Commercial vehicle power battery system mounting structure

Abstract

This invention relates to the field of vehicle engineering technology and provides a loading structure for a commercial vehicle power battery system, including a front frame, a rear frame, a center frame, a battery pack, and a top cover. The front frame, center frame, and rear frame are connected sequentially from front to rear. The center frame includes two longitudinal beams symmetrically arranged in the left-right direction and two crossbeams symmetrically arranged in the front-rear direction. The ends of the crossbeams are fixed to the two longitudinal beams, forming an accommodating space. The battery pack includes a support plate and a battery body. The battery body is placed within the accommodating space. The support plate is fixed to the bottom of the battery body and to the lower end faces of the two longitudinal beams. The top cover is fixed to the upper end faces of the two longitudinal beams. This CTC (Centralized Battery Pack) structure rationally utilizes the unused space between the two longitudinal beams as the accommodating space for the battery pack and also facilitates the disassembly and replacement of the battery pack.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and in particular to a mounting structure for a power battery system in a commercial vehicle. Background Technology

[0002] Currently, some passenger car manufacturers have already applied CTC (cell-to-chassis) technology to their new energy vehicles, and more and more automakers are beginning to deploy CTC technology. The application of CTC technology offers advantages such as reduced vehicle weight, improved chassis torsional stiffness, lightweighting, increased volume utilization, and cost reduction and efficiency improvement. Therefore, CTC battery technology is undoubtedly the future trend in weight management for the new energy vehicle industry. The CTC technology currently used in the new energy passenger vehicle sector integrates the vehicle chassis as a sealed cavity for the battery, resulting in high integration efficiency.

[0003] With so many advantages, CTC technology is gradually being introduced into the commercial vehicle sector to enhance the advantages of new energy commercial vehicles. Furthermore, the ample space between the middle and wheelbase of the commercial vehicle's power battery system mounting structure makes it easier to arrange the CTC configuration, improve space utilization, and save space on both sides of the vehicle frame, thereby increasing the overall vehicle's storage space.

[0004] However, since commercial vehicles do not have the chassis structure of passenger cars, they cannot directly refer to the relatively mature layout of passenger cars. Furthermore, the battery system of the CTC configuration of passenger cars cannot be disassembled or replaced.

[0005] Therefore, there is an urgent need for a mounting structure for commercial vehicle power battery systems to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to propose a loading structure for a commercial vehicle power battery system that can make reasonable use of the idle space between two longitudinal beams as a storage space for the battery pack, which facilitates the disassembly and replacement of the battery pack.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The mounting structure for commercial vehicle power battery systems includes:

[0009] Front frame and rear frame;

[0010] The vehicle frame, the aforementioned front frame, the aforementioned middle frame and the aforementioned rear frame are connected sequentially from front to back. The aforementioned middle frame includes two longitudinal beams symmetrically arranged in the left-right direction and two transverse beams symmetrically arranged in the front-back direction. The two ends of the aforementioned transverse beams are respectively fixed to the two aforementioned longitudinal beams to form an accommodating space.

[0011] The battery pack includes a support plate and a battery body. The battery body is placed in the accommodating space. The support plate is fixed to the bottom of the battery body and to the lower end face of the two longitudinal beams.

[0012] The top cover is fixed to the upper end face of the two longitudinal beams.

[0013] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the upper end faces of the two aforementioned longitudinal beams are respectively provided with a first flange structure that bends to the left and / or right, and the aforementioned first flange structures located on the two aforementioned longitudinal beams are located on the same horizontal plane, and the upper end face of the aforementioned first flange structure is fixed to the lower end face of the aforementioned upper cover.

[0014] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the lower end faces of the two aforementioned longitudinal beams are respectively provided with second flange structures that bend toward the inner side of the aforementioned accommodating space, and the aforementioned second flange structures located on the two aforementioned longitudinal beams are located on the same horizontal plane.

[0015] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the lower end faces of the two aforementioned longitudinal beams are respectively provided with a third flange structure that bends outward toward the aforementioned accommodating space, and the aforementioned third flange structures located on the two aforementioned longitudinal beams are located on the same horizontal plane. The bolt fastener passes through the aforementioned support plate of the aforementioned battery pack and the aforementioned third flange structure and is threadedly connected to the nut.

