Battery system protection structure
By using a combined structure of studs, auxiliary steps and flange heads in the battery system protection structure, the problems of insufficient connection strength and high material cost in the prior art are solved, and a stronger battery system protection is achieved, reducing costs and Difficulty in processing.
Patent Information
- Application Number
- CN202420681358.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing battery system protective structures have shortcomings in terms of connection strength and material cost, especially due to the inefficiency and high cost of inlaying steel bushings, and the failure of the bolt head to substantially tighten the bottom guard plate, posing a mechanical safety risk.
Using a combined structure of studs, auxiliary steps and flange heads, instead of inlaid steel bushings, the auxiliary steps are inserted into the mounting holes and studs are connected to the nuts, and the flange heads are against the bottom guard plate and away from the side, which improves the connection strength and reduces the material. cost.
It improves the connection strength between the bottom guard plate and the battery system, reduces material cost and processing difficulty, enhances the mechanical connection safety of the battery system, and provides more reliable protection.
Smart Images
Figure CN222168594U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy vehicles, in particular to a battery system protection structure. Background Art
[0002] In recent years, new energy vehicles have developed rapidly, and their safety has always been one of the focuses of attention. The battery system is an important factor affecting the safety of new energy vehicles. In order to increase the protection of the battery system, a bottom guard plate is usually set at the bottom of the battery system, and the bottom guard plate is locked to the bottom of the battery system by bolts and nuts.
[0003] Since the bottom guard plate is usually made of impact-resistant composite materials, in order to ensure the connection strength, it is necessary to set a steel bushing in the mounting hole on the bottom guard plate, and then insert the bolt into the steel bushing for connection. The inlay of the steel bushing is generally done manually, which is inefficient and has a relatively high material cost. Sometimes, the bolt head only presses on the steel bushing without actually pressing the bottom guard plate, which poses a high mechanical safety risk.
[0004] Therefore, it is urgent to improve the protection structure of the battery system to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a battery system protection structure, which eliminates the need to embed a steel bushing on a bottom guard plate, thereby reducing material costs and improving processing efficiency, while also increasing the connection strength between the bottom guard plate and the battery system.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Battery system protection structure, including:
[0008] A battery system, wherein a plurality of first mounting holes are provided on the bottom side of the battery system;
[0009] A bottom guard plate, the bottom guard plate is arranged on the bottom side of the battery system, and the bottom guard plate is provided with a plurality of second mounting holes which are directly opposite to the first mounting holes one by one;
[0010] A connecting piece, the connecting piece includes a nut and a bolt, the nut is arranged in the first mounting hole, the bolt includes a stud, an auxiliary step and a flange head connected in sequence, the stud is inserted into the second mounting hole and is threadedly connected with the nut, and the auxiliary step is inserted into the second mounting hole, and the flange head is against the side of the bottom guard plate facing away from the battery system.
[0011] As an optional solution, the outer diameter of the auxiliary step is smaller than or equal to the inner diameter of the second mounting hole.
[0012] As an optional solution, the thickness of the flange head in the direction of the stud axis is not greater than 1.5 mm.
[0013] As an optional solution, a convex point is provided on a side of the flange head facing the top end of the stud.
[0014] As an optional solution, the protrusions are arranged in a circle along the circumference of the flange head.
[0015] As an optional solution, the protrusions are continuous protrusions.
[0016] As an optional solution, the protrusion is arranged on the edge of the flange head.
[0017] As an optional solution, the protrusion is configured as an arc-shaped protrusion that is smoothly connected to the flange head.
[0018] As an optional solution, a polygonal recess is provided on a side of the flange head facing away from the stud, and a screwing tool can be inserted into the polygonal recess to screw the bolt.
[0019] As an optional solution, the battery system includes a frame, the first mounting hole is arranged on the frame, and the nut is a rivet nut, which can be clamped on the frame when being pulled by the bolt.
