Insulating part for power battery cover body assembly and cover body assembly
By designing annular protrusions and annular slopes at the edges of the mounting holes of the insulating components, the problems of insufficient insulation and high assembly precision in the power battery cover assembly are solved, achieving stable insulation and sealing performance and reducing the risk of self-discharge.
Patent Information
- Application Number
- CN202422658227.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the power battery cover assembly, the lack of downward protrusion at the edge of the mounting hole of the insulating component results in no insulation barrier between the terminal post and the terminal post mounting hole, which easily leads to self-discharge problems. Furthermore, existing improvement solutions have the risk of deformation or cracking of the insulating component due to high assembly precision or uncertainty in the expansion of the sealing ring.
An insulating component is designed with an annular protrusion extending downward along the edge of the mounting through hole on the substrate. The bottom outer side of the annular protrusion forms an annular slope that is lower on the inside and higher on the outside. The annular protrusion extends into the upper side of the pole mounting hole, providing clearance for the expansion of the sealing ring, reducing assembly accuracy requirements, and ensuring the stability of insulation and the sealing ring.
Complete insulation between the pole and the cover is achieved, reducing the risk of self-discharge, avoiding the deformation or cracking of the insulation components caused by the expansion of the sealing ring, and improving assembly efficiency and insulation effect.
Smart Images
Figure CN223552670U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to an insulating component and a cover assembly for a power battery cover assembly. Background Technology
[0002] Currently, lithium-ion and sodium-ion power batteries are gradually becoming mainstream products in the new energy industry due to their advantages such as high energy density, good capacity consistency, and ability to support high-rate charging and discharging.
[0003] A common power battery cover assembly includes a cover, terminals, a sealing ring, and an insulating component. The cover has a terminal mounting hole. The terminal includes a terminal body and a riveting block. The terminal body includes a main body and a limiting portion extending outward from the bottom of the main body. The main body extends upward through the terminal mounting hole. The limiting portion is located on the underside of the cover. The sealing ring is fitted onto the main body and sandwiched between the cover and the limiting portion, with a portion of the sealing ring extending into the terminal mounting hole. The riveting block is fitted and riveted to the end of the main body that extends out of the terminal mounting hole. The insulating component is disposed between the riveting block and the cover. This solution has the following technical problems:
[0004] 1. Considering the high accuracy of each component, the edges of the mounting holes of the insulating parts are generally not designed with downward protrusions. This will result in no insulation barrier between the terminals and the terminal mounting holes after the cover is assembled. If the distance between the two is too close or metal shavings / wires fall into the gap, it will cause the battery to self-discharge.
[0005] 2. In order to improve the self-discharge problem, some manufacturers set a downward protrusion on the edge of the mounting hole of the insulating component. First, (during assembly, the downward protrusion is easy to misalign and overlap with the edge of the pole mounting hole) requiring high assembly precision. Second, the uncertainty of the random expansion of the sealing ring during pole riveting causes problems for the downward protrusion of the insulating component: if the downward protrusion is too large, the sealing ring may expand, causing the insulating component to deform or crack; if the downward protrusion of the insulating component is too small, it is not enough to form an insulation barrier. Utility Model Content
[0006] The purpose of this utility model is to provide an insulating component and a cover assembly for a power battery cover assembly, which can solve at least one of the technical problems in the background art.
[0007] To achieve the above objectives, this utility model provides an insulating component for a power battery cover assembly. The insulating component is configured to insulate the cover and the terminal post on the cover. The insulating component includes a base plate portion, a mounting through hole in the middle of the base plate portion, and an annular protrusion extending downward along the edge of the mounting through hole. The bottom outer side of the annular protrusion has an annular slope that is lower on the inside and higher on the outside.
[0008] Optionally, an annular horizontal surface is formed on the inner side of the bottom of the annular protrusion, and the outer edge of the annular horizontal surface is connected to the inner edge of the annular slope.
[0009] Optionally, the outer edge of the annular slope is connected to the outer wall of the annular protrusion or the bottom surface of the substrate.
[0010] Optionally, the inner and outer walls of the annular protrusion extend vertically.
