Support assembly, power device and vehicle

Abstract

The application provides a support assembly, a power device and a vehicle. The support assembly comprises a first support plate, part of the structure of the first support plate protrudes in the height direction of the vehicle to form a supporting protrusion and a first connecting portion located on the side of the supporting protrusion, the supporting protrusion comprises a top wall, the first connecting portion is spaced apart from the top wall in the height direction of the vehicle, one of the top wall and the first connecting portion is used for fixed connection with a vehicle frame, and the other is used for fixed connection with a power battery frame. The support assembly of the utility model, by the support assembly, the power battery frame and the vehicle frame are fixedly connected, the structure strength of the power battery frame is avoided to be reduced due to welding between the traditional power battery frame and the vehicle frame, and the material integrity and strength of the power battery frame are beneficial to be maintained. At the same time, it is also beneficial to disperse stress, reduce stress concentration at the connecting portion of the power battery frame and the vehicle frame, and further reduce the fatigue damage of the power battery frame in the long-term use process.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to a bracket assembly, a power unit, and a vehicle. Background Technology

[0002] In the development and production of new energy heavy-duty trucks, the power battery, as one of the core components, directly affects the vehicle's range and safety through its performance and reliability. As market demands for vehicle range continue to increase, the capacity requirements for power batteries are also growing. This necessitates considering how to effectively secure and support larger and heavier battery packs during the design and manufacturing process.

[0003] Traditionally, the power battery is housed within a frame structure, which is primarily fixed to the vehicle frame by welding. However, welding has some inherent drawbacks in practical applications. First, thermal deformation is prone to occur during welding, leading to a reduction in the material properties of the frame structure. Simultaneously, weld points often become stress concentration areas, making them susceptible to fatigue damage during long-term use. Utility Model Content

[0004] This application provides a bracket assembly, a power unit, and a vehicle. The bracket assembly mounts the power battery frame onto the vehicle frame, avoiding the reduction in structural strength of the power battery frame caused by welding between the power battery frame and the vehicle frame in traditional methods. This allows the power battery frame to maintain good support performance and helps extend the service life of the power battery frame.

[0005] In a first aspect, this application provides a bracket assembly for connecting a power battery frame and a vehicle frame, the bracket assembly comprising:

[0006] A first support plate, a portion of which protrudes along the height direction of the vehicle to form a support protrusion and a first connecting portion located on the side of the support protrusion. The support protrusion includes a top wall, and the first connecting portion is spaced apart from the top wall along the height direction of the vehicle. One of the top wall and the first connecting portion is used for fixed connection to the vehicle frame, and the other is used for fixed connection to the power battery frame.

[0007] The bracket assembly of this invention securely connects the power battery frame to the vehicle frame, avoiding the structural strength reduction caused by traditional welding between the power battery frame and the vehicle frame. This helps maintain the integrity and strength of the power battery frame materials. Simultaneously, the bracket assembly helps distribute stress, reducing stress concentration at the connection point between the power battery frame and the vehicle frame, thereby reducing fatigue damage to the power battery frame during long-term use.

[0008] In some embodiments, two first connecting portions are provided, and the two first connecting portions are respectively located on both sides of the support protrusion along the length direction of the vehicle.

[0009] In some embodiments, the first connecting portion is parallel to the top wall.

[0010] In some embodiments, the bracket assembly further includes: a second bracket plate fixedly connected to the first bracket plate, the second bracket plate including a second connecting portion, the second connecting portion being flush with the top wall, and the second connecting portion being fixedly connected to one of the vehicle frame or the power battery frame.

[0011] According to some embodiments of the present invention, the second support plate further includes a first mating portion, which is perpendicular to the second connecting portion.

[0012] The supporting protrusion includes a first mounting wall perpendicular to the length direction of the vehicle, and the first mating part is fixedly connected to the first mounting wall.

[0013] According to some embodiments of the present invention, the first mounting wall has a first mounting hole extending along the length of the vehicle, the first mating part has a first mating hole corresponding to the first mounting hole, and the first fastener passes through the first mounting hole and the first mating hole to fix the first bracket plate to the second bracket plate.