[0016] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the aforementioned longitudinal beam is provided with a front connecting part, a middle section and a rear connecting part in sequence along its length direction. The aforementioned middle section and the aforementioned cross beam enclose the aforementioned accommodating space. The aforementioned front connecting part is connected to the aforementioned front frame, and the aforementioned rear connecting part is connected to the aforementioned rear frame. In the aforementioned left and right directions, the distance between the two aforementioned front connecting parts and the distance between the two aforementioned rear connecting parts are both smaller than the distance between the two aforementioned middle sections.

[0017] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the middle section and the front connecting part, as well as the middle section and the rear connecting part, are connected by a connecting part, and the connecting part and the middle section, the front connecting part and the rear connecting part are all provided with a rounded chamfer, the axis of the chamfer being parallel to the vertical direction.

[0018] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, a folded edge structure is provided in the middle section inside the aforementioned accommodating space, and the two aforementioned folded edge structures are respectively connected to the aforementioned middle section and the aforementioned front connecting part and the aforementioned middle section and the aforementioned rear connecting part.

[0019] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, in the aforementioned left-right direction, the distance between the two aforementioned folded edge structures is smaller than the distance between the two front connecting parts and also smaller than the distance between the two aforementioned rear connecting parts. The battery pack also includes two second end plates spaced apart in the aforementioned front-rear direction. The second end plates are both perpendicular to the aforementioned support plate. In the aforementioned front-rear direction, the end faces of the two aforementioned second end plates on opposite sides abut against the end faces of the adjacent sides of the aforementioned folded edge structures, and one side of the aforementioned second end plate abuts against the two aforementioned folded edge structures symmetrical in the aforementioned left-right direction.

[0020] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, the aforementioned top cover is provided with two first end plates in the aforementioned front-rear direction, and in the aforementioned left-right direction, the length of the aforementioned first end plates is equal to the distance between the two aforementioned folded edge structures. In the aforementioned front-rear direction, the distance between the two aforementioned first end plates is the same as the distance between the two aforementioned folded edge structures, and the aforementioned first end plates are inserted between the two aforementioned folded edge structures.

[0021] As a preferred technical solution for the loading structure of the aforementioned commercial vehicle power battery system, in the aforementioned front-rear direction, the two ends of the aforementioned support plate are respectively provided with a first sealing part, and the two ends of the aforementioned upper cover are respectively provided with a second sealing part. The aforementioned first sealing part and the aforementioned second sealing part abut against and seal the two end faces of the aforementioned folded edge structure in the aforementioned vertical direction.

[0022] Beneficial effects of this invention:

[0023] The commercial vehicle frame is divided into a front frame, a middle frame, and a rear frame. A segmented frame is used instead of the traditional side beam frame, which improves the torsional rigidity of the entire vehicle. Two longitudinal beams and two transverse beams enclose a space for loading batteries. The bottom wall of the battery body is fixed to the upper surface of the support plate, and the battery body is located in the space. The left and right edges of the upper surface of the support plate are fixed to the lower surfaces of the longitudinal beams on both sides to form the bottom wall of the space. The two edges of the lower surface of the cover are fixed to the upper surfaces of the two longitudinal beams to form the top wall of the space. In this way, the middle part of the middle frame of the vehicle is used as the installation area for the battery pack, making reasonable use of the idle space between the two longitudinal beams and increasing the space for placing batteries. During installation, the battery pack is lifted upwards from the bottom of the frame, and the battery body is placed into the accommodating space. The upper end face of the support plate abuts against and is fixed to the lower end face of the longitudinal beam. The top cover is fastened to the upper end face of the longitudinal beam from top to bottom and fixed to the accommodating space. Thus, when the battery in the accommodating space is inspected or replaced, it is only necessary to remove the bolts and fasteners from the bottom of the frame to allow the battery pack to be removed from the accommodating space. The structure is simple and the operation is convenient. Compared with the traditional CTC configuration, the CTC configuration of this invention is more conducive to the maintenance and replacement of the battery pack without damaging its inherent structure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the loading structure of the commercial vehicle power battery system provided in an embodiment of the present invention;

[0026] Figure 2 This is an exploded view of the loading structure of the commercial vehicle power battery system provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the midframe provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the longitudinal beam provided in an embodiment of the present invention. Figure 1 ;

[0029] Figure 5 This is a schematic diagram of the longitudinal beam provided in an embodiment of the present invention. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the longitudinal beam provided in an embodiment of the present invention. Figure 3 ;

[0031] Figure 7 This is a schematic diagram of the structure of the top cover provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention. Figure 1 ;

[0033] Figure 9 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention. Figure 2 ;

[0034] Figure 10 This is a schematic diagram of the assembly relationship between the second end plate and the folded edge structure provided in an embodiment of the present invention.

