Battery frame assembly, power device and vehicle

Abstract

The invention relates to the technical field of new energy automobiles, and discloses a battery frame assembly, a power device and a vehicle, and the battery frame assembly comprises a bottom layer frame used for installing a battery pack; the at least one standard layer frame is arranged above the bottom layer frame in the height direction and comprises a supporting main body and a stand column arranged below the supporting main body; a battery pack can be placed above the supporting main body; the stand columns are suitable for being detachably connected with the other standard layer frame and the bottom layer frame located below the stand columns. And the bracket structure is arranged at the bottom of the bottom-layer frame and used for connecting the bottom-layer frame and the frame. By the adoption of the battery frame assembly, the battery pack can be directly and stably placed above the supporting body without avoiding other structures, and convenient installation is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a battery frame assembly, a power device and a vehicle. BACKGROUND

[0002] In recent years, new energy vehicles have developed rapidly due to their zero emission, low noise and low cost. New energy commercial vehicles have also emerged. Due to the limitation of battery capacity and density, new energy commercial vehicles are mainly used for short-distance transportation. In order to improve the endurance of new energy commercial vehicles, the battery pack needs to be increased. A single battery pack cannot meet the power demand. Currently, manufacturers arrange multiple battery packs in the battery frame by series or parallel connection. This arrangement requires high bearing capacity of the battery frame.

[0003] Due to the limitation of existing battery technology, the increase of battery capacity is positively correlated with the increase of battery weight. Therefore, the bearing capacity and performance of the battery frame are required to be high. Most of the current battery frames are mainly welded with section steel, which has simple structure, large weight and high cost. The operation convenience is poor during the installation of the battery and the subsequent after-sales maintenance process. SUMMARY

[0004] Therefore, the present application provides a battery frame assembly, a power device and a vehicle to solve the problem of inconvenient installation of the battery frame in the prior art.

[0005] In a first aspect, the present application provides a battery frame assembly, comprising: a bottom frame, the bottom frame being used for installing a battery pack; at least one standard layer frame, the standard layer frame being arranged above the bottom frame in the height direction, the standard layer frame comprising a support body and a stand column arranged below the support body; the upper side of the support body is suitable for placing the battery pack; the stand column is suitable for detachable connection with another standard layer frame or the bottom frame below it; a bracket structure, the bracket structure being arranged at the bottom of the bottom frame, and the bracket structure being used for connecting the bottom frame and a vehicle frame.

[0006] Advantages: The downward extension of the stand column makes the upper side of the support body free of shielding structures, and the battery pack can be placed smoothly from the upper side of the support body without avoiding other components, thereby improving the installation convenience of the battery pack; the standard layer frame can be stacked as needed in the height direction, and the number of standard layer frames can be configured according to the needs of the vehicle to meet the endurance requirements of the vehicle; the bracket structure bears the connection between the bottom frame and the vehicle frame, which can not only ensure the stability of the overall bearing, but also avoid deformation of the bottom frame under direct stress.

[0007] In an optional embodiment, the support body comprises: The first longitudinal beams are arranged at intervals. The first transverse beams are arranged between the adjacent two first longitudinal beams, and a plurality of the first transverse beams are arranged at intervals along the extension direction of the first longitudinal beams. The first transverse beams and the first longitudinal beams enclose a bearing area for mounting the battery pack. The bottom layer frame comprises a support frame for mounting the battery pack; the support frame comprises: The second longitudinal beams are arranged at intervals. The second transverse beams are arranged between the adjacent two second longitudinal beams, and a plurality of the second transverse beams are arranged at intervals along the extension direction of the second longitudinal beams. The second transverse beams and the second longitudinal beams enclose a bearing area for mounting the battery pack.

[0008] Beneficial effects: The first transverse beams and the second transverse beams are arranged at intervals, which can ensure the bearing strength, reduce the redundant material of the support body and the support frame, and realize lightweight design; in addition, the interval distance between the first longitudinal beams, the second longitudinal beams, the first transverse beams and the second transverse beams can be adjusted to adapt to battery packs of different sizes, improve the versatility of the assembly, and reduce the modification cost caused by the change of the size of the battery pack.