[0014] According to some embodiments of the present invention, two second bracket plates are provided, and the two second bracket plates are respectively connected to both sides of the support protrusion along the length direction of the vehicle. The second bracket plates are arranged opposite to the first connecting part.

[0015] In some embodiments, the first connecting portion has a second mounting hole extending along the vehicle height direction, and the frame has a second mating hole corresponding to the second mounting hole. A second fastener passes through the second mounting hole and the second mating hole to fix the first bracket plate to the frame; and / or

[0016] The top wall has a third mounting hole extending along the vehicle height direction. The power battery frame has a third mating hole corresponding to the third mounting hole. A third fastener passes through the third mounting hole and the third mating hole to fix the first bracket plate to the power battery frame; and / or,

[0017] The second connecting part has a fourth mounting hole that extends through the vehicle height direction. The power battery frame has a fourth mating hole corresponding to the fourth mounting hole. The fourth fastener passes through the fourth mounting hole and the fourth mating hole to fix the second bracket plate to the power battery frame.

[0018] Secondly, this application provides a power device for use in a vehicle. The power device includes: a power supply module, a power battery frame, the power supply module being disposed within the power battery frame, and the aforementioned bracket assembly, wherein the power battery frame is fixedly mounted on the vehicle frame via the bracket assembly.

[0019] The power unit of this invention, by using the aforementioned bracket assembly, helps to disperse stress and reduce stress concentration at the connection between the power battery frame and the vehicle frame. This reduces fatigue damage to the power battery frame during long-term use and extends the service life of the power unit. Simultaneously, it avoids the structural strength and performance degradation of the power battery frame caused by welding, allowing for the design of a power battery frame with greater load-bearing capacity and the adaptation to larger capacity batteries, thereby extending the vehicle's driving range.

[0020] Thirdly, embodiments of this application provide a vehicle, including: the aforementioned power unit; and a frame, wherein the power unit is fixedly mounted on the frame via a bracket assembly.

[0021] The vehicle of this utility model, by using the aforementioned power unit, is beneficial to extending the service life of the power unit. At the same time, to a certain extent, the aforementioned power unit can be adapted to a larger capacity power battery, thereby improving the vehicle's range. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 This is a schematic diagram of the power battery frame mounted on the vehicle frame according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded structural diagram of the power battery frame installed on the vehicle frame according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the support assembly according to an embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Bracket assembly;

[0028] 110. First support plate; 111. Support protrusion; 111a. Top wall; 111b. First mounting wall; 112. First connecting part;

[0029] 120. Second support plate; 121. Second connecting part; 122. First mating part;

[0030] 200. Power battery frame;

[0031] 300. Chassis.

[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0034] In the development and production of new energy heavy-duty trucks, the power battery, as one of the core components, directly affects the vehicle's range and safety through its performance and reliability. As market demands for vehicle range continue to increase, the capacity requirements for power batteries are also growing. This necessitates considering how to effectively secure and support larger and heavier battery packs during the design and manufacturing process.

[0035] Traditionally, the power battery is housed within a frame structure, which is primarily fixed to the vehicle frame by welding. However, welding has some inherent drawbacks in practical applications. First, thermal deformation is prone to occur during welding, leading to a reduction in the material properties of the frame structure. Simultaneously, weld points often become stress concentration areas, making them susceptible to fatigue damage during long-term use.

[0036] In view of this, this application provides a bracket assembly, a power unit, and a vehicle. The bracket assembly mounts the power battery frame onto the vehicle frame, avoiding the reduction in structural strength of the power battery frame caused by welding between the traditional power battery frame and the vehicle frame. This allows the power battery frame to maintain good support performance and helps extend the service life of the power battery frame.

[0037] For ease of explanation and understanding, please refer to... Figure 1 In this manual, the length direction of the vehicle can be the direction in which the frame extends, that is... Figure 1 The Y-direction shown can be either the left-right direction (or width direction) of the vehicle or a direction perpendicular to the Y-direction in the horizontal plane (not shown in the figure), and the height direction of the vehicle can be... Figure 1 The Z direction is shown.