[0035] In the picture:

[0036] 100. Mid-frame;

[0037] 110. Longitudinal beam; 111. First flange structure; 112. Second flange structure; 113. Third flange structure; 114. Front connecting part; 115. Middle section; 116. Rear connecting part; 117. Connecting part; 118. Folded edge structure; 119. Bolt fastener;

[0038] 120. Crossbeam; 130. Accommodation space;

[0039] 200. Battery pack; 210. Support plate; 211. First sealing part; 220. Battery body; 230. Second end plate; 231. Electrical connector;

[0040] 300. Top cover; 310. First end plate; 320. Top cover body; 330. Protruding structure; 340. Second sealing part. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0042] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0045] like Figures 1 to 10 As shown, this application provides a loading structure for a commercial vehicle power battery system, including a front frame, a rear frame, a mid-frame 100, a battery pack 200, and a top cover 300. The front frame is used to mount the cab and steering wheels, and the rear frame is used to mount the drive wheels. The front frame, mid-frame 100, and rear frame are connected sequentially from front to back. The mid-frame 100 includes two longitudinal beams 110 symmetrically arranged in the left-right direction and two crossbeams 120 symmetrically arranged in the front-rear direction. The two ends of the crossbeams 120 are fixed to the two longitudinal beams 110 respectively, forming an accommodating space 130. The battery pack 200 includes a support plate 210 and a battery body 220. The battery body 220 is placed within the accommodating space 130. The support plate 210 is fixed to the bottom of the battery body 220 and to the lower end faces of the two longitudinal beams 110. The top cover 300 is fixed to the upper end faces of the two longitudinal beams 110.

[0046] In this configuration, the commercial vehicle frame is divided into a front frame, a middle frame 100, and a rear frame. A segmented frame is used instead of the traditional side beam frame. Two longitudinal beams 110 and two transverse beams 120 form a accommodating space 130 for mounting the battery body 220. The bottom wall of the battery body 220 is fixed to the upper surface of the support plate 210. The battery body 220 is located within the accommodating space 130. The left and right edges of the upper surface of the support plate 210 are fixed to the lower surfaces of the longitudinal beams 110 on both sides to form the bottom wall of the accommodating space 130. The two edges of the lower surface of the cover 300 are fixed to the upper surfaces of the two longitudinal beams 110 to form the top wall of the accommodating space 130. In this way, the middle part of the middle frame 100 of the vehicle frame is used as the installation area for the battery pack 200, making reasonable use of the idle space between the two longitudinal beams 110 and increasing the space for placing the battery body 220.

[0047] Furthermore, during installation, the battery pack 200 is lifted upwards from the bottom of the mid-frame 100, and the battery body 220 is placed into the accommodating space 130. The upper end face of the support plate 210 abuts against and is fixed to the lower end face of the longitudinal beam 110. The upper cover 300 is fastened to the upper end face of the longitudinal beam 110 from top to bottom above the accommodating space 130 and fixed. Thus, when the battery body 220 in the accommodating space 130 is inspected or replaced, it is only necessary to remove the bolt fasteners 119 from the bottom of the mid-frame 100 to allow the battery pack 200 to be removed from the accommodating space 130. The structure is simple and the operation is convenient.

[0048] Specifically, the support plate 210 and the longitudinal beam 110 are connected by multiple bolts 119. The bolts 119 pass through the support plate 210 vertically and are threaded to the longitudinal beam 110. The multiple bolts 119 are spaced apart and evenly distributed along the length of the longitudinal beam 110. This makes the force of the battery pack 200 on the longitudinal beam 110 more uniform, avoiding localized stress concentration and deformation. This installation method also allows the longitudinal beam 110 to bear more weight of the battery body 220, thereby increasing the number of battery bodies 220 that can be loaded in the battery pack 200.

[0049] Optionally, the upper end faces of the two longitudinal beams 110 are respectively provided with first flange structures 111 that bend to the left and / or right, and the first flange structures 111 of the two longitudinal beams 110 are located on the same horizontal plane, with the upper end face of the first flange structure 111 fixed to the lower end face of the cover 300. This arrangement provides support and a fixed position for the cover 300, avoiding the need for excessive holes in the main body of the longitudinal beams 110, which would reduce the structural strength of the longitudinal beams 110. Furthermore, the first flange structure 111 also serves as a reinforcing structural component of the longitudinal beams 110.