[0020] Beneficial effects:
[0021] The battery system protection structure proposed by the utility model improves the structure of the bolt and sets an auxiliary step on the stud, so that the auxiliary step is inserted into the second mounting hole to replace the steel bushing embedded in the second mounting hole in the prior art, thereby achieving the effect of improving the connection strength between the bottom guard plate and the connecting piece. By setting the auxiliary step, the process of embedding the steel bushing in the second mounting hole is eliminated, which can reduce material costs on the one hand and improve processing efficiency on the other hand. Furthermore, by setting a flange head at the bottom end of the stud, the flange head can be pressed against the bottom side of the bottom guard plate, so as to be able to substantially press the bottom guard plate, thereby improving the mechanical connection strength between the bottom guard plate, the connecting piece and the battery system, so that the bottom guard plate can be more firmly installed on the bottom of the battery system, so as to provide more reliable protection for the battery system. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of a battery system protection structure provided by an embodiment of the utility model;
[0023] Figure 2 It is a partial cross-sectional view of the battery system protection structure provided by an embodiment of the utility model;
[0024] Figure 3 It is a schematic diagram of the structure of the bolt provided by the embodiment of the utility model at a viewing angle;
[0025] Figure 4 It is a schematic cross-sectional structure diagram of a bolt provided in an embodiment of the utility model;
[0026] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at A in the middle;
[0027] Figure 6 It is a schematic structural diagram of a bolt provided by an embodiment of the utility model from another perspective.
[0028] In the figure:
[0029] 1. battery system; 11. frame; 111. first mounting hole; 12. battery pack;
[0030] 2. Bottom guard plate; 21. Second mounting hole;
[0031] 3. Connector; 31. Nut; 32. Bolt; 321. Stud; 322. Flange head; 3221. Protrusion; 3222. Polygonal concave; 3223. Chamfered corner; 323. Auxiliary step;
[0032] 4. Sealing strip. DETAILED DESCRIPTION
[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0036] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0037] like Figure 1 As shown, the battery system 1 includes a battery pack 12 and a frame 11. The frame 11 is provided on opposite sides of the battery pack 12 to fix the battery pack 12 through the frame 11. When the battery system 1 is applied to a new energy vehicle, the bottom of the battery pack 12 faces the ground. During the driving of the vehicle, flying gravel may collide with the battery pack 12. In order to improve protection, a bottom guard plate 2 is provided at the bottom of the battery system 1 to prevent the battery pack from being hit by stones and provide collision protection.
[0038] The bottom guard plate 2 is made of composite materials, such as glass fiber and resin composite, which is light in weight and high in structural strength. The structural strength requirements can be met by using composite materials with a thickness of 2mm-3mm, which is in line with the development trend of lightweight new energy vehicles.
[0039] In order to connect and fix the bottom guard plate 2 to the bottom of the battery system 1, as shown in FIG. Figure 1 and Figure 2 As shown, in this embodiment, a battery system protection structure is proposed, a plurality of first mounting holes 111 are provided on the bottom side of the battery system 1, and a plurality of second mounting holes 21 facing the first mounting holes 111 are provided on the bottom guard plate 2. The battery system protection structure also includes a connector 3, the connector 3 includes a stud 321, an auxiliary step 323 and a flange head 322 connected in sequence, the stud 321 is inserted into the second mounting hole 21 and is threadedly connected with the nut 31, and the auxiliary step 323 is inserted into the second mounting hole 21, and the flange head 322 is against the side of the bottom guard plate 2 away from the battery system 1.