[0038] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0039] refer to Figures 1 to 3 In one aspect, this application provides a bracket assembly 100 for connecting a power battery frame 200 and a vehicle frame 300. The bracket assembly 100 may include a first bracket plate 110, a portion of which protrudes along the height direction of the vehicle to form a support protrusion 111 and a first connecting portion 112 located on the side of the support protrusion 111. By providing the support protrusion 111, the bracket assembly 100 provides sufficient support for the power battery frame 200, which helps ensure the power battery remains stable during vehicle operation. This structure not only enhances the battery pack's fixation but also improves the overall vehicle safety performance.

[0040] The support protrusion 111 includes a top wall 111a, and a first connecting portion 112 is spaced apart from the top wall 111a along the height direction of the vehicle. One of the top wall 111a and the first connecting portion 112 is used for fixed connection to the frame 300, and the other is used for fixed connection to the power battery frame 200. For example, the support protrusion 111 can be fixedly connected to the frame 300, and the first connecting portion 112 can be fixedly connected to the power battery frame 200; or, the support protrusion 111 can be fixedly connected to the power battery frame 200, and the first connecting portion 112 can be fixedly connected to the frame 300. That is, the bracket assembly 100 of this application can still function normally even if the relative positions of the support protrusion 111 and the first connecting portion 112 are rotated 180°.

[0041] The support protrusion 111 and the first connecting part 112 can be fixed by fasteners such as bolts, nuts, pins, and column pins. Alternatively, they can be connected to the first connecting part 112 on one of the vehicle frame 300 or the power battery frame 200 by fasteners such as bolts, nuts, pins, and column pins, while the other (such as the vehicle frame 300) is fixed in a mounting groove that fits the support protrusion 111.

[0042] Thus, by using a non-welding connection method, on the one hand, the structural strength and performance of the power battery frame 200, which would otherwise be reduced due to welding, can be designed with a larger load-bearing capacity to accommodate power batteries with larger capacities, thereby extending the vehicle's driving range. On the other hand, the design of the bracket assembly 100 also makes the removal and replacement of the power battery more convenient, reducing the maintenance cost and time of the power battery and improving the vehicle's operating efficiency.

[0043] The bracket assembly 100 of this invention securely connects the power battery frame 200 to the vehicle frame 300, avoiding the structural strength reduction of the power battery frame 200 caused by traditional welding between the two. This helps maintain the material integrity and strength of the power battery frame 200. Simultaneously, the bracket assembly 100 helps distribute stress, reducing stress concentration at the connection between the power battery frame 200 and the vehicle frame 300, thereby reducing fatigue damage to the power battery frame 200 during long-term use.

[0044] In some embodiments, two first connecting portions 112 are provided, with the two first connecting portions 112 located on both sides of the support protrusion 111 along the length direction of the vehicle. By providing two first connecting portions 112 on both sides of the support protrusion 111, the support area of ​​the bracket assembly 100 is increased, significantly enhancing the stability of the bracket assembly 100 in the length direction of the vehicle. Simultaneously, this method of connecting on both sides of the support protrusion 111 effectively prevents lateral swaying of the power battery during vehicle operation, improving the overall structural stability. Furthermore, by providing two first connecting portions 112 on both sides of the support protrusion 111, the weight of the power battery and the dynamic load generated during vehicle operation are evenly distributed onto the frame 300, thereby reducing stress concentration, lowering the risk of structural fatigue damage to the bracket assembly 100, and extending the service life of the bracket assembly 100 and the power battery frame 200.