[0050] Optionally, the lower end faces of the two longitudinal beams 110 are respectively provided with second flange structures 112 that bend inward toward the accommodating space 130, and the second flange structures 112 of the two longitudinal beams 110 are located on the same horizontal plane. With this configuration, the second flange structure 112 serves as a reinforcing structural member of the longitudinal beams 110, thereby enhancing their structural strength.

[0051] Optionally, the lower end faces of the two longitudinal beams 110 are each provided with a third flange structure 113 that bends outward toward the accommodating space 130. The third flange structures 113 on the two longitudinal beams 110 are located on the same horizontal plane. Bolts and fasteners 119 pass through the support plate 210 of the battery pack 200 and the third flange structure 113, and are then threadedly connected to a nut. With this configuration, the third flange structure 113 provides an installation position for the battery pack 200, and also serves as a reinforcing structural member for the longitudinal beams 110.

[0052] Optionally, the longitudinal beam 110 is provided with a front connecting part 114, a middle section 115, and a rear connecting part 116 along its length. The middle section 115 and the crossbeam 120 enclose a receiving space 130. The front connecting part 114 is connected to the front frame, and the rear connecting part 116 is connected to the rear frame. In the left-right direction, the distance between the two front connecting parts 114 and the distance between the two rear connecting parts 116 are both smaller than the distance between the two middle sections 115. Specifically, the distance between the two front connecting parts 114 is adapted to the width of the front frame, and the distance between the two rear connecting parts 116 is adapted to the width of the rear frame to ensure the assembly and fixation of the middle frame 100 with the front frame and the rear frame. The distance between the two middle sections 115 in the middle frame 100 is relatively large to expand the volume of the receiving space 130 in the width direction, so that it can accommodate more battery bodies 220, or adapt to battery bodies 220 of different models, shapes, or sizes.

[0053] Optionally, the middle section 115 is connected to the front connecting part 114 and to the rear connecting part 116 via a connecting part 117. The connecting part 117 has a rounded chamfer at each connection point with the middle section 115, the front connecting part 114, and the rear connecting part 116, with the axis of the chamfer parallel to the vertical direction. Thus, by using the connecting part 117 as a transition section between the middle section 115 and the front connecting part 114, and between the middle section 115 and the rear connecting part 116, the rounded chamfer allows for a smooth connection between the three parts and also solves the problem of stress concentration at the connection points.

[0054] Furthermore, in the vertical direction, the length of the middle section 115 of the longitudinal beam 110 is greater than the length of the front connecting part 114 and greater than the length of the rear connecting part 116, thus expanding the volume of the accommodating space 130 in the vertical direction, enabling it to install more battery bodies 220.

[0055] Furthermore, in the vertical direction, the upper and lower end faces of the connecting part 117 are also provided with rounded chamfers to connect the upper and lower end faces of the middle section 115 with the front connecting part 114 and the upper and lower end faces of the middle section 115 with the rear connecting part 116, which have a height difference.

[0056] Optionally, on the inner side of the accommodating space 130, the middle section 115 is provided with a folded edge structure 118, and the two folded edge structures 118 are respectively connected to the front connecting part 114 and the rear connecting part 116. In this way, the folded edge structure 118 serves as a structural reinforcement connecting the middle section 115 and the front connecting part 114, as well as the middle section 115 and the rear connecting part 116.

[0057] Furthermore, both the upper and lower end faces of the front connecting part 114 and the rear connecting part 116 are provided with flanges that bend inward toward the center frame 100, and the flange structure 118 is fixedly connected to the flanges to increase the strength of the flange structure 118.

[0058] Optionally, in the left-right direction, the distance between the two folded edge structures 118 is smaller than the distance between the two front connecting parts 114 and smaller than the distance between the two rear connecting parts 116. The battery pack 200 also includes two second end plates 230 spaced apart in the front-back direction. The second end plates 230 are perpendicular to the support plate 210 and are inserted into the accommodating space 130. In the front-back direction, the end faces of the two second end plates 230 on opposite sides abut against the end faces of the adjacent sides of the folded edge structures 118, and one side of the second end plate 230 abuts against the two folded edge structures 118 symmetrical in the left-right direction.