[0009] In an optional embodiment, an end of the column away from the support body is connected with a mounting plate, and the mounting plate is adapted to be connected with the first longitudinal beam or the second longitudinal beam.

[0010] Beneficial effects: The arrangement of the mounting plate can increase the contact area between the column and the first longitudinal beam or the second longitudinal beam, uniformly distribute the load transmitted by the column to the first longitudinal beam or the second longitudinal beam, avoid local stress concentration of the first longitudinal beam or the second longitudinal beam, and reduce the deformation risk of the first longitudinal beam or the second longitudinal beam.

[0011] In an optional embodiment, the standard layer frame further comprises a first ring beam arranged at the periphery of the support body. The bottom layer frame further comprises a second ring beam arranged at the periphery of the support frame.

[0012] Beneficial effects: The first ring beam and the second ring beam can provide positions for the installation of the skin and the fixation of the wire harness, and the arrangement of the first ring beam and the second ring beam can improve the overall rigidity and torsional performance of the support body and reduce the deformation caused by vibration during vehicle driving.

[0013] In an optional embodiment, a reinforcing plate is further included, the reinforcing plate comprises a first connecting portion and a second connecting portion arranged at an angle, the first connecting portion is used for connecting with the second longitudinal beam, and the second connecting portion is used for connecting with the bracket structure.

[0014] Beneficial effects: The reinforcing plate connects the bracket structure and the second longitudinal beam through the first connecting part and the second connecting part arranged at an angle, avoiding stress concentration caused by a large number of holes directly opened at the bottom of the second longitudinal beam, so that the second longitudinal beam is deformed or broken when bearing the weight of the battery pack; at the same time, the reinforcing plate can disperse the load transmitted by the bracket structure to a larger area of the second longitudinal beam, reducing the local stress of the second longitudinal beam.

[0015] In an optional embodiment, the bracket structure comprises: a first connecting surface, which is adapted to and detachably connected with the mounting surface of the vehicle frame; a second connecting surface, which is adapted to be detachably connected with the bottom frame; a diagonal brace, one end of which is connected with the first connecting surface, and the other end of which is connected with the second connecting surface, forming a triangular support structure among the diagonal brace, the first connecting surface and the second connecting surface.

[0016] Beneficial effects: The triangular support structure formed by the diagonal brace, the first connecting surface and the second connecting surface can improve the structural strength of the bracket itself by utilizing the non-deformable property of the triangle.

[0017] In an optional embodiment, the first connecting surface comprises a supporting sub-surface and a limiting sub-surface, and the supporting sub-surface and the limiting sub-surface are arranged at an angle; the mounting surface comprises a supporting sub-surface and a positioning sub-surface, the supporting sub-surface and the supporting sub-surface are adapted to receive the load, and the positioning sub-surface and the limiting sub-surface are fitted to limit the assembly displacement.

[0018] Beneficial effects: The supporting sub-surface and the supporting sub-surface are adapted to support the load, which can ensure that the weight of the battery frame assembly is evenly transmitted to the vehicle frame; during installation, the limiting sub-surface and the positioning sub-surface can be fitted to realize quick positioning of the mounting hole, without the need for repeated position adjustment; at the same time, the fitting of the limiting sub-surface and the positioning sub-surface can limit the relative displacement between the bracket structure and the vehicle frame, such as lateral displacement, to avoid loosening of the connection caused by vibration of the vehicle during the running process.

[0019] In an optional embodiment, the bracket structure is an integral cast structure.

[0020] Beneficial effects: The integral cast bracket structure has no splicing weld, and has stronger overall strength and fatigue resistance, which can bear the load of the battery pack for a long time without being easily damaged; the integral casting can realize lightweight design, and the weight of the bracket is lighter than that of the welded steel bracket, reducing the overall energy consumption of the vehicle.

