Top cover structure and battery
By using plastic parts and rivets between the pole and the cover plate, the problems of insufficient connection strength and high manufacturing difficulty between the pole and the cover plate are solved, achieving higher connection strength and lower manufacturing difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN KEDALI INDUSTRY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, the connection strength between the pole and the cover plate is insufficient and the manufacturing process is difficult, especially due to the high requirements for riveting or the low strength of the injection-molded structure.
A plastic part is fitted onto the pole, and the plastic part is connected to the cover plate by a riveting device. The plastic part is then riveted to the cover plate to fix the pole and the cover plate.
It improves the connection strength between the pole and the cover plate, while reducing the manufacturing difficulty, avoiding laser welding steps and riveting requirements, and simplifying the manufacturing process.
Smart Images
Figure CN224582347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a top cover structure and a battery. Background Technology
[0002] The battery cover has terminal post assemblies. To ensure a secure connection between the terminal post assemblies and the cover, different assembly methods can be used. In existing technology, the outward-facing ends of the terminal posts can be riveted so that the ends press against the riveting blocks on the cover. This method requires pre-riveting with a special jig and then final riveting with a special riveting mold. Since the riveted end faces of the terminal posts need to be able to conduct electricity normally with the outside world, the riveting requirements are high, making it a challenging process. Alternatively, injection-molded plastic can be used to fix the terminal posts, but this connection method has low structural strength. Utility Model Content
[0003] One objective of this invention is to provide a top cover structure that can ensure the connection strength between the pole and the cover plate while reducing manufacturing difficulty.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] A top cover structure is provided, comprising:
[0006] The cover plate has a first assembly hole and a second assembly hole;
[0007] The electrode post is partially inserted into the first mounting hole. The electrode post has a first end face facing the inside of the battery and a second end face facing the outside of the battery. The first end face abuts against the end face of the cover plate facing the outside of the battery.
[0008] A plastic part is sleeved on the terminal post, and the third end face of the plastic part facing the inside of the battery presses against the second end face. The plastic part has a third assembly hole.
[0009] A riveting assembly includes a riveting member, the riveting member being partially disposed within the second mounting hole and the third mounting hole, the riveting member being used to connect the plastic part and the cover plate.
[0010] Optionally, one end of the riveting member has a limiting protrusion and the other end has a riveting deformation protrusion, one of the limiting protrusion and the riveting deformation protrusion pressing against the plastic part, and the other pressing against the cover plate.
[0011] Optionally, a limiting groove is formed on the end face of the plastic part facing the outside of the battery, the third assembly hole is formed at the bottom of the limiting groove, and the riveting deformation protrusion is located inside the limiting groove.
[0012] Optionally, the riveting assembly further includes a protective washer, which is at least partially sandwiched between the sidewall of the limiting groove and the riveting deformation protrusion.
[0013] Optionally, the hardness of the protective gasket is greater than the hardness of the plastic part.
[0014] Optionally, the end face of the cover plate facing the inside of the battery has a positioning groove, the second assembly hole is formed at the bottom of the positioning groove, and the limiting protrusion abuts against the bottom of the positioning groove.
[0015] Optionally, the riveting assembly further includes a first sealing ring, which is sleeved on the riveting member and sandwiched between the limiting protrusion and the cover plate.
[0016] Optionally, the bottom of the positioning groove is further provided with a locking groove, and the first sealing ring is located in the locking groove, and the first sealing ring is sandwiched between the limiting protrusion and the bottom of the locking groove.
[0017] Optionally, the second end face is circumferentially arranged around the pole post, the third end face is an annular surface, and multiple second mounting holes, multiple third mounting holes and multiple riveting components are provided, with multiple riveting components spaced apart around the plastic part along the axial direction.
[0018] Another objective of this invention is to provide a battery that can reduce manufacturing difficulty while ensuring the connection strength between the terminal and the cover plate.
[0019] To achieve this objective, the present invention adopts the following technical solution:
[0020] A battery is provided, including a housing and the aforementioned top cover structure, the top cover structure covering an opening in the housing to form the outer casing of the battery.
