A kind of detachable positioning pin for power battery

Abstract

This application provides a detachable positioning pin for power batteries, belonging to the field of new energy vehicle technology. The positioning pin includes a positioning post, a fixing bracket, and a connecting nut. The positioning post comprises multiple cylindrical segments of different diameters; the fixing bracket is detachably mounted on the positioning post and includes a U-shaped opening that mates with the cylindrical segments; the connecting nut is threadedly connected to the cylindrical segments. This positioning pin can be installed in just three steps: insertion, snapping, and tightening. Disassembly is performed in reverse. No complex tools or multiple people are required. Self-locking is achieved through a mechanical structure, reducing manpower and shortening assembly time. Simultaneously, the fixing bracket snaps into the positioning post through the U-shaped opening, and the two limiting flanges naturally conform to the two sides of the battery pack mounting point, forming a lateral constraint and preventing the fixing bracket from sliding or rotating along the battery pack surface. This ensures a rigid connection between the bracket and the battery pack mounting point, guaranteeing the axial perpendicularity and positional accuracy of the positioning post.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and more specifically, to a detachable positioning pin for a power battery. Background Technology

[0002] As the core energy storage device for new energy vehicles, the importance of the power battery system is self-evident. This system is not only highly integrated internally, but also has high energy density and is expensive, resulting in relatively high after-sales costs. In the manufacturing process of new energy vehicles, the installation of the power battery is an extremely critical and delicate step. Due to the large weight and volume of the power battery, any form of impact or tipping must be prevented during installation to avoid damage to the battery or even serious consequences such as fire.

[0003] In existing technologies, battery pack positioning and installation typically rely on positioning pins. However, traditional battery pack positioning pin designs are relatively simple, often employing a two-cylinder structure. One cylindrical section with a larger diameter acts as a stop cap to prevent the positioning pin from being fully inserted into the mounting hole, while the other cylindrical section with a smaller diameter serves the actual positioning function. Its diameter is slightly smaller than the mounting hole to allow for smooth insertion.

[0004] However, the existing positioning pins are prone to loosening during use and cannot be effectively kept in a fixed state. Because the assembly process requires ensuring precise alignment and a secure connection between the battery pack and the vehicle body, the positioning pins are prone to loosening. As a result, assembly workers have to take additional measures to ensure the stability of the positioning pins, such as using auxiliary tools or adding manpower. This not only increases the complexity and workload of the assembly process, but also reduces the assembly efficiency.

[0005] Therefore, there is an urgent need for a detachable positioning pin for power batteries. Utility Model Content

[0006] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, this application provides a detachable positioning pin for power batteries, which can be quickly disassembled and assembled, has a simple structure, is easy to operate, reduces assembly difficulty, and reduces assembly workload.

[0008] The detachable positioning pin for a power battery provided in this application includes a positioning post, a fixing bracket, and a connecting nut. The positioning post comprises multiple cylindrical segments of different diameters; the fixing bracket is detachably mounted on the positioning post and includes a U-shaped opening that mates with the cylindrical segments; the connecting nut is threadedly connected to the cylindrical segments.

[0009] In some embodiments, the fixing bracket includes two symmetrically arranged limiting flanges, which are integrally formed with the fixing bracket.

[0010] In some embodiments, the fixing bracket includes a handle disposed on the side of the fixing bracket away from the U-shaped opening.

[0011] In some embodiments, the positioning post includes: a first segment having an external thread that engages with the internal thread of the connecting nut; a second segment fixedly connected to the first segment; a cylindrical groove disposed at the end of the second segment away from the first segment, wherein the U-shaped opening engages with the cylindrical groove; a third segment disposed at the end of the cylindrical groove away from the second segment; and a truncated cone disposed at the end of the third segment away from the cylindrical groove, which is conical.

[0012] In some embodiments, the diameter of the locating pin satisfies the following condition: diameter of the second segment > diameter of the third segment > diameter of the first segment > diameter of the cylindrical groove.

[0013] In some embodiments, the diameter of the U-shaped opening satisfies the following condition: diameter of the third segment > diameter of the U-shaped opening > diameter of the cylindrical slot.