[0021] In a second aspect, the present application further provides a power device, comprising a battery frame assembly and a battery pack installed on the battery frame assembly, wherein the battery pack is provided with a connecting plate at one end connected with the support main body and / or the bottom frame; the mounting plate, the connecting plate and the first longitudinal beam are sequentially inserted through the connecting piece; and / or, the mounting plate, the connecting plate and the second longitudinal beam are sequentially inserted through the connecting piece. Advantages: The mounting plate can increase the contact area between the battery pack and the longitudinal beam, disperse the weight load of the battery pack to the overall contact area of the mounting plate, and guarantee the load stability of the battery frame assembly.

[0022] In a third aspect, the present application further provides a vehicle, comprising: A vehicle body and a power device electrically connected with the vehicle body. Advantages: Since the vehicle comprises the power device, the vehicle has the same effects as the power device, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 2 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 1 It is a partial enlarged schematic diagram of A in FIG. 1; Figure 3 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 1 It is a partial enlarged schematic diagram of C in FIG. 1; Figure 4 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 1 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 5 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 2 It is a partial enlarged schematic diagram of B in FIG. 1; Figure 6 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 7 It is a schematic diagram of the overall battery frame assembly of the present application; Figure 8 It is a schematic diagram of the overall battery frame assembly of the present application;

[0025] Explanation of reference signs: 1, bottom frame; 11, support frame; 111, second cross beam; 112, second longitudinal beam; 12, second ring beam; 13, reinforcing plate; 131, first connecting part; 132, second connecting part; 2, standard layer frame; 21, stand column; 211, mounting plate; 22, support main body; 221, first cross beam; 222, first longitudinal beam; 23, first ring beam; 3, bracket structure; 31, first connecting surface; 311, support sub-surface; 312, limiting sub-surface; 32, second connecting surface; 33, diagonal brace; 4, battery pack; 41, connecting plate; 5, vehicle frame; 51, mounting surface; 511, bearing sub-surface; 512, positioning sub-surface. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] In recent years, new energy vehicles have developed rapidly due to their zero emission, low noise and low cost, and new energy commercial vehicles have also emerged. Due to the limitation of battery capacity and density, new energy commercial vehicles are mainly used for medium and short distance transportation. In order to improve the endurance mileage of new energy commercial vehicles, the battery pack needs to be increased. A single battery pack cannot meet the power demand. At present, manufacturers arrange multiple battery packs in the battery frame by series or parallel type. This arrangement requires high bearing capacity of the battery frame.

[0031] Due to the limitation of existing battery technology, the increase of battery capacity is positively correlated with the increase of battery weight, so the bearing and performance requirements of the battery frame for installing the battery are higher. At present, most of the battery frames are mainly welded with section steel, which has simple structure, large weight and high cost. The operation convenience is poor during the installation of the battery and the subsequent after-sales maintenance process.

[0032] Taking a 420-degree battery as an example, the battery is divided into 6 layers for installation. The total weight of the battery and the battery frame reaches three tons. When facing impact, braking and lifting conditions, the structural strength and rigidity requirements of the battery frame are higher. The section steel welded battery frame cannot be shared in different vehicle models, which increases the development and production management cost.

[0033] The embodiments of the present application are described below in combination with Figures 1 to 8 , the embodiments of the present application are described below in combination with

[0034] According to the embodiments of the present application, on the one hand, a battery frame assembly is provided, which comprises: a bottom frame 1, the bottom frame 1 is used for installing a battery pack 4; at least one standard layer frame 2 is arranged above the bottom frame 1 in the height direction, the standard layer frame 2 comprises a support body 22 and a stand column 21 arranged below the support body 22; the support body 22 is suitable for placing the battery pack 4 above; the stand column 21 is suitable for detachable connection with another standard layer frame 2 or the bottom frame 1 below; a bracket structure 3 is arranged at the bottom of the bottom frame 1, and the bracket structure 3 is used for connecting the bottom frame 1 and a vehicle frame 5.

[0035] The bottom frame 1 is used for directly installing the battery pack 4 as a basic bearing structure; at least one standard layer frame 2 can be stacked above according to the demand, the standard layer frame 2 bears the upper battery pack 4 through the bearing area above the support body 22, and realizes detachable connection with the bottom frame 1 or other standard layer frames 2 below by means of the stand column 21 extending downward. The stand column 21 can be designed as a U-shaped section to reduce weight and cost.