[0040] By improving the structure of the bolt 32, an auxiliary step 323 is set on the stud 321, so that the auxiliary step 323 is inserted into the second mounting hole 21, replacing the steel bushing embedded in the second mounting hole 21 in the prior art, so as to achieve the effect of improving the connection strength between the bottom guard plate 2 and the connecting member 3. By setting the auxiliary step 323, the process of embedding the steel bushing in the second mounting hole 21 is omitted, which can reduce the material cost on the one hand and improve the processing efficiency on the other hand. Furthermore, by setting the flange head 322 at the bottom end of the stud 321, the flange head 322 can be pressed against the bottom side of the bottom guard plate 2, so as to substantially press the bottom guard plate 2, thereby improving the mechanical connection strength between the bottom guard plate 2, the connecting member 3 and the battery system 1, so that the bottom guard plate 2 is more firmly installed on the bottom of the battery system 1, so as to provide more reliable protection for the battery system 1.
[0041] Specifically, Figure 2 As shown, the first mounting hole 111 is provided on the frame 11. Since the space inside the frame 11 is small, it is inconvenient to screw the nut 31. Therefore, the nut 31 is a pull rivet nut, which can be clamped on the frame 11 when pulled by the bolt 32. Among them, a plurality of first mounting holes 111 are arranged at intervals along the extension direction of the frame 11 to firmly connect the bottom guard plate 2 to the frame 11.
[0042] Alternatively, if Figure 2 As shown, a sealing strip 4 is sandwiched between the frame 11 and the bottom guard plate 2 to ensure a sealed connection between the bottom guard plate 2 and the frame 11 to prevent water or dust splashed during the driving of the vehicle from entering the battery pack 12 through the gap between the bottom guard plate 2 and the frame 11 and affecting the safety of the battery pack 12.
[0043] Specifically, the thickness of the sealing strip 4 is slightly greater than the thickness of the nut 31 between the frame 11 and the bottom guard plate 2. When the bolt 32 is tightened on the nut 31, the sealing strip 4 is squeezed and deformed to ensure the sealing performance.
[0044] In order to ensure that the bolt 32 is firmly connected to the bottom guard plate 2, the outer diameter of the auxiliary step 323 is set to be less than or equal to the inner diameter of the second mounting hole 21, so that the auxiliary step 323 can be smoothly inserted into the second mounting hole 21. Preferably, the outer diameter of the auxiliary step 323 is equal to the inner diameter of the second mounting hole 21, so that the auxiliary step 323 cannot shake in the second mounting hole 21 when inserted into the second mounting hole 21, so that the bottom guard plate 2 is installed more firmly and will not shake. Of course, the outer diameter of the auxiliary step 323 can also be set to be slightly smaller than the inner diameter of the second mounting hole 21, which can also play a role in enhancing the connection strength between the bottom guard plate 2 and the bolt 32, and it is easier to insert the bolt 32 into the second mounting hole 21, and the assembly is faster.
[0045] Optionally, the thickness of the flange head 322 in the axial direction of the stud 321 is not greater than 1.5 mm, that is, the maximum length of the bolt 32 exposed to the bottom side of the bottom guard plate 2 is only 1.5 mm, which reduces the occupied space and can better meet the development needs of miniaturization of the battery system 1. The thickness of the flange head 322 in the axial direction of the stud 321 can be set according to actual needs and is not limited here.
[0046] Alternatively, if Figure 3-Figure 5 As shown, a protrusion 3221 is provided on one side of the flange head 322 facing the top of the stud 321. After the bolt 32 is tightened, the protrusion 3221 contacts the bottom guard plate 2, which can make the flange head 322 fit more closely with the bottom guard plate 2 and have a certain tension force, which can enhance the locking strength of the bolt 32 on the bottom guard plate 2.
[0047] Specifically, Figure 3 As shown, the protrusions 3221 are arranged in a circle along the circumference of the flange head 322 to uniformly contact the bottom guard plate 2, so that the bolts 32 provide uniform locking force to the bottom guard plate 2.
[0048] In this embodiment, the convex point 3221 is a continuous convex point, which is more convenient to process and has better structural strength. Of course, in other embodiments, the convex point 3221 can also be set as a discrete convex point, such as setting three or more convex points 3221. In this case, the multiple convex points 3221 are preferably evenly spaced to ensure that the bottom guard plate 2 is evenly stressed.
