An anti-loosening structure device for securing battery modules

Abstract

This application relates to an anti-loosening structural device for fixing battery modules, belonging to the field of mechanical fastener technology. It includes a connector, two sets of fixing bolts, two sets of limiting members, and two sets of locking nuts, with each of the fixing bolts, limiting members, and locking nuts corresponding to one another. The connector has two circular through holes along its thickness for the fixing bolts to pass through. The limiting members have internal hexagonal holes corresponding to the circular through holes. The surface of the connector also has two vertically arranged fixing studs, each corresponding to a fixing bolt. The surface of the limiting members has arc-shaped guide holes for the fixing studs to pass through. The locking nuts are threaded to the end of the fixing studs that passes through the arc-shaped guide holes. This application addresses the rigid connection requirements in unilateral operation scenarios, solving the problem of traditional screws easily loosening in installation scenarios where nuts cannot be used.

Description

Technical Field

[0001] This application relates to the field of mechanical fastener technology, and in particular to an anti-loosening structural device for fixing battery modules. Background Technology

[0002] Battery modules are a key component of battery systems, consisting of several individual battery cells connected in series and parallel to form a complete unit. They are the basic building blocks of battery packs and have important applications in new energy equipment, rail transportation, and other fields. Currently, battery modules are typically secured using two methods: traditional mechanical anti-loosening and chemical fixing. Traditional mechanical anti-loosening often uses double nuts and spring washers, while chemical fixing typically uses thread-locking adhesive. However, both methods have drawbacks. Traditional mechanical anti-loosening requires operating space on both sides for double nuts, making it unsuitable for pre-tapping single-sided installation scenarios. Furthermore, conventional spring washers and nuts are prone to connection failure due to thread slippage or stress relaxation under high-frequency vibration environments. Thread-locking adhesive used in chemical fixing is prone to aging with temperature changes and is difficult to disassemble, requiring recoating and riveting after disassembly, resulting in low maintenance efficiency. Therefore, this application proposes an anti-loosening structure device for securing battery modules to address these problems. Utility Model Content

[0003] To address the rigid connection requirements in unilateral operation scenarios and solve the problem of traditional screws easily loosening in installation scenarios where nuts cannot be used, this application provides an anti-loosening structure device for fixing battery modules.

[0004] The anti-loosening structure device for fixing battery modules provided in this application adopts the following technical solution:

[0005] A non-loosening structure device for fixing a battery module includes a connector, two sets of fixing bolts, two sets of limiting members, and two sets of locking nuts, wherein the fixing bolts, limiting members, and locking nuts correspond one-to-one; the connector has two circular through holes along its thickness direction for the fixing bolts to pass through, the limiting members have internal hexagonal holes corresponding to the circular through holes, the surface of the connector is also provided with two vertically arranged fixing studs, the fixing studs correspond one-to-one with the fixing bolts, the surface of the limiting members has arc-shaped guide holes for the fixing studs to pass through, and the locking nuts are threaded to the end of the fixing studs that passes through the arc-shaped guide holes.

[0006] Preferably, the dimensions of the connector are 110mm*40mm*3mm, the diameter of the circular through hole of the connector is φD=6mm±0.5mm, the fixing stud is located 15mm below the corresponding circular through hole, and the diameter of the fixing stud is 5mm and the height is 12mm.

[0007] Preferably, the surface of the connector is provided with a first V-shaped anti-slip texture, the first V-shaped anti-slip texture is staggered, the depth of the first V-shaped anti-slip texture is 0.25mm, and the spacing is 0.5mm.

[0008] Preferably, the connector is made of stainless steel.

[0009] Preferably, the fixing bolt is an M5 hexagonal head bolt, the stud portion of the fixing bolt is 5mm long and 16mm in diameter, and the hexagonal width of the fixing bolt head is 8mm.

[0010] Preferably, the limiting member is circular, the size of the limiting member is φ35*3mm, the opening size of the internal hexagonal hole is 8.2mm±0.1mm, the internal hexagonal hole is sandblasted to Ra=1.6-3.2μm, the arc-shaped guide hole is centered on the center of the internal hexagonal hole with a central angle of 30°, the distance between the two arc-shaped sides is 6mm, and the two ends are 180°.

