly connected to the upper part of the top cover plate and communicates with the connecting hole. The inner diameter of the fixing cylinder is larger than the inner diameter of the connecting hole, and the two are coaxially aligned. The top cover plate also has a recessed connecting seat. The outer side of the connecting seat is flush with the inner side of the fixing cylinder, and the inner side of the connecting seat is located at the sidewall of the connecting hole. The terminal post passes through the connecting hole. The welding ring is fixedly connected inside the fixing cylinder, and the terminal post is positioned between the welding ring and the connecting seat. The outer side of the welding ring has a connecting portion, which increases the contact area between the welding ring and the inner wall of the fixing cylinder.

[0010] In the aforementioned impact-resistant and highly stable battery cover, the inner side of the welding ring has protruding bumps.

[0011] In the aforementioned impact-resistant and highly stable battery cover, there are several protrusions, which are evenly distributed circumferentially on the inner side of the welding ring.

[0012] In the aforementioned impact-resistant and highly stable battery cover, the welding ring and the protrusion are an integral structure.

[0013] In the aforementioned impact-resistant and highly stable battery cover, the dimension between the connecting seat and the lower part of the top cover is smaller than the thickness of the top cover.

[0014] In the aforementioned impact-resistant and highly stable battery cover, the fixing cylinder is arranged perpendicularly to the top cover plate.

[0015] In the aforementioned impact-resistant and highly stable battery cover, the connecting part is annular and located below the welding ring, with the outer side of the connecting part flush with the outer side of the welding ring.

[0016] In the aforementioned impact-resistant and highly stable battery cover, the connecting part and the welding ring are an integral structure.

[0017] In the aforementioned impact-resistant and highly stable battery cover, the height of the fixing cylinder is 1.5 to 3 times the thickness of the top cover sheet.

[0018] In the aforementioned impact-resistant and highly stable battery cover, the thickness of the fixing cylinder is 0.3 to 0.7 times the thickness of the top cover plate.

[0019] Compared with existing technologies, this impact-resistant and highly stable battery cover plate achieves initial positioning of the terminal post at the connecting seat inside the fixed cylinder during assembly. The protrusion on the welding ring abuts against the outside of the terminal post, ultimately ensuring that the terminal post is stably and accurately positioned inside the fixed cylinder.

[0020] Because the fixed cylinder and the top cover plate are an integral structure, and the welded ring is connected inside the fixed cylinder, this structure replaces the existing technology of riveting the skirt at the end of the fixed cylinder. That is, in the existing technology, the force at the fixed cylinder is transferred to the top cover plate when riveting the skirt, causing the top cover plate to deform.

[0021] Conversely, because this structure eliminates the need for riveting the skirt on the fixed cylinder, the battery cover is not only compact but also does not damage the top cover during assembly, making it highly practical. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the impact-resistant and highly stable battery cover.

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the impact-resistant and highly stable battery cover after the plastic coating has been removed.

[0024] Figure 3 This is a schematic diagram of the exploded structure of the impact-resistant and highly stable battery cover.

[0025] Figure 4 This is a three-dimensional structural diagram of the welding ring.

[0026] Figure 5 This is a cross-sectional structural diagram of the impact-resistant and highly stable battery cover.

[0027] Figure 6 yes Figure 4 A schematic diagram of the partial structure at part A in the middle.

[0028] In the picture:

[0029] 1. Top cover plate; 1a. Connecting hole; 1b. Connecting seat; 2. Pole post; 3. Fixing cylinder; 4. Welding ring; 4a. Connecting part; 4b. Protrusion; 5. Top plastic. Detailed Implementation

[0030] 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.