[0036] The bracket structure 3 is connected with the bottom layer frame 1 at one end through bolt fixing connection or the like, and is detachably connected with the vehicle frame 5 at the other end through bolts, thereby forming the transition connection between the bottom layer frame 1 and the vehicle. When disassembled for maintenance, the corresponding standard layer frame 2 or the bottom layer frame 1 is only loosened, and the battery frame and the battery pack 4 above are lifted away, so that the maintenance and replacement can be performed without layer-by-layer disassembly.

[0037] The downward extension of the stand column 21 allows the support body 22 to be free of shielding structures above, and the battery pack 4 can be directly and stably placed above the support body 22 without avoiding other components, thereby improving the installation convenience of the battery pack 4. The standard layer frame 2 can be stacked as needed along the height direction, and the number of layers of the standard layer frame 2 can be configured according to the needs of the vehicle to meet the vehicle endurance requirements. The bracket structure 3 bears the connection between the bottom layer frame 1 and the vehicle frame 5, which can not only ensure the stability of the overall load bearing, but also avoid deformation of the bottom layer frame 1 directly under stress.

[0038] In some embodiments, the support body 22 includes: a first longitudinal beam 222, at least two first longitudinal beams 222 are arranged at intervals; a first transverse beam 221 arranged between adjacent two first longitudinal beams 222, a plurality of first transverse beams 221 are arranged at intervals along the extension direction of the first longitudinal beam 222; the first transverse beam 221 and the first longitudinal beam 222 enclose a load bearing area for mounting the battery pack 4; the bottom layer frame 1 includes a support frame 11 for mounting the battery pack 4; the support frame 11 includes: a second longitudinal beam 112, at least two second longitudinal beams 112 are arranged at intervals; a second transverse beam 111 arranged between adjacent two second longitudinal beams 112, a plurality of second transverse beams 111 are arranged at intervals along the extension direction of the second longitudinal beam 112; the second transverse beam 111 and the second longitudinal beam 112 enclose a load bearing area for mounting the battery pack 4.

[0039] The first longitudinal beam 222 and the first transverse beam 221 of the support body 22 are both rectangular steel, and the second longitudinal beam 112 and the second transverse beam 111 of the support frame 11 of the bottom layer frame 1 are also rectangular steel. The rectangular steel not only has a large cross-sectional moment of inertia and strong structural stability, but also provides reliable load bearing for the battery pack 4. In addition, the rectangular steel has a smooth surface and is easy to process, which is convenient for welding or drilling operation. In specific assembly, the first longitudinal beam 222 and the first transverse beam 221 can be fixed by welding to form a stable load bearing frame. If later adjustment and maintenance are needed, high-strength bolts can be used for detachable connection. The connection mode of the second longitudinal beam 112 and the second transverse beam 111 is adapted to the support body 22, and can be connected by welding or bolt connection if flexible assembly is needed.

[0040] The first cross beam 221 and the second cross beam 111 are arranged at intervals to ensure the bearing strength, reduce redundant materials of the support body 22 and the support frame 11, and realize lightweight design; in addition, the interval distance between the first cross beam 221 and the second cross beam 111 can be adjusted to adapt to battery packs 4 of different sizes, improve the versatility of the assembly, and reduce the modification cost caused by the size change of the battery pack 4.

[0041] In some embodiments, as shown in Figure 3 The end of the column 21 away from the support body 22 is connected with a mounting plate 211, and the mounting plate 211 is adapted to be connected with the first longitudinal beam 222 or the second longitudinal beam 112.

[0042] The mounting plate 211 can be designed as an L-shaped structure including two plate bodies, one plate body serving as a connecting part with bolt holes formed thereon for bolt connection with the first longitudinal beam 222 or the second longitudinal beam 112, and the other plate body serving as a positioning part capable of being fitted with the side wall of the first longitudinal beam 222 or the second longitudinal beam 112. The positioning part can play a role of quick positioning during assembly, limit the shaking of the column 21 in the horizontal direction through the fitting of the positioning part and the surface of the first longitudinal beam 222 or the second longitudinal beam 112, directly determine the connection position of the column 21 and the first longitudinal beam 222 or the second longitudinal beam 112, effectively reduce the positional deviation during installation, and improve the assembly efficiency.