[0014] In some embodiments, the height of the cylindrical slot is 3mm and the thickness of the fixing bracket is 2.5mm.

[0015] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects:

[0016] This application provides a detachable positioning pin for power batteries that allows for quick assembly and disassembly. It features a simple structure, convenient operation, reduced assembly difficulty, and less assembly workload. The positioning pin passes through the mounting hole from below the battery pack mounting point, with the upper cylindrical section of the positioning pin extending beyond the battery pack mounting surface. The U-shaped opening of the fixing bracket is aligned with the matching diameter cylindrical section in the middle of the positioning pin and radially inserted, ensuring the bracket fits snugly against the surface of the battery pack mounting point. The connecting nut is then fitted onto the threaded cylindrical section at the bottom of the positioning pin and tightened along the thread direction until the nut is tightly fitted against the battery pack. The axial force of the nut presses the fixing bracket firmly against the surface of the battery pack mounting point. At this point, the positioning pin is fixed to the battery pack and cannot slide axially or radially. The battery pack with the positioning pin fixed can then be hoisted to a preset position on the vehicle body, aligning the upper cylindrical section of the positioning pin with the battery pack mounting point. The battery pack bracket is pre-installed on the vehicle body. Insert the bracket axially into the mounting hole. The positioning pin and the mounting hole work together to achieve precise positioning of the battery pack and the vehicle body bracket. After the battery pack and the vehicle body bracket are assembled, loosen the connecting nut in the reverse direction to release the clamping force on the fixed bracket. Remove the fixed bracket radially along the U-shaped opening. At this time, the positioning pin loses its fixed constraint and can be pulled out from below the battery pack mounting point to complete the disassembly. It can be reused for the next battery pack positioning operation. The installation can be completed in just three steps: insertion, snapping, and tightening. Disassembly is done in reverse. No complicated tools or multiple people are required. The mechanical structure achieves self-locking, reducing manpower input and shortening assembly time.

[0017] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the overall structure of the positioning pin in some embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the positioning post according to some embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a fixed bracket according to some embodiments of this application.

[0022] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0023] 1. Positioning pin; 11. First section; 12. Second section; 13. Cylindrical slot; 14. Third section; 15. Frustum; 2. Fixed bracket; 21. Handle; 22. Limiting flange; 23. U-shaped opening; 3. Connecting nut. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0026] The following reference Figures 1 to 3 This application describes a removable positioning pin for a power battery according to some embodiments.

[0027] like Figure 1 As shown, a detachable positioning pin for a power battery according to some embodiments of this application includes a positioning post 1, a fixing bracket 2, and a connecting nut 3. The positioning post 1 includes multiple cylindrical segments of different diameters; the fixing bracket 2 is detachably mounted on the positioning post 1 and includes a U-shaped opening 23 that mates with the cylindrical segments; the connecting nut 3 is threadedly connected to the cylindrical segments.

[0028] In this embodiment, the positioning post 1 is passed through the mounting hole from below the battery pack mounting point, so that the upper cylindrical section of the positioning post 1 extends beyond the battery pack mounting surface. The U-shaped opening 23 of the fixing bracket 2 is aligned with the cylindrical section of the positioning post 1 with the appropriate diameter in the middle, and is inserted radially to ensure that the fixing bracket 2 is in close contact with the surface of the battery pack mounting point. The connecting nut 3 is then fitted onto the threaded cylindrical section at the bottom of the positioning post 1 and tightened along the thread direction until the nut is tightly fitted with the battery pack. The axial force of the nut presses the fixing bracket 2 against the surface of the battery pack mounting point. At this point, the positioning post 1 is fixed to the battery pack and cannot be axially or... The battery pack, with the positioning pin already fixed, is lifted to a preset position on the vehicle body by radial sliding. The upper cylinder of the positioning pin 1 is aligned with the mounting hole of the battery pack bracket pre-installed on the vehicle body and inserted axially into the hole. Through the cooperation between the positioning pin 1 and the mounting hole, the battery pack and the vehicle body bracket are accurately positioned. After the battery pack and the vehicle body bracket are assembled, the connecting nut 3 is loosened in the reverse direction to release the clamping force on the fixing bracket 2. The fixing bracket 2 is then removed radially along the U-shaped opening 23. At this time, the positioning pin 1 loses its fixed constraint and can be pulled out from below the battery pack installation point to complete the disassembly. It can be reused for the next battery pack positioning operation.