[0045] In some embodiments, the first connecting portion 112 is parallel to the top wall 111a. On the one hand, this helps improve the alignment accuracy of the first support plate during installation, making it easier for installers to ensure that the connecting components are on the same plane, thereby reducing installation errors and improving the overall structural stability of the vehicle. On the other hand, the design of the first connecting portion 112 being parallel to the top wall 111a optimizes the force transmission path, allowing the weight of the power battery and the dynamic load during vehicle operation to be transmitted to the frame 300 more directly and evenly, reducing unnecessary force loss. This results in good structural consistency of the bracket assembly 100 under stress, which is beneficial for even load distribution, reducing local stress concentration, and improving the durability and reliability of the bracket assembly 100.

[0046] In some embodiments, the first support plate 110 can be formed by bending the plate multiple times to create a structure with a supporting protrusion 111 in the middle and first connecting portions 112 on both sides. Alternatively, the first support plate 110 can be formed by directly processing the supporting protrusion 111 in the middle of the plate through stamping or sheet metal processes, with the remaining material forming the two first connecting portions 112, which is convenient for processing.

[0047] In some embodiments, the bracket assembly 100 may further include a second bracket plate 120 fixedly connected to the first bracket plate 110. The second bracket plate 120 includes a second connecting portion 121, which is flush with the top wall 111a and fixedly connected to either the vehicle frame 300 or the power battery frame 200. Thus, the second connecting portion 121 of the second bracket plate 120 increases the contact area between the top wall 111a and the connection target (vehicle frame 300 or power battery frame 200), providing additional support and enhancing the strength and stability of the entire bracket assembly 100, ensuring the stability of the power battery during vehicle operation. Simultaneously, it also helps to improve the load-bearing capacity of the power battery frame 200, allowing for the use of power batteries with larger capacities, thereby increasing the vehicle's range.

[0048] Furthermore, the addition of the second bracket plate 120 and the second connecting part 121 helps to further optimize the load distribution of the bracket assembly 100. The second bracket plate 120 and the second connecting part 121 provide multiple connection points. Through multi-point connection and support, the bracket assembly 100 can more effectively distribute and transfer the weight of the power battery and the dynamic load during vehicle operation, reduce local stress concentration, and improve the durability of the bracket assembly 100.

[0049] According to some embodiments of this utility model, the second bracket plate 120 further includes a first mating portion 122, which is perpendicular to the second connecting portion 121. This forms an L-shaped structure for the second bracket plate 120, which helps optimize the force transmission path on the bracket assembly 100 and improves the uniform dispersion effect when subjected to impact. The supporting protrusion 111 includes a first mounting wall 111b perpendicular to the length direction of the vehicle. The first mating portion 122 is fixedly connected to the first mounting wall 111b. For example, the first mating portion 122 and the first mounting arm can be fixedly connected by fasteners such as bolts, nuts, and pins. Alternatively, the first mounting wall 111b can be provided with a groove extending along the mounting direction of the second bracket plate 120 (such as the length direction of the vehicle body or the width direction of the vehicle body), and the first mating portion 122 is fixedly engaged in the groove.

[0050] This makes the second bracket plate 120 fixedly connected to the support protrusion 111, optimizes the force transmission path of the bracket assembly 100, improves the force distribution effect, and allows the weight of the power battery and the dynamic load of the vehicle to be more evenly distributed throughout the bracket assembly 100, which helps to reduce local stress concentration and thus extend the service life of the bracket assembly 100.

[0051] According to some embodiments of this utility model, the first mounting wall 111b has a first mounting hole extending along the length of the vehicle, and the first mating part 122 has a first mating hole corresponding to the first mounting hole. The corresponding design of the first mounting hole and the first mating hole ensures precise alignment of the components during installation. A first fastener passes through the first mounting hole and the first mating hole to fix the first bracket plate 110 and the second bracket plate 120 together. Optionally, the first fastener can be a bolt, nut, screw, stud, pin, or other fastener.

[0052] A secure connection between the first bracket plate 110 and the second bracket plate 120 is ensured by using a first fastener passing through aligned mounting holes and mating holes. This mechanical connection provides a high-strength fixation effect, enhancing the stability of the overall structure. The use of a first fastener connection also makes the disassembly and maintenance of the bracket assembly 100 more convenient. Compared to welding connections, fastener connections allow for quick disassembly and replacement without damaging components, reducing maintenance costs and time.