[0011] Optionally, the annular slope is an inclined plane with an angle between 30° and 60° with the horizontal plane.
[0012] Optionally, the height of the outer sidewall is 0mm to 0.4mm, and the width of the annular horizontal plane is 0mm to 0.2mm.
[0013] Optionally, an annular sidewall protrudes upward from the outer edge of the substrate, and the annular sidewall is configured to insulate the sidewall of the riveting block of the pole and the cover.
[0014] To achieve the above objectives, this utility model also provides a power battery cover assembly, including a cover, a terminal post, a sealing ring, and an insulating component as described above. The cover has a terminal post mounting hole. The terminal post includes a terminal post body and a riveting block. The terminal post body includes a main body and a limiting portion extending outward from the bottom of the main body. The main body passes upward through the terminal post mounting hole. The limiting portion is located on the lower side of the cover. The sealing ring is sleeved on the main body and sandwiched between the cover and the limiting portion. The sealing ring partially extends into the terminal post mounting hole. The riveting block is sleeved and riveted to one end of the main body that extends out of the terminal post mounting hole. The insulating component is disposed between the riveting block and the cover. The annular protrusion extends into the terminal post mounting hole to separate the main body from the sidewall of the terminal post mounting hole. When the sealing ring is compressed downward, the lower side of the annular slope provides upward expansion space for the sealing ring.
[0015] Optionally, a mounting groove is formed on the upper surface of the cover, and the base plate portion of the insulating member is mounted in the mounting groove.
[0016] Optionally, the substrate portion is provided with an anti-rotation protrusion protruding downwards, and the upper surface of the cover is formed with an anti-rotation groove adapted to the anti-rotation protrusion.
[0017] In this embodiment of the invention, the substrate portion of the insulating component extends downwards along the edge of the mounting through hole in an annular shape. The bottom outer side of the annular protrusion forms an annular slope that is lower on the inside and higher on the outside. When the insulating component is assembled to the cover, the annular protrusion extends into the upper side of the electrode mounting hole. The annular slope provides clearance for the random expansion of the sealing ring below the annular protrusion when compressed, reducing the precision requirements for sealing ring expansion and filling, making it easier to achieve complete insulation between the electrode and the cover, and avoiding the risk of self-discharge due to insufficient insulation. Simultaneously, it helps avoid the problems of an excessively long annular protrusion easily deforming or cracking due to sealing ring expansion, and an excessively short annular protrusion failing to form a complete insulating barrier with the expanded sealing ring. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the insulating component according to an embodiment of the present invention.
[0019] Figure 2 This is a three-dimensional structural schematic diagram of the insulating component from another perspective of an embodiment of this utility model.
[0020] Figure 3 This is a cross-sectional structural diagram of the insulating component according to an embodiment of this utility model.
[0021] Figure 4 This is another cross-sectional structural schematic diagram of the insulating component according to an embodiment of this utility model.
[0022] Figure 5 yes Figure 4 Enlarged view of part A in the middle.
[0023] Figure 6 This is a three-dimensional structural diagram of the cover assembly according to an embodiment of the present utility model.
[0024] Figure 7 This is a cross-sectional view of the cover assembly of the present invention before the sealing ring expands.
[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the cover assembly after the sealing ring has expanded, according to an embodiment of the present invention. Detailed Implementation
[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0027] It should be noted that in this utility model, "inner" and "outer" can be defined based on the center of the pole mounting hole. The position closer to the pole mounting hole and the position further away from the pole mounting hole can be called the inner.
[0028] Please see Figures 1 to 8 This utility model discloses an insulating member 10 for a power battery cover assembly. The insulating member 10 is configured to be disposed on the cover 20 to insulate the cover 20 and the terminal post 30. The insulating member 10 includes a base plate portion 11, a mounting through hole 12 is provided in the middle of the base plate portion 11, and an annular protrusion 13 protrudes downward along the edge of the mounting through hole 12. An annular slope 14 with a lower inner slope and a higher outer slope is formed on the outer side of the bottom of the annular protrusion 13.