[0043] The mounting plate 211 can increase the contact area between the column 21 and the first longitudinal beam 222 or the second longitudinal beam 112, uniformly disperse the load transmitted by the column 21 to the first longitudinal beam 222 or the second longitudinal beam 112, avoid local stress concentration of the first longitudinal beam 222 or the second longitudinal beam 112, and reduce the deformation risk of the first longitudinal beam 222 or the second longitudinal beam 112.

[0044] In some embodiments, the standard layer frame 2 further includes a first ring beam 23 arranged at the periphery of the support body 22; and the bottom layer frame 1 further includes a second ring beam 12 arranged at the periphery of the support frame 11.

[0045] The first ring beam 23 and the second ring beam 12 can adopt L-shaped profile steel, and convex welding nuts are welded on the L-shaped profile steel for skin installation and fixing of wire harnesses.

[0046] The first ring beam 23 and the second ring beam 12 can provide positions for the installation of the skin and the fixing of the wire harnesses, and the arrangement of the first ring beam 23 and the second ring beam 12 can improve the overall rigidity and torsional performance of the support body 22 and reduce the deformation caused by vibration during vehicle driving.

[0047] In some embodiments, a reinforcing plate 13 is further included, the reinforcing plate 13 comprising a first connecting portion 131 and a second connecting portion 132 arranged at an angle, the first connecting portion 131 being configured to connect with the second longitudinal beam 112, and the second connecting portion 132 being configured to connect with the bracket structure 3.

[0048] The reinforcing plate 13 can be integrally formed by a high-strength steel plate, and the first connecting portion 131 and the second connecting portion 132 arranged at an angle are respectively connected with the bracket structure 3 and the second longitudinal beam 112, thereby avoiding stress concentration caused by a large number of holes directly formed in the bottom of the second longitudinal beam 112, so as to avoid deformation or fracture of the second longitudinal beam 112 when the second longitudinal beam 112 bears the weight of the battery pack 4. Meanwhile, the reinforcing plate 13 can disperse the load transmitted by the bracket structure 3 to a larger area of the second longitudinal beam 112, thereby reducing the local stress of the second longitudinal beam 112.

[0049] In some embodiments, the bracket structure 3 comprises a first connecting surface 31, a second connecting surface 32, and a diagonal brace 33. The first connecting surface 31 is adapted to and detachably connected with the mounting surface 51 of the vehicle frame 5. The second connecting surface 32 is adapted to and detachably connected with the bottom layer frame 1. One end of the diagonal brace 33 is connected with the first connecting surface 31, and the other end of the diagonal brace 33 is connected with the second connecting surface 32, so as to form a triangular support structure among the diagonal brace 33, the first connecting surface 31, and the second connecting surface 32.

[0050] The first connecting surface 31 and the second connecting surface 32 of the bracket structure 3 can adopt a flat plate structure. The shape of the first connecting surface 31 is adapted to the mounting surface 51 of the vehicle frame 5, and a plurality of bolt holes are pre-set on the surface of the first connecting surface 31, so as to realize detachable connection with the vehicle frame 5 through bolts, thereby ensuring stable connection between the bracket and the vehicle frame 5. The second connecting surface 32 is attached to the bottom or side surface of the bottom layer frame 1, and a plurality of bolt holes are also pre-set on the second connecting surface 32, so as to realize detachable connection with the bottom layer frame 1 through bolts, thereby facilitating later maintenance and adjustment. One end of the diagonal brace 33 is fixedly welded to the edge or middle part of the first connecting surface 31, and the other end of the diagonal brace 33 is fixedly welded to the corresponding position of the second connecting surface 32, so as to naturally enclose the diagonal brace 33, the first connecting surface 31, and the second connecting surface 32 to form a stable triangular support structure.