[0021] The beneficial effects of this utility model are:
[0022] This utility model provides a top cover structure, including a cover plate, a terminal post, a plastic part, and a riveting assembly. The cover plate has a first mounting hole and a second mounting hole. The terminal post passes through the first mounting hole and has a first end face facing inwards towards the battery and a second end face facing outwards towards the battery. The first end face abuts against the end face of the cover plate facing outwards towards the battery. The plastic part is sleeved on the terminal post, and the third end face of the plastic part facing inwards towards the battery abuts against the second end face. The plastic part has a third mounting hole. The riveting assembly includes a riveting member, which passes through the second and third mounting holes and is used to connect the plastic part and the cover plate. This top cover structure uses the riveting member to rivet the plastic part onto the cover plate, and then uses the plastic part to press the terminal post against the cover plate, thus fixing the terminal post relative to the cover plate. Compared to a top cover structure that uses plastic injection molding to fix the terminal post, this top cover structure provides a higher connection strength between the terminal post and the cover plate. Compared to top cover structures with riveted electrode ends, this type of top cover structure has lower riveting requirements and is easier to manufacture. Furthermore, compared to top cover structures where the electrode is riveted to a rivet block, this type of top cover structure eliminates the need for laser welding, further reducing manufacturing difficulty.
[0023] This utility model also provides a battery, including a casing and the aforementioned top cover structure, the top cover structure being disposed over the opening of the casing to form the battery casing. This battery can ensure the connection strength between the terminals and the cover plate while reducing manufacturing difficulty. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the top cover structure provided in this embodiment of the utility model;
[0025] Figure 2 This is a partially exploded structural diagram of the top cover structure provided in this embodiment of the utility model;
[0026] Figure 3 This is a cross-sectional view of the top cover structure (before riveting) provided in this embodiment of the utility model;
[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle;
[0028] Figure 5 This is a cross-sectional view of the top cover structure (after riveting) provided in an embodiment of this utility model;
[0029] Figure 6 yes Figure 5 Enlarged view of point B in the middle.
[0030] In the picture:
[0031] 1. Cover plate; 11. First assembly hole; 12. Second assembly hole;
[0032] 2. Pole post; 21. First end face; 22. Second end face;
[0033] 3. Plastic part; 31. Third end face; 32. Third assembly hole; 33. Limiting groove;
[0034] 4. Riveted parts; 41. Limiting protrusions; 42. Riveting deformation protrusions;
[0035] 5. Protective gasket; 6. First sealing ring; 7. Lower plastic; 8. Second sealing ring; 9. Explosion-proof component. Detailed Implementation
[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] like Figures 1-6As shown, the top cover structure of this embodiment includes a cover plate 1, a terminal post 2, a plastic part 3, and a riveting assembly. The cover plate 1 has a first mounting hole 11 and a second mounting hole 12. The terminal post 2 partially passes through the first mounting hole 11. The terminal post 2 has a first end face 21 facing the inside of the battery and a second end face 22 facing the outside of the battery. The first end face 21 presses against the end face of the cover plate 1 facing the outside of the battery to prevent the terminal post 2 from moving relative to the cover plate 1 towards the inside of the battery. The plastic part 3 is fitted onto the terminal post 2, and the third end face 31 of the plastic part 3 facing the inside of the battery presses against the second end face 22, thus preventing the terminal post 2 from moving relative to the cover plate 1 towards the outside of the battery. The plastic part 3 has a third mounting hole 32. The riveting assembly includes a riveting member 4, which partially passes through the second mounting hole 12 and the third mounting hole 32. The riveting member 4 is used to connect the plastic part 3 and the cover plate 1 to further ensure the fixing ability of the plastic part 3 to the terminal post 2.
[0040] The top cover structure uses riveting parts 4 to rivet the plastic part 3 onto the cover plate 1, and the plastic part 3 presses the electrode post 2 against the cover plate 1, thus fixing the electrode post 2 relative to the cover plate 1. Compared with the top cover structure that fixes the electrode post 2 by plastic injection molding, this top cover structure has a higher connection strength between the electrode post 2 and the cover plate 1. Compared with the top cover structure that rivets the end of the electrode post 2, this top cover structure has lower riveting requirements and reduces manufacturing difficulty. Compared with the top cover structure that rivets the electrode post 2 onto the riveting block, this top cover structure does not require a laser welding step, which also reduces manufacturing difficulty.
[0041] Optionally, the second end face 22 is arranged around the axial direction of the pole post 2, and the third end face 31 is an annular surface, which can ensure that the pressure of the plastic part 3 against the pole post 2 is balanced along the circumference of the pole post 2, and prevent the pole post 2 from tilting due to uneven force.