[0029] In this embodiment of the invention, the base plate portion 11 of the insulating member 10 protrudes downward along the edge of the mounting through hole 12 with an annular protrusion 13. The bottom outer side of the annular protrusion 13 has an annular slope 14 that is lower on the inside and higher on the outside. When the insulating member 10 is assembled to the cover 20, the annular protrusion 13 extends into the upper side of the pole mounting hole 21. The annular slope 14 can provide clearance for the random expansion of the sealing ring 40 below the annular protrusion 13 when it is compressed, which can reduce the accuracy requirements for the expansion and filling of the sealing ring 40, and make it easier to achieve complete insulation between the pole 30 and the cover 20, thus avoiding the risk of self-discharge caused by insufficient insulation. At the same time, it helps to avoid the problems that the annular protrusion 13 is too long and easily deforms or cracks due to the expansion of the sealing ring 40, and that the annular protrusion 13 is too short and cannot form a complete insulation barrier with the expanded sealing ring 40.
[0030] In some embodiments, an annular horizontal surface 15 is formed on the inner side of the bottom of the annular protrusion 13, and the outer edge of the annular horizontal surface 15 is connected to the inner edge of the annular slope 14. After the sealing ring 40 expands, it abuts against the annular horizontal surface 15 and at least partially fills the clearance provided by the annular slope 14.
[0031] Specifically, the width of the annular horizontal plane 15 is 0 mm to 0.2 mm.
[0032] In some embodiments, the outer edge of the annular slope 14 is connected to the outer wall 16 of the annular protrusion 13 or the bottom surface of the substrate portion 11. With this arrangement, the annular slope 14 can serve as a guide for insertion. If the annular slope 14 is misaligned and rests on the edge of the pole mounting hole 21, the annular slope 14 can slide sideways to assist in correction, which helps to ensure the assembly speed of the insulating component 10.
[0033] Specifically, the inner wall 17 and the outer wall 16 of the annular protrusion 13 extend vertically.
[0034] Furthermore, the height of the outer wall 17 is 0 mm to 0.4 mm.
[0035] In some embodiments, the annular slope 14 is an inclined plane with an angle between 30° and 60° to the horizontal plane. Of course, the annular slope 14 is not limited to an inclined plane.
[0036] In a specific example, the optimal structure of the annular protrusion 13 is achieved by fine-tuning based on three conditions: the angle between the inclined plane and the horizontal plane is between 30° and 60°, the width of the annular horizontal plane 15 is 0mm to 0.2mm, and the height of the outer wall is 0mm to 0.4mm.
[0037] In some embodiments, an annular side stop 18 protrudes upward from the outer edge of the substrate portion 11, and the annular side stop 18 is configured as the sidewall of the rivet block 31 of the insulating pole post 30 and the cover 20.
[0038] In some embodiments, the insulating element 10 is made of plastic, specifically PPS or PP. However, this is not a limitation.
[0039] Please see Figures 1 to 8 This utility model embodiment also discloses a power battery cover assembly, including a cover 20, a terminal post 30, a sealing ring 40, and an insulating component 10 as described above. The cover 20 has a terminal post mounting hole 21. The terminal post 30 includes a terminal post body 32 and a riveting block 31. The terminal post body 32 includes a main body 321 and a limiting portion 322 extending outward from the bottom of the main body 321. The main body 321 passes upward through the terminal post mounting hole 21. The limiting portion 322 is located on the lower side of the cover 20. The sealing ring 40 is sleeved on the main body 321 and clamps... Located between the cover 20 and the limiting part 322, the sealing ring 40 extends into the pole mounting hole 21. The riveting block 31 is fitted and riveted to one end of the main body 321 that extends out of the pole mounting hole 21. The insulating part 10 is located between the riveting block 31 and the cover 20. The annular protrusion 13 extends into the pole mounting hole 21 to separate the main body 321 from the side wall of the pole mounting hole 21. When the sealing ring 40 is compressed downward (the sealing ring 40 is compressed downward when the pole 30 is riveted), the lower side of the annular slope 14 provides upward expansion space for the sealing ring 40.