[0051] The triangular support structure formed by the diagonal brace 33, the first connecting surface 31, and the second connecting surface 32 can improve the structural strength of the bracket itself by using the non-deformable property of a triangle.

[0052] In some embodiments, the first connecting surface 31 comprises a supporting sub-surface 311 and a limiting sub-surface 312 arranged at an angle, and the mounting surface 51 comprises a supporting sub-surface 511 and a limiting sub-surface 512. The supporting sub-surface 311 is adapted to the supporting sub-surface 511 to support the load, and the limiting sub-surface 312 is adapted to the limiting sub-surface 512 to limit the assembly displacement.

[0053] The support sub-surface 311 is designed as a plane or a curved surface matching the curvature of the supporting sub-surface 511, and bolt holes are formed on the surface. The supporting sub-surface 511 of the mounting surface 51 of the vehicle frame 5 is fixed by bolts. The vertical load transmitted by the upper assembly is directly borne by the supporting sub-surface 311. The limiting sub-surface 312 extends along the edge of the supporting sub-surface 311 to one side, and the flatness of the limiting sub-surface 312 matches the positioning sub-surface 512 of the vehicle frame 5. The limiting sub-surface 312 is provided with bolt holes, which can be bolted with the positioning sub-surface 512.

[0054] The supporting sub-surface 311 matches the supporting sub-surface 511 to support the load, which can ensure that the weight of the battery box assembly is evenly transmitted to the vehicle frame 5. During installation, the limiting sub-surface 312 and the positioning sub-surface 512 can be quickly positioned and installed without repeated adjustment. At the same time, the limiting sub-surface 312 and the positioning sub-surface 512 can limit the relative displacement between the bracket structure 3 and the vehicle frame 5, such as lateral movement, to avoid loosening of the connection due to vibration during driving.

[0055] In some embodiments, the bracket structure 3 is an integrally cast monolithic structure.

[0056] The integrally cast bracket structure 3 has no spliced welds, and has higher overall strength and fatigue resistance, which can withstand the load of the battery pack 4 for a long time without being easily damaged. The integrally cast design can achieve lightweight design, and the weight of the bracket structure 3 is lighter than that of the welded steel bracket, thereby reducing the overall energy consumption of the vehicle.

[0057] In a second aspect, the application also provides a power device, which comprises a battery box assembly and a battery pack 4 mounted on the battery box assembly. The battery pack 4 is provided with a connecting plate 41 at one end connected to the supporting body 22 and / or the bottom frame 1. The mounting plate 211, the connecting plate 41 and the first longitudinal beam 222 are sequentially inserted through the connecting member. Alternatively, the mounting plate 211, the connecting plate 41 and the second longitudinal beam 112 are sequentially inserted through the connecting member.

[0058] The connecting plate 41 at the bottom of the battery pack 4 can be made of a metal plate, which has a shape matching the contour of the bottom of the battery pack 4 and is fixed as a whole by welding. The connecting plate 41 is provided with through holes corresponding to the positions of the mounting plate 211, the first longitudinal beam 222 (or the second longitudinal beam 112). During assembly, the bolts are sequentially inserted through the bolt holes of the mounting plate 211, the through holes of the connecting plate 41 and the pre-set bolt holes of the first longitudinal beam 222 or the second longitudinal beam 112, forming an insertion and fixing structure.

[0059] The mounting plate 211 can increase the contact area between the battery pack 4 and the first longitudinal beam 222 or the second longitudinal beam 112, and disperse the weight load of the battery pack 4 to the overall contact area of the mounting plate 211, thereby ensuring the load stability of the battery box assembly.

[0060] In a third aspect, the present application further provides a vehicle, comprising: a vehicle body, and a power device electrically connected with the vehicle body.

[0061] The frame 5 of the vehicle body is detachably connected with the power device through the bracket structure 3, and is suitable for commercial vehicles; the number of layers of the standard layer frame 2 can be adjusted according to the endurance requirement, and the frame 5 does not need to be redesigned, thereby reducing the development cost of the vehicle type.

[0062] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.