[0042] Optionally, multiple second mounting holes 12, multiple third mounting holes 32, and multiple riveting components are provided. Each second mounting hole 12 corresponds to one third mounting hole 32. A riveting component 4 is inserted into one second mounting hole 12 and one third mounting hole 32. Multiple riveting components are spaced apart axially around the plastic part 3. Optionally, the multiple riveting components are evenly spaced axially around the plastic part 3 to ensure relatively balanced riveting pressure along the circumferential direction of the plastic part 3.
[0043] Optionally, in this embodiment, the plastic part 3 is annular, and four sets of riveting components are provided, with the four sets of riveting components evenly spaced. Of course, in other embodiments, two, three, five, or more sets of riveting components can also be provided, which can be adjusted according to the size of the plastic part 3 and other conditions.
[0044] Alternatively, in other embodiments, the plastic part 3 may also be elliptical or polygonal, and the riveting components may still be evenly spaced.
[0045] Optionally, such as Figure 4 and Figure 6 As shown, Figure 4 The riveted component 4 in the image is in its state before riveting. Figure 6 The riveting part 4 is in the riveted state. One end of the riveting part 4 has a limiting protrusion 41, and the other end is columnar before riveting. After riveting, the other end has a riveting deformation protrusion 42. One of the limiting protrusion 41 and the riveting deformation protrusion 42 presses against the plastic part 3, and the other presses against the cover plate 1.
[0046] Optionally, in this embodiment, the limiting protrusion 41 presses against the cover plate 1 and is located inside the battery, while the riveting deformation protrusion 42 presses against the plastic part 3 and is located outside the battery. A limiting groove 33 is formed on the end face of the plastic part 3 facing the outside of the battery, and a third mounting hole 32 is formed at the bottom of the limiting groove 33. The riveting deformation protrusion 42 is located inside the limiting groove 33 to prevent the height of the riveting deformation protrusion 42 from exceeding that of the plastic part 3 and scratching the external components.
[0047] Optionally, the sidewall of the limiting groove 33 is inclined and the sidewall is inclined toward the opening of the limiting groove 33 to form a trumpet-shaped limiting groove 33. This setting of the limiting groove 33 is conducive to the riveting member 4 fully riveting against the bottom and sidewall of the limiting groove 33.
[0048] To prevent damage to the plastic part 3 during the riveting process of the riveting component 4, and to avoid localized cracking or damage due to excessive stress on the plastic part 3, the riveting assembly may optionally include a protective washer 5. The protective washer 5 is at least partially sandwiched between the side wall of the limiting groove 33 and the riveting deformation protrusion 42. In this embodiment, the protective washer 5 is partially laid within the limiting groove 33, and the shape of the protective washer 5 conforms to the bottom and side wall of the limiting groove 33. The plastic part 3 also has a flush groove around the limiting groove 33, and the outer ring of the protective washer 5 is located within the flush groove to ensure that the end face of the protective washer 5 in contact with the outside is flat, and the outer ring of the protective washer 5 is flush with the end face of the plastic part 3 facing the outside of the battery.
[0049] Optionally, the hardness of the protective washer 5 is greater than that of the plastic part 3. Optionally, the protective washer 5 is made of metal to ensure strong structural strength while maintaining a relatively thin wall thickness.
[0050] Optionally, a positioning groove is provided on the end face of the cover plate 1 facing the inside of the battery, and the second mounting hole 12 is provided at the bottom of the positioning groove, with the limiting protrusion 41 abutting against the bottom of the positioning groove. Optionally, the end face of the limiting protrusion 41 is flush with the opening of the positioning groove, that is, the limiting protrusion 41 is completely located within the positioning groove, to prevent the limiting protrusion 41 from scratching the lower plastic 7 attached to the inside of the cover plate 1.
[0051] To ensure a seal at the four points of the riveting, the riveting assembly may optionally include a first sealing ring 6. The first sealing ring 6 is fitted onto the riveting 4 and sandwiched between the limiting protrusion 41 and the cover plate 1. When there are assembly or machining errors, there may be gaps between the limiting protrusion 41 and the cover plate 1. The first sealing ring 6 can seal the gaps and prevent leakage.