[0053] According to some embodiments of the present invention, two second bracket plates 120 may be provided, and the two second bracket plates 120 are respectively connected to the two sides of the support protrusion 111 along the length direction of the vehicle.

[0054] By providing two second support plates 120 on both sides of the support protrusion 111, the overall stability of the support assembly 100 is significantly enhanced. This symmetrical arrangement provides balanced support, ensuring the stability of the power battery during vehicle operation. The two second support plates 120 are arranged opposite to the first connecting part 112, forming a multi-point support structure, which helps to distribute the weight of the power battery and the dynamic load of the vehicle more evenly, reduces local stress concentration, and improves the durability of the structure.

[0055] Thus, the bracket assembly 100 is formed into a symmetrical structure, which helps to improve the torsional resistance of the bracket assembly 100 and can more effectively resist the torsional force caused by uneven road surface or sharp turns during vehicle operation, thus protecting the structural integrity of the power battery and the frame 300.

[0056] In some embodiments, the first connecting portion 112 has a second mounting hole extending along the vehicle height direction, and the frame 300 has a second mating hole corresponding to the second mounting hole. A second fastener passes through the second mounting hole and the second mating hole to fix the first bracket plate 110 to the frame 300. By using the second fastener passing through the aligned second mounting hole and second mating hole, a strong connection between the first bracket plate 110 and the frame 300 is ensured. This vertical mechanical connection provides a high-strength fixing effect, enhancing the stability of the overall structure. Optionally, the second fastener can be a bolt, nut, screw, stud, pin, or other fastener.

[0057] The top wall 111a has a third mounting hole extending along the vehicle height direction. The power battery frame 200 has a third mating hole corresponding to the third mounting hole. A third fastener passes through the third mounting hole and the third mating hole to fix the first bracket plate 110 to the power battery frame 200. By using the third fastener passing through the aligned third mounting hole and third mating hole, a firm connection between the first bracket plate 110 and the power battery frame 200 is ensured. Optionally, the third fastener can be a bolt, nut, screw, stud, pin, or other fastener.

[0058] The second connecting portion 121 has a fourth mounting hole extending along the vehicle height direction. The power battery frame 200 has a fourth mating hole corresponding to the fourth mounting hole. A fourth fastener passes through the fourth mounting hole and the fourth mating hole to fix the second bracket plate 120 to the power battery frame 200. By using the fourth fastener passing through the aligned fourth mounting hole and fourth mating hole, a firm connection between the second bracket plate 120 and the power battery frame 200 is ensured. Optionally, the third fastener can be a bolt, nut, screw, stud, pin, or other fastener.

[0059] This makes the bracket assembly 100 an integral structure, which helps to optimize the force transmission path on the bracket assembly 100. This allows the weight of the power battery and the dynamic load of the vehicle to be transmitted to the bracket structure more directly, reducing unnecessary force loss and stress concentration, and thus extending the service life of the bracket assembly 100.

[0060] Secondly, this application provides a power device for use in a vehicle. The power device may include a power supply module, a power battery frame 200, and the aforementioned bracket assembly 100. The power supply module is disposed within the power battery frame 200. The power battery frame 200 is fixedly mounted on the vehicle frame 300 via the bracket assembly 100.

[0061] Understandably, the power supply module may include at least one power battery, or the power supply module may include a battery pack formed by multiple power batteries.

[0062] The power unit of this invention, by using the aforementioned bracket assembly 100, helps to disperse stress and reduce stress concentration at the connection between the power battery frame 200 and the vehicle frame 300. This reduces fatigue damage to the power battery frame 200 during long-term use and extends the service life of the power unit. Simultaneously, it avoids the structural strength and performance degradation of the power battery frame 200 caused by welding, allowing for the design of a power battery frame 200 with greater load-bearing capacity and the adaptation to larger capacity batteries, thereby extending the vehicle's driving range.