Claims

1. A battery frame assembly, characterized in that, include: The underlying frame (1) is used to install the battery pack (4). At least one standard layer frame (2) is disposed above the bottom layer frame (1) along the height direction. The standard layer frame (2) includes a support body (22) and a column (21) disposed opposite to the support body (22). The battery pack (4) is adapted to be placed on the support body (22). The column (21) is adapted to be detachably connected to another standard layer frame (2) or the bottom layer frame (1) located below it. Bracket structure (3) is provided at the bottom of the bottom frame (1) and is used to connect the bottom frame (1) and the frame (5).

2. The battery frame assembly according to claim 1, characterized in that, The supporting body (22) includes: The first longitudinal beam (222) is provided at least two of the first longitudinal beams (222) at intervals; The first crossbeam (221) is disposed between two adjacent first longitudinal beams (222), and multiple first crossbeams (221) are disposed at intervals along the extension direction of the first longitudinal beams (222); The first crossbeam (221) and the first longitudinal beam (222) enclose a load-bearing area for mounting the battery pack (4); The underlying frame (1) includes a support frame (11) for mounting the battery pack (4). The support frame (11) includes: The second longitudinal beam (112) is provided at least two of the second longitudinal beams (112) at intervals; The second crossbeam (111) is disposed between two adjacent second longitudinal beams (112), and multiple second crossbeams (111) are spaced apart along the extension direction of the second longitudinal beams (112); The second crossbeam (111) and the second longitudinal beam (112) enclose a load-bearing area for mounting the battery pack (4).

3. The battery frame assembly according to claim 2, characterized in that, The end of the column (21) facing away from the support body (22) is connected to an installation plate (211), which is adapted to be connected to the first longitudinal beam (222) or the second longitudinal beam (112).

4. The battery frame assembly according to claim 2, characterized in that, The standard layer frame (2) also includes a first ring beam (23), which is disposed around the support body (22); The bottom frame (1) further includes a second ring beam (12), which is disposed around the support frame (11).

5. The battery frame assembly according to claim 4, characterized in that, It also includes a reinforcing plate (13), which includes a first connecting part (131) and a second connecting part (132) arranged at an angle. The first connecting part (131) is used to connect with the second longitudinal beam (112), and the second connecting part (132) is used to connect with the bracket structure (3).

6. The battery frame assembly according to claim 1, characterized in that, The bracket structure (3) includes: a first connecting surface (31), which is adapted to and detachably connected to the mounting surface (51) of the frame (5); The second connecting surface (32) is adapted to be detachably connected to the bottom frame (1); A diagonal brace (33) is provided, with one end connected to the first connecting surface (31) and the other end connected to the second connecting surface (32). A triangular support structure is formed between the diagonal brace (33), the first connecting surface (31), and the second connecting surface (32).

7. The battery frame assembly according to claim 6, characterized in that, The first connecting surface (31) includes a supporting sub-surface (311) and a limiting sub-surface (312), wherein the supporting sub-surface (311) and the limiting sub-surface (312) are arranged at an angle; the mounting surface (51) includes a supporting sub-surface (511) and a positioning sub-surface (512), wherein the supporting sub-surface (511) and the supporting sub-surface (311) are adapted to bear the load, and the positioning sub-surface (512) and the limiting sub-surface (312) are fitted together to limit the assembly displacement.

8. The battery frame assembly according to any one of claims 1 to 7, characterized in that, The bracket structure (3) is an integral structure cast in one piece.

9. A power unit, characterized in that, The power unit includes a battery frame assembly as described in any one of claims 1 to 8 and a battery pack (4) mounted on the battery frame assembly. The battery pack (4) is provided with a connecting plate (41) at one end connected to the support body (22) and / or the bottom frame (1). The mounting plate (211) of the column (21), the connecting plate (41) and the first longitudinal beam (222) of the support body (22) are sequentially connected by connectors. And / or, the mounting plate (211) of the column (21), the connecting plate (41) and the second longitudinal beam (112) of the support frame (11) of the bottom frame (1) are sequentially connected by connectors.

10. A vehicle, characterized in that, include: The vehicle body, and the power unit as described in claim 9, which is electrically connected to the vehicle body.

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