[0040] In this embodiment of the invention, the base plate portion 11 of the insulating member 10 protrudes downward along the edge of the mounting through hole 12 with an annular protrusion 13. The bottom outer side of the annular protrusion 13 has an annular slope 14 that is lower on the inside and higher on the outside. When the insulating member 10 is assembled to the cover 20, the annular protrusion 13 extends into the upper side of the pole mounting hole 21. The annular slope 14 can provide clearance for the random expansion of the sealing ring 40 below the annular protrusion 13 when it is compressed, which can reduce the accuracy requirements for the expansion and filling of the sealing ring 40, and make it easier to achieve complete insulation between the pole 30 and the cover 20, thus avoiding the risk of self-discharge caused by insufficient insulation. At the same time, it helps to avoid the problems that the annular protrusion 13 is too long and easily deforms or cracks due to the expansion of the sealing ring 40, and that the annular protrusion 13 is too short and cannot form a complete insulation barrier with the expanded sealing ring 40.
[0041] In some embodiments, a mounting groove 22 is formed on the upper surface of the cover 20, and the substrate portion 11 of the insulating member 10 is mounted in the mounting groove 22.
[0042] In some embodiments, the substrate portion 11 is provided with an anti-rotation protrusion 19 protruding downwards, and the upper surface of the cover 20 is formed with an anti-rotation groove 23 adapted to the anti-rotation protrusion 19.
[0043] The above-disclosed examples are merely preferred embodiments of the present utility model, intended to facilitate understanding and implementation by those skilled in the art. They should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model are still within the scope of the present utility model.
Claims
1. An insulating component for a power battery cover assembly, the insulating component being configured to insulate the cover and the terminals on the cover, characterized in that, The insulating component includes a substrate portion, a mounting through hole is provided in the middle of the substrate portion, and an annular protrusion extends downward along the edge of the mounting through hole. The bottom outer side of the annular protrusion has an annular slope that is lower on the inside and higher on the outside.
2. The insulating component of the power battery cover assembly according to claim 1, characterized in that, An annular horizontal surface is formed on the inner side of the bottom of the annular protrusion, and the outer edge of the annular horizontal surface is connected to the inner edge of the annular slope.
3. The insulating component of the power battery cover assembly according to claim 2, characterized in that, The outer edge of the annular slope is connected to the outer wall of the annular protrusion or the bottom surface of the substrate.
4. The insulating component of the power battery cover assembly according to claim 3, characterized in that, The inner and outer walls of the annular protrusion extend vertically.
5. The insulating component of the power battery cover assembly according to claim 4, characterized in that, The annular slope is an inclined plane with an angle between 30° and 60° with the horizontal plane.
6. The insulating component of the power battery cover assembly according to claim 5, characterized in that, The height of the outer sidewall is 0mm to 0.4mm, and the width of the annular horizontal plane is 0mm to 0.2mm.
7. The insulating component of the power battery cover assembly according to claim 1, characterized in that, An annular sidewall protrudes upward from the outer edge of the substrate, and the annular sidewall is configured to insulate the sidewall of the riveting block of the pole and the cover.
8. A power battery cover assembly, characterized in that, The device includes a cover, a pole, a sealing ring, and an insulating element as described in any one of claims 1 to 7. The cover has a pole mounting hole. The pole includes a pole body and a riveting block. The pole body includes a main body and a limiting portion extending outward from the bottom of the main body. The main body extends upward through the pole mounting hole. The limiting portion is located on the underside of the cover. The sealing ring is fitted onto the main body and sandwiched between the cover and the limiting portion. The sealing ring partially extends into the pole mounting hole. The riveting block is fitted and riveted to one end of the main body extending out of the pole mounting hole. The insulating element is disposed between the riveting block and the cover. An annular protrusion extends into the pole mounting hole to separate the main body from the sidewall of the pole mounting hole. When the sealing ring is compressed downward, the lower side of the annular slope provides upward expansion space for the sealing ring.
9. The power battery cover assembly according to claim 8, characterized in that, The upper surface of the cover is formed with a mounting groove, and the base plate portion of the insulating member is mounted in the mounting groove.
10. The power battery cover assembly according to claim 8, characterized in that, The base plate is provided with an anti-rotation protrusion protruding downwards, and the upper surface of the cover is formed with an anti-rotation groove that matches the anti-rotation protrusion.