[0063] Thirdly, embodiments of this application provide a vehicle, including: the aforementioned power unit; a frame 300, wherein the power unit is fixedly mounted on the frame 300 via a bracket assembly 100.

[0064] The vehicle of this utility model, by using the aforementioned power unit, is beneficial to extending the service life of the power unit. At the same time, to a certain extent, the aforementioned power unit can be adapted to a larger capacity power battery, thereby improving the vehicle's range.

[0065] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0067] In the description of this utility model, "multiple" means two or more.

[0068] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0069] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A support assembly (100), characterized in that, For connecting the power battery frame (200) and the vehicle frame (300), the bracket assembly (100) includes: A first support plate (110) has a portion of its structure protruding along the height direction of the vehicle to form a support protrusion (111) and a first connecting portion (112) located on the side of the support protrusion (111). The support protrusion (111) includes a top wall (111a). The first connecting portion (112) is spaced apart from the top wall (111a) along the height direction of the vehicle. One of the top wall (111a) and the first connecting portion (112) is used to be fixedly connected to the vehicle frame (300), and the other is used to be fixedly connected to the power battery frame (200).

2. The support assembly (100) according to claim 1, characterized in that, There are two first connecting parts (112), and the two first connecting parts (112) are respectively located on both sides of the support protrusion (111) along the length direction of the vehicle.

3. The support assembly (100) according to claim 1, characterized in that, The first connecting part (112) is parallel to the top wall (111a).

4. The support assembly (100) according to any one of claims 1-3, characterized in that, Also includes: The second support plate (120) is fixedly connected to the first support plate (110). The second support plate (120) includes a second connecting part (121), which is flush with the top wall (111a). The second connecting part (121) is fixedly connected to either the vehicle frame (300) or the power battery frame (200).

5. The support assembly (100) according to claim 4, characterized in that, The second support plate (120) further includes a first mating part (122), which is perpendicular to the second connecting part (121). The support protrusion (111) includes a first mounting wall (111b) perpendicular to the length direction of the vehicle, and the first mating part (122) is fixedly connected to the first mounting wall (111b).

6. The support assembly (100) according to claim 5, characterized in that, The first mounting wall (111b) has a first mounting hole that extends through the length of the vehicle, and the first mating part (122) has a first mating hole corresponding to the first mounting hole. The first fastener passes through the first mounting hole and the first mating hole so that the first bracket plate (110) is fixedly connected to the second bracket plate (120).

7. The support assembly (100) according to claim 6, characterized in that, There are two second bracket plates (120), which are respectively connected to the two sides of the support protrusion (111) along the length direction of the vehicle. The second bracket plates (120) are arranged opposite to the first connecting part (112).

8. The support assembly (100) according to claim 7, characterized in that, The first connecting part (112) has a second mounting hole extending along the vehicle height direction. The frame (300) has a second mating hole corresponding to the second mounting hole. A second fastener passes through the second mounting hole and the second mating hole, thereby fixing the first bracket plate (110) to the frame (300); and / or, The top wall (111a) has a third mounting hole extending along the vehicle height direction. The power battery frame (200) has a third mating hole corresponding to the third mounting hole. A third fastener passes through the third mounting hole and the third mating hole, thereby fixing the first bracket plate (110) to the power battery frame (200); and / or, The second connecting part (121) has a fourth mounting hole that extends through the vehicle height direction. The power battery frame (200) has a fourth mating hole corresponding to the fourth mounting hole. The fourth fastener passes through the fourth mounting hole and the fourth mating hole so that the second bracket plate (120) is fixedly connected to the power battery frame (200).

9. A power unit, characterized in that, Applied to vehicles, the power unit includes: Power supply module, A power battery frame (200), wherein the power supply module is disposed within the power battery frame (200); The bracket assembly (100) according to any one of claims 1-8, wherein the power battery frame (200) is fixedly mounted on the vehicle frame (300) via the bracket assembly (100).

10. A vehicle, characterized in that, include: The power unit as described in claim 9; The power unit is fixedly mounted on the frame (300) via a bracket assembly (100).

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