[0031] like Figure 1-5As shown, this impact-resistant and highly stable battery cover includes a top cover plate 1 and a terminal post 2, as well as a connecting hole 1a, a connecting seat 1b, a fixing cylinder 3, and a welding ring 4. The connecting hole 1a penetrates the top cover plate 1, and the fixing cylinder 3 is fixedly connected to the upper part of the top cover plate 1 and communicates with the connecting hole 1a. The inner diameter of the fixing cylinder 3 is larger than the inner diameter of the connecting hole 1a, and the two are coaxially aligned. The top cover plate 1 also has a recessed connecting seat 1b, the outer side of which is flush with the inner side of the fixing cylinder 3, and the inner side of which is located at the side wall of the connecting hole 1a. The terminal post 2 passes through the connecting hole 1a, and the welding ring 4 is fixedly connected inside the fixing cylinder 3, with the terminal post 2 positioned between the welding ring 4 and the connecting seat 1b. The outer side of the welding ring 4 has a connecting portion 4b, which increases the contact area between the welding ring 4 and the inner wall of the fixing cylinder 3.

[0032] The connecting seat 1b, the fixing cylinder 3, and the connecting hole 1a are arranged on the same axis. This structure allows the pole 2 located at the connecting hole 1a to be stably positioned at the connecting seat 1b of the fixing cylinder 3.

[0033] The welding ring 4 is connected inside the fixed cylinder 3, which avoids the welding ring 4 being excessively exposed. Moreover, the connection stability between the welding ring 4 and the fixed cylinder 3 can be effectively guaranteed by the connecting part 4a.

[0034] The inner side of the welding ring 4 has a protruding bump 4b.

[0035] The number of protrusions 4b is several, and the several protrusions 4b are evenly distributed circumferentially on the inner side of the welding ring 4.

[0036] Bump 4b has two functions:

[0037] Firstly, during assembly, the protrusion 4b abuts against the side of the pole post 2, which serves to pre-position the pole post 2.

[0038] Secondly, after the upper plastic 5 is injected, the upper plastic 5 can improve the connection stability of the upper plastic 5 after it enters between two adjacent protrusions 4b.

[0039] The welding ring 4 and the protrusion 4b are an integral structure.

[0040] This effectively improves the structural compactness of welding ring 4.

[0041] The dimension between the connecting seat 1b and the lower part of the top cover plate 1 is smaller than the thickness of the top cover plate 1.

[0042] This structure makes good use of the space of the top cover plate 1 thickness, and avoids the pole post 2 extending too far out of the top cover plate 1 after installation.

[0043] The fixed cylinder 3 is set perpendicularly to the top cover plate 1.

[0044] The pole post 2 can be smoothly installed into the fixed cylinder 3, and the pole post 2 can also make stable contact with the connecting seat 1b.

[0045] The connecting part 4a is annular and located at the lower part of the welding ring 4, with the outer side of the connecting part 4a flush with the outer side of the welding ring 4.

[0046] The connection part 4a effectively increases the contact area between the welding ring 4 and the fixed cylinder 3, thereby improving the connection stability between the welding ring 4 and the fixed cylinder 3.

[0047] The connecting part 4a and the welding ring 4 are an integral structure.

[0048] The height of the fixing cylinder 3 is 1.5 times the thickness of the top cover plate 1. Depending on the actual situation, it is feasible for the height of the fixing cylinder 3 to be 2 or 3 times the thickness of the top cover plate 1.

[0049] The thickness of the fixing cylinder 3 is 0.3 times the thickness of the top cover plate 1. In practice, it is feasible for the thickness of the fixing cylinder 3 to be 0.5 times or 0.7 times the thickness of the top cover plate 1.

[0050] This structure ensures that the fixed cylinder 3 has appropriate strength while also preventing the fixed cylinder 3 from being too high or too thick.

[0051] During assembly, the battery cover plate with high impact resistance and stability is initially positioned at the connecting seat 1b inside the fixed cylinder 3, and the protrusion 4b on the welding ring 4 abuts against the outside of the electrode 2, so that the electrode 2 can be stably and accurately positioned inside the fixed cylinder 3.