[0029] In this design, installation can be completed in just three steps: insertion, snapping, and tightening. Disassembly is done in reverse. No complicated tools or multiple people are required. The mechanical structure achieves self-locking, reducing manpower and shortening assembly time.

[0030] In some possible embodiments, such as Figure 3 As shown, the fixed bracket 2 includes two symmetrically arranged limiting flanges 22, which are integrally formed with the fixed bracket 2.

[0031] In this embodiment, after the fixed bracket 2 is inserted into the positioning post 1 through the U-shaped opening 23, the two limiting flanges 22 will naturally fit the two sides of the battery pack mounting point, forming a lateral constraint, preventing the fixed bracket 2 from sliding or rotating left and right along the surface of the battery pack, so that the bracket as a whole forms a rigid connection with the battery pack mounting point, ensuring the axial verticality and positional accuracy of the positioning post 1. Furthermore, the limiting flanges 22 and the edge of the battery pack mounting point have a unique matching position. During assembly, there is no need to repeatedly adjust the bracket angle. Simply align the flanges with the edge and insert them to achieve accurate positioning of the bracket, reducing the time cost of manual alignment.

[0032] In this design, the limiting flange 22 is integrally formed with the bracket body through stamping or casting processes, avoiding the weak points of welding or riveting, and can withstand greater tightening torque and vibration impact, preventing loosening after long-term use.

[0033] In some possible embodiments, such as Figure 3 As shown, the fixed bracket 2 includes a handle 21, which is located on the side of the fixed bracket 2 away from the U-shaped opening 23.

[0034] In this embodiment, the handle 21 serves as a force application point for manual operation, used to hold the bracket 2 and the positioning column 1 during assembly and disassembly, assisting in the quick insertion, removal or position adjustment of the bracket.

[0035] In some possible embodiments, such as Figure 2 , Figure 3 As shown, the positioning pin 1 includes: a first segment 11 with external threads that mate with the internal threads of the connecting nut 3; a second segment 12 fixedly connected to the first segment 11; a cylindrical groove 13 located at the end of the second segment 12 away from the first segment 11, with a U-shaped opening 23 mates with the cylindrical groove 13; a third segment 14 located at the end of the cylindrical groove 13 away from the second segment 12; and a frustum 15 located at the end of the third segment 14 away from the cylindrical groove 13, which is conical. The diameter of the positioning pin satisfies the following condition: diameter of the second segment 12 > diameter of the third segment 14 > diameter of the first segment 11 > diameter of the cylindrical groove 13.

[0036] In this embodiment, the frustum 15 is aligned with the mounting hole of the battery pack. The conical surface of the frustum 15 guides the positioning pin 1 to smoothly enter the hole until the second segment 12 completely passes through the mounting hole. The U-shaped opening 23 of the fixing bracket 2 is aligned with the cylindrical slot 13 and the fixing bracket 2 is pushed in horizontally. At this time, the bracket is constrained by the cylindrical slot 13 and the second segment 12 and cannot move axially or wobble horizontally. Thus, the connecting nut 3 is screwed into the thread of the first segment 11. The diameter difference between the first segment 11 and the second segment 12 is used to limit the nut from being over-tightened. Finally, the clamping force of the nut fixes the fixing bracket 2 and the positioning pin 1 to the battery pack.

[0037] In some possible embodiments, such as Figure 2 , Figure 3 As shown, the diameter of the U-shaped opening 23 satisfies the following conditions: the diameter of the third segment 14 > the diameter of the U-shaped opening 23 > the diameter of the cylindrical slot 13; the height of the cylindrical slot 13 is 3mm, and the thickness of the fixing bracket 2 is 2.5mm.