[0049] Alternatively, if Figure 3 As shown, the protrusion 3221 is arranged on the edge of the flange head 322 so that the protrusion 3221 covers a larger area on the bottom guard plate 2, which helps to make the abutment with the bottom guard plate 2 more stable.
[0050] Alternatively, if Figure 5 As shown, the convex point 3221 is set as an arc-shaped protrusion, which is smoothly connected to the flange head 322. By setting the convex point 3221 as an arc-shaped protrusion, the surface of the convex point 3221 is relatively smooth, which can prevent the convex point 3221 from causing scratches, marks and other damages to the bottom guard plate 2.
[0051] Alternatively, if Figure 5 As shown, the bottom side edge of the flange head 322 is provided with a rounded corner 3223, so that the surface of the flange head 322 is relatively smooth, which can prevent the flange head 322 from being entangled with debris during the driving of the vehicle and has a more beautiful appearance.
[0052] like Figure 6As shown, in order to facilitate the screwing operation of the bolt 32, a polygonal recess 3222 is provided on the side of the flange head 322 away from the stud 321, and a screwing tool can be inserted into the polygonal recess 3222 to screw the bolt 32, so as to facilitate the disassembly and assembly of the bolt 32. In this embodiment, a hexagonal recess is provided on the bottom side of the flange head 322, and a conventional wrench tool can be used.
[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A battery system protection structure, characterized in that: include: A battery system (1), wherein a plurality of first mounting holes (111) are provided on a bottom side surface of the battery system (1); A bottom guard plate (2), the bottom guard plate (2) being arranged on the bottom side of the battery system (1), and the bottom guard plate (2) being provided with a plurality of second mounting holes (21) which are directly opposite to the first mounting holes (111); A connecting member (3), the connecting member (3) comprising a nut (31) and a bolt (32), the nut (31) being arranged in the first mounting hole (111), the bolt (32) comprising a stud (321), an auxiliary step (323) and a flange head (322) connected in sequence, the stud (321) being inserted into the second mounting hole (21) and being threadedly connected to the nut (31), and the auxiliary step (323) being inserted into the second mounting hole (21), and the flange head (322) being against a side of the bottom guard plate (2) facing away from the battery system (1).
2. The battery system protection structure according to claim 1, characterized in that: The outer diameter of the auxiliary step (323) is smaller than or equal to the inner diameter of the second mounting hole (21).
3. The battery system protection structure according to claim 1, characterized in that: The thickness of the flange head (322) in the axial direction of the stud (321) is not greater than 1.5 mm.
4. The battery system protection structure according to claim 1, characterized in that: A convex point (3221) is provided on one side of the flange head (322) facing the top end of the stud (321).
5. The battery system protection structure according to claim 4, characterized in that: The protrusions (3221) are arranged in a circle along the circumference of the flange head (322).
6. The battery system protection structure according to claim 5, characterized in that: The protrusions (3221) are continuous protrusions.
7. The battery system protection structure according to claim 4, characterized in that: The protrusion (3221) is arranged on the edge of the flange head (322).
8. The battery system protection structure according to claim 4, characterized in that: The protrusion (3221) is configured as an arc-shaped protrusion and is smoothly connected to the flange head (322).
9. The battery system protection structure according to any one of claims 1 to 8, characterized in that: A polygonal recess (3222) is provided on the side of the flange head (322) facing away from the stud (321), and a screwing tool can be inserted into the polygonal recess (3222) to screw the bolt (32).
10. The battery system protection structure according to any one of claims 1 to 8, characterized in that: The battery system (1) comprises a frame (11), the first mounting hole (111) is arranged on the frame (11), the nut (31) is a rivet nut, and the rivet nut can be clamped on the frame (11) when being pulled by the bolt (32).