[0011] Preferably, the limiting member is provided with a second V-shaped anti-slip texture on both sides, the second V-shaped anti-slip textures are staggered, the depth of the second V-shaped anti-slip textures is 0.25mm, and the spacing is 0.5mm.

[0012] Preferably, the locking nut is an M5 non-metallic insert hexagonal locking nut with a thickness of 7mm, a through hole diameter of 5mm, and a hexagonal portion width of 8mm.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] 1. This application has a multi-level linkage anti-loosening function. Through the coordinated design of the connector, the limiting component and the locking nut, a dual anti-loosening effect is achieved. The connector provides basic connection and stress distribution. The limiting component fits tightly with the head of the fixing bolt through the internal hexagonal hole, restricting its circumferential rotation and forming a first-level rigid limit. The locking nut fits with the fixing stud of the connector and locks the limiting component through the arc-shaped guide hole, achieving a second-level dynamic locking.

[0015] 2. The device of this application has an adaptive stress distribution effect. Both the connecting parts and the limiting parts are provided with V-shaped anti-slip patterns. These anti-slip patterns can convert the transverse shear force into frictional resistance, effectively reduce the stress concentration of the thread, and optimize the stress distribution.

[0016] 3. The device in this application has a tolerance compensation mechanism. The limiting component adopts a sandblasting process, which increases the surface roughness and friction, thereby achieving effective tolerance compensation. Attached Figure Description

[0017] Figure 1This is a schematic diagram of a battery module fixing anti-loosening structure device according to an embodiment of this application.

[0018] Figure 2 This is a top view of the device according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Connector; 11. Circular through hole; 12. Fixing stud; 13. First V-shaped anti-slip texture; 2. Fixing bolt; 3. Limiting component; 31. Internal hexagonal hole; 32. Arc-shaped guide hole; 33. Second V-shaped anti-slip texture; 4. Locking nut. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0021] This application discloses an anti-loosening structural device for securing a battery module. (Refer to...) Figure 1 and Figure 2 It includes a connector 1, two sets of fixing bolts 2, two sets of limiting parts 3 and two sets of locking nuts 4, wherein the fixing bolts 2, the limiting parts 3 and the locking nuts 4 are set one-to-one.

[0022] Reference Figure 1 and Figure 2 The connector 1 is made of stainless steel and has dimensions of 110mm*40mm*3mm. Its surface has two circular through holes 11 symmetrically provided for the fixing bolt 2 to pass through. The diameter of the circular through holes 11 is φD=6mm±0.5mm. The fixing bolt 2 is an M5 hexagonal head bolt. The stud part of the fixing bolt 2 is 5mm long and 16mm in diameter. The hexagonal width of the head of the fixing bolt 2 is 8mm.

[0023] Reference Figure 1 and Figure 2 The limiting component 3 is circular and made of stainless steel. The limiting component 3 has a size of φ35*3mm. Its surface has an internal hexagonal hole 31 that passes through the head of the fixing bolt 2. The opening size of the internal hexagonal hole 31 is 8.2mm±0.1mm. The internal hexagonal hole 31 is sandblasted to Ra=1.6-3.2μm, so that the head of the fixing bolt 2 can be completely inserted into the internal hexagonal hole 31, effectively restricting the circumferential rotation of the fixing bolt 2, realizing first-level rigid limiting, and ensuring the stability and reliability of the anti-loosening effect.

[0024] Reference Figure 1 and Figure 2The surface of the connector 1 is also formed with two vertically arranged fixing studs 12, which correspond one-to-one with the central through holes. The fixing studs 12 are located 15mm below the corresponding circular through holes 11. The diameter of the fixing studs 12 is 5mm and the height is 12mm. The limiting member 3 has an arc-shaped guide hole 32 through it along the thickness direction for the fixing studs 12 to pass through. The arc-shaped guide hole 32 is centered on the center of the internal hexagonal hole 31, with a central angle of 30°, a distance of 6mm between the two arc-shaped sides, and 180° at both ends. The locking nut 4 is threaded to the fixing studs 12. Through one end of the arc-shaped guide hole 32, the locking nut 4 adopts an M5 non-metallic insert hexagonal locking nut 4 with a thickness of 7mm, a through hole diameter of 5mm, and a hexagonal part width of 8mm. The tight fit between the arc-shaped guide hole 32 and the inner hexagonal hole 31 of the limiting member 3 is the key to the precise nesting of the limiting member 3 in the fixing bolt 2. This structure is precisely designed to assist the inner hexagonal hole 31 in adapting to the hexagonal face position of the fixing bolt 2 by using the minimum circumferential rotation angle of the arc-shaped guide hole 32, thus ensuring the precise nesting and limiting of the inner hexagonal hole 31 of the limiting member 3.