[0038] In this embodiment, since the diameter of the third segment 14 is greater than the diameter of the U-shaped opening 23, the U-shaped opening 23 cannot be inserted into the third segment 14, which has a larger diameter. The diameter of the U-shaped opening 23 is greater than the diameter of the cylindrical slot 13, meaning the width of the U-shaped opening 23 is slightly larger than the cylindrical slot 13. This ensures that the U-shaped opening 23 can be smoothly inserted into the cylindrical slot 13, while avoiding radial wobbling caused by excessive gap. At the same time, the height of the slot is slightly greater than the thickness of the bracket, leaving a 0.5mm assembly gap. This ensures that after the bracket is inserted into the slot, it can be fully embedded in the slot to achieve axial positioning, without jamming due to excessive size, thus ensuring smooth assembly and disassembly.

[0039] When using the detachable positioning pin for power batteries, the positioning pin 1 is passed through the mounting hole from below the battery pack mounting point, so that the third section 14 extends out of the battery pack mounting surface. The frustum 15 serves as a guide structure, guiding the positioning pin 1 smoothly through its conical surface characteristics. This aligns the U-shaped opening 23 of the fixing bracket 2 with the cylindrical slot 13, and the bracket is pushed horizontally until the bottom surface of the bracket is in contact with the battery pack mounting surface, preventing axial detachment. At the same time, the limiting flanges 22 on both sides of the fixing bracket 2 naturally fit against the edge of the battery pack mounting point, forming a lateral constraint. This allows the connecting nut 3 to be screwed into the thread of the first section 11, utilizing the first... The difference between the diameter of segment 11 and the diameter of the second segment 12 forms a step, which limits the tightening stroke of the nut. After the nut is tightened, a clamping force is generated, which fixes the bracket and the positioning pin 1 on the battery pack, preventing axial or radial movement. This allows the battery pack with the positioning pin already fixed to be installed in the preset position on the vehicle body, achieving precise positioning of the battery pack and the vehicle body bracket. After the battery pack and the vehicle body bracket are assembled, the connecting nut 3 is loosened in the reverse direction to release the clamping force on the fixed bracket 2. The fixed bracket 2 is then removed radially along the U-shaped opening 23. At this time, the positioning pin 1 loses its fixed constraint and can be pulled out from below the battery pack installation point to complete the disassembly.

[0040] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A detachable positioning pin for a power battery, characterized in that, include: The positioning post consists of multiple cylindrical segments of different diameters; A fixed bracket is detachably mounted on the positioning post, and the fixed bracket includes a U-shaped opening that mates with the cylindrical section; Connecting nut, which is threadedly connected to the cylindrical section.

2. The detachable positioning pin for a power battery according to claim 1, characterized in that: The fixed bracket includes two symmetrically arranged limiting flanges, which are integrally formed with the fixed bracket.

3. The detachable positioning pin for a power battery according to claim 1, characterized in that: The fixing bracket includes a handle, which is located on the side of the fixing bracket away from the U-shaped opening.

4. The detachable positioning pin for a power battery according to claim 1, characterized in that, The positioning post includes: The first section has an external thread that mates with the internal thread of the connecting nut; The second segment is fixedly connected to the first segment; A cylindrical slot is provided at the end of the second segment away from the first segment, and the U-shaped opening mates with the cylindrical slot; The third segment is located at the end of the cylindrical slot away from the second segment; A frustum, located at the end of the third segment furthest from the cylindrical slot, is cone-shaped.

5. The detachable positioning pin for a power battery according to claim 4, characterized in that: The diameter of the positioning pin satisfies the following condition: diameter of the second segment > diameter of the third segment > diameter of the first segment > diameter of the cylindrical groove.

6. The detachable positioning pin for a power battery according to claim 5, characterized in that: The diameter of the U-shaped opening satisfies the following condition: diameter of the third segment > diameter of the U-shaped opening > diameter of the cylindrical slot.

7. The detachable positioning pin for a power battery according to claim 4, characterized in that: The height of the cylindrical slot is 3mm, and the thickness of the fixing bracket is 2.5mm.

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