[0052] To facilitate the positioning of the first sealing ring 6 and prevent it from moving along the axial direction of the riveted part 4, optionally, a locking groove is also provided at the bottom of the positioning groove, the first sealing ring 6 is located in the locking groove, the diameter of the locking groove is smaller than the diameter of the positioning groove, and the first sealing ring 6 is sandwiched between the limiting protrusion 41 and the bottom of the locking groove.
[0053] Optionally, the top cover structure also includes a lower plastic 7, which is attached to the inside of the cover plate 1.
[0054] Optionally, the top cover structure also includes a second sealing ring 8, which is sleeved on the pole post 2. The second sealing ring 8 has an L-shaped cross-section. Part of the second sealing ring 8 is sandwiched between the side wall of the pole post 2 and the wall of the first mounting hole 11, and part is sandwiched between the first end face 21 of the pole post 2 and the outward-facing end face of the cover plate 1, so as to ensure that the gap between the pole post 2 and the cover plate 1 is sealed. Optionally, the second sealing ring 8 and the plastic part 3 have an overlapping position to ensure that the pole post 2 and the cover plate 1 will not short-circuit at their intersection.
[0055] Optionally, the top cover structure also includes an explosion-proof component 9, which is disposed at the explosion-proof through hole of the cover plate 1.
[0056] This embodiment also provides a battery, including a casing and the aforementioned top cover structure. The top cover structure covers the opening of the casing to form the battery casing. This battery can ensure the connection strength between the terminal 2 and the cover plate 1 while reducing manufacturing difficulty.
[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A roof structure, characterized in that include: Cover plate (1), the cover plate (1) is provided with a first assembly hole (11) and a second assembly hole (12); The electrode post (2) is partially inserted into the first mounting hole (11). The electrode post (2) has a first end face (21) facing the inside of the battery and a second end face (22) facing the outside of the battery. The first end face (21) presses against the end face of the cover plate (1) facing the outside of the battery. Plastic part (3), the plastic part (3) is sleeved on the electrode post (2), and the plastic part (3) presses against the second end face (22) with the third end face (31) facing the inside of the battery, and the plastic part (3) has a third assembly hole (32); The riveting assembly includes a riveting member (4), which is partially inserted into the second mounting hole (12) and the third mounting hole (32). The riveting member (4) is used to connect the plastic part (3) and the cover plate (1).
2. The roof structure of claim 1, wherein, One end of the riveting member (4) has a limiting protrusion (41), and the other end has a riveting deformation protrusion (42). One of the limiting protrusion (41) and the riveting deformation protrusion (42) presses against the plastic part (3), and the other presses against the cover plate (1).
3. The roof structure of claim 2, wherein, The plastic part (3) has a limiting groove (33) on its end face facing the outside of the battery. The third assembly hole (32) is opened at the bottom of the limiting groove (33). The riveting deformation protrusion (42) is located in the limiting groove (33).
4. The roof structure of claim 3, wherein, The riveting assembly also includes a protective washer (5), which is at least partially sandwiched between the side wall of the limiting groove (33) and the riveting deformation protrusion (42).
5. The top cover structure according to claim 4, characterized in that, The hardness of the protective gasket (5) is greater than that of the plastic part (3).
6. A roof construction according to any one of claims 2-5, characterised in that The cover plate (1) has a positioning groove on its end face facing the inside of the battery, and the second assembly hole (12) is opened at the bottom of the positioning groove. The limiting protrusion (41) abuts against the bottom of the positioning groove.
7. The roof structure of claim 6, wherein, The riveting assembly further includes a first sealing ring (6), which is sleeved on the riveting member (4) and sandwiched between the limiting protrusion (41) and the cover plate (1).
8. The roof structure of claim 7, wherein, The bottom of the positioning groove is also provided with a locking groove, and the first sealing ring (6) is located in the locking groove. The first sealing ring (6) is sandwiched between the limiting protrusion (41) and the bottom of the locking groove.
9. A roof construction according to any one of claims 1-5, c h a r a c t e r i s e d i n that The second end face (22) is circumferentially arranged around the pole post (2), the third end face (31) is an annular surface, and multiple second mounting holes (12), third mounting holes (32) and riveting components are provided. Multiple riveting components are spaced apart around the plastic part (3) axially.
10. A battery characterized by It includes a housing and a top cover structure as described in any one of claims 1-9, the top cover structure covering the opening of the housing to form the casing of the battery.