[0052] Since the fixed cylinder 3 and the top cover plate 1 are an integral structure, and the welding ring 4 is connected inside the fixed cylinder 3, this structure replaces the existing technology of riveting the skirt at the end of the fixed cylinder 3. That is, in the existing technology, the force at the fixed cylinder 3 during riveting of the skirt is transmitted to the top cover plate 1, causing the top cover plate to deform.

[0053] Conversely, because this structure eliminates the need for riveting the skirt on the fixed cylinder, the battery cover is not only compact but also does not damage the top cover during assembly, making it highly practical.

[0054] When the battery cover with the above structure is subjected to a radial force at its fixing cylinder, it can withstand a force of 2000N in that direction. When the battery cover is subjected to an axial force along the fixing cylinder, it can withstand a force of 1500N in that direction. That is, the battery cover can withstand a force of 2000N in the Z-axis direction, and a force of 1500N in both the X and Y-axis directions.

[0055] Conversely, existing battery covers can only withstand a force of 1500N in the Z-axis direction. In the X and Y axes, they can only withstand a force of 800-1200N.

[0056] Of course, both ends of the top cover 1 have through connection holes, and each connection hole has a corresponding terminal post, fixing cylinder, and welding ring. The two terminals serve as the positive and negative terminals of the battery, respectively. Since the use of two terminals is existing technology in battery covers, this technical feature will not be described in detail in this embodiment.

[0057] 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.

[0058] 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, 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. An impact-resistant, high-stability battery cover plate comprising a top cover sheet and a pole, characterized in that, It also includes a connecting hole, a connecting seat, a fixing cylinder, and a welding ring. The connecting hole penetrates the top cover plate. The fixing cylinder is fixed to the upper part of the top cover plate and communicates with the connecting hole. The inner diameter of the fixing cylinder is larger than the inner diameter of the connecting hole, and the two are arranged on the same axis. The top cover plate also has a recessed connecting seat. The outer side of the connecting seat is flush with the inner side of the fixing cylinder. The inner side of the connecting seat is located at the side wall of the connecting hole. The pole is inserted through the connecting hole. The welding ring is fixed inside the fixing cylinder, and the pole is positioned between the welding ring and the connecting seat. The outer side of the welding ring has a connecting part, which increases the contact area between the welding ring and the inner wall of the fixing cylinder.

2. The shock-resistant, high-stability battery cover plate according to claim 1, characterized in that, The inner side of the welding ring has protruding bumps.

3. The shock-resistant, high-stability battery cover plate according to claim 2, characterized in that, The number of bumps is several, and the bumps are evenly distributed circumferentially on the inner side of the welding ring.

4. The shock-resistant, high-stability battery cover plate according to claim 3, characterized in that, The welding ring and the protrusion are an integral structure.

5. The shock-resistant, high-stability battery cover plate according to claim 1 or 2 or 3 or 4, characterized in that, The dimension between the connecting seat and the lower part of the top cover plate is smaller than the thickness of the top cover plate.

6. The shock-resistant, high-stability battery cover plate according to claim 1 or 2 or 3 or 4, characterized in that, The fixing cylinder is set perpendicular to the top cover plate.

7. The shock-resistant, high-stability battery cover plate according to claim 1, characterized in that, The connecting part is annular and located below the welding ring, with the outer side of the connecting part flush with the outer side of the welding ring.

8. The shock-resistant, high-stability battery cover plate according to claim 1 or 2 or 3 or 4, characterized in that, The connecting part and the welding ring are an integral structure.

9. The shock-resistant, high-stability battery cover plate according to claim 1 or 2 or 3 or 4, characterized in that, The height of the fixed cylinder is 1.5 to 3 times the thickness of the top cover plate.

10. The shock-resistant, high-stability battery cover plate according to claim 1 or 2 or 3 or 4, characterized in that, The thickness of the fixed cylinder is 0.3 to 0.7 times the thickness of the top cover plate.

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