[0025] Reference Figure 1 and Figure 2 The surface of the connector 1 is provided with a first V-shaped anti-slip texture 13, and the two sides of the limiting member 3 are provided with a second V-shaped anti-slip texture 33. The depth of the first V-shaped anti-slip texture 13 and the second V-shaped anti-slip texture 33 are both 0.25mm, and the spacing is both 0.5mm. The V-shaped anti-slip texture converts the transverse shear force into frictional resistance, reducing the stress concentration of the thread.

[0026] The implementation principle of the anti-loosening structure device for fixing a battery module according to an embodiment of this application is as follows: During use, pre-tapping is performed on the connected components. The connector 1 is placed on the surface of the connected components, with the circular through hole 11 on the connector 1 aligned with the pre-tapping hole on the connected components. The fixing bolt 2 is screwed into the pre-tapping hole of the connected components through the circular through hole 11 of the connector 1. The limiting member 3 is fitted onto the head of the fixing bolt 2, allowing the fixing stud 12 to pass through the arc-shaped guide hole 32. The locking nut 4 is then tightened. Once the screw is attached to the fixing stud 12 of the connector 1, it can be locked. In this application, the internal hexagonal hole 31 of the limiting member 3 is tightly fitted with the head of the fixing bolt 2 to restrict circumferential rotation. This is the first-level rigid limiting. The locking nut 4 and the fixing stud 12 are fitted with the arc-shaped guide hole 32 to lock the limiting member 3. This is the second-level dynamic locking. The V-shaped anti-slip texture of the connector 1 and the limiting member 3 converts the lateral shear force into frictional resistance, reduces the stress concentration of the thread, and thus solves the problem that traditional screws are easy to loosen in installation scenarios where nuts cannot be used.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An anti-loosening structure device for securing a battery module, characterized by: The device includes a connector, two sets of fixing bolts, two sets of limiting members, and two sets of locking nuts, with each of the fixing bolts, limiting members, and locking nuts corresponding to one another. The connector has two circular through holes along its thickness for the fixing bolts to pass through. The limiting members have internal hexagonal holes corresponding to the circular through holes. The surface of the connector also has two vertically arranged fixing studs, each corresponding to a fixing bolt. The surface of the limiting members has arc-shaped guide holes for the fixing studs to pass through. The locking nuts are threaded to the end of the fixing studs that passes through the arc-shaped guide holes.

2. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The dimensions of the connector are 110mm*40mm*3mm. The diameter of the circular through hole of the connector is φD=6mm±0.5mm. The fixing stud is located 15mm below the corresponding circular through hole. The diameter of the fixing stud is 5mm and the height is 12mm.

3. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The surface of the connector is provided with a first V-shaped anti-slip texture, which is staggered and has a depth of 0.25 mm and a spacing of 0.5 mm.

4. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The connector is made of stainless steel.

5. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The fixing bolt is an M5 hexagonal head bolt. The stud portion of the fixing bolt is 5mm long and 16mm in diameter. The hexagonal width of the fixing bolt head is 8mm.

6. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The limiting component is circular, with dimensions of φ35*3mm. The opening size of the internal hexagonal hole is 8.2mm±0.1mm. The internal hexagonal hole is sandblasted to Ra=1.6-3.2μm. The arc-shaped guide hole is centered on the center of the internal hexagonal hole, with a central angle of 30°, a distance of 6mm between the two arc-shaped sides, and 180° at both ends.

7. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The limiting member is provided with a second V-shaped anti-slip texture on both sides. The second V-shaped anti-slip textures are staggered and have a depth of 0.25 mm and a spacing of 0.5 mm.

8. The anti-loosening structure device for fixing a battery module according to claim 1, characterized in that: The locking nut is an M5 non-metallic insert hexagonal locking nut with a thickness of 7mm, a through hole diameter of 5mm, and a hexagonal part width of 8mm.

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