[0059] Specifically, in the left-right direction, the length of the second end plate 230 is less than the length of the support plate 210, greater than the distance between the two folded edge structures 118, and less than or equal to the distance between the two middle sections 115. The second end plate 230 is centrally located on the support plate 210, with areas on both sides of the support plate 210 for connection with the longitudinal beam 110. In the front-back direction, the distance between the two second end plates 230 is the same as the distance between the two folded edge structures 118. Thus, when installing the battery pack 200, the two second end plates 230 can be inserted into the receiving space 130 respectively, and abut against the opposite end faces of the two folded edge structures 118 on the corresponding sides in the front-back direction. The two sides of the support plate 210 can also be fixed to the longitudinal beam 110.

[0060] Specifically, in the front-to-back direction, the opposite end faces of the two folded structures 118 form an abutment plane, and a reinforcing rib is provided between the abutment plane and the middle section 115. The second end plate 230 can fit against the abutment plane to achieve a seal of the accommodating space 130.

[0061] Furthermore, an electrical connector 231 is provided on the second end plate 230 for connecting other electrical components in the vehicle. In the vertical direction, the electrical connector 231 and the crossbeam 120 are located on different horizontal planes, thus avoiding interference from the crossbeam 120 to the plugging and unplugging of the electrical connector 231.

[0062] Optionally, the top cover 300 is provided with two first end plates 310 in the front-back direction. In the left-right direction, the length of the first end plate 310 is equal to the distance between the two folded structures 118 and less than or equal to the distance between the two middle sections 115. In the front-back direction, the first end plates 310 are inserted into the accommodating space 130, and the end faces of the opposite sides of the two first end plates 310 abut against the end faces of the adjacent sides of the two second end plates 230.

[0063] Specifically, the upper cover 300 includes an upper cover body 320 and two first end plates 310. The first end plates 310 are perpendicular to the upper cover body 320. In the left-right direction, the length of the first end plate 310 is less than the length of the upper cover body 320, and equal to the distance between the two folded edge structures 118. The first end plates 310 are centrally located in the upper cover body 320, and areas for connection with the longitudinal beams 110 are left on both sides of the upper cover body 320. In the front-back direction, the distance between the two first end plates 310 is the same as the distance between the two folded edge structures 118, and the first end plates 310 are inserted between the two folded edge structures 118. Thus, when the top cover 300 is installed, the two first end plates 310 can be inserted into the accommodating space respectively and abut against the second end plate 230 on the corresponding side. In the frontal projection in the front-back direction, the folded edge structure 118 and the second end plate 230 at least partially overlap in the left-right direction, and the first end plate 310 and the second end plate 230 at least partially overlap in the vertical direction.

[0064] Optionally, in the front-back direction, the support plate 210 is provided with a first sealing part 211 at both ends, and the upper cover 300 is provided with a second sealing part 340 at both ends. The first sealing part 211 and the second sealing part 340 abut against and seal the two end faces of the vertical folded edge structure 118.

[0065] Optionally, both the front connecting part 114 and the rear connecting part 116 are provided with through holes arranged in a matrix so that they can be fixed to the front frame or the rear frame by bolt fasteners 119.

[0066] Optionally, the crossbeam 120 is a U-shaped structural component. Along the front-to-back direction, one crossbeam 120 is located between the front connecting part 114 and the folded structure 118, and the other crossbeam 120 is located between the rear connecting part 116 and the folded structure 118. In the vertical direction, the crossbeam 120 is located between the first folded structure 111 and the second folded structure 112. Specifically, the crossbeam 120 is fixed to the connecting part 117.

[0067] Optionally, the upper surface of the cover 300 is provided with a protruding structure 330, and the protruding structure 330 is symmetrical in both the front-back direction and the left-right direction, in order to enhance the strength of the cover 300.

[0068] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A commercial vehicle traction battery system loading structure, characterized by, The utility model relates to a battery pack and a vehicle comprising the same, and more particularly to a battery pack and a vehicle comprising the same. The battery pack comprises a support plate and a battery body, the battery body is placed in the accommodating space, the support plate is fixed with the bottom of the battery body, and the support plate is fixed with the lower side end surface of the two longitudinal beams. The upper cover is fixed with the upper side end surface of the two longitudinal beams. The longitudinal beam is sequentially provided with a front connecting part, a middle section and a rear connecting part along the length direction of the longitudinal beam, the middle section and the transverse beam enclose the accommodating space, the front connecting part is connected with the front frame, the rear connecting part is connected with the rear frame, and the interval between the two front connecting parts and the interval between the two rear connecting parts are both smaller than the interval between the two middle sections in the left-right direction. The middle section and the front connecting part and the middle section and the rear connecting part are connected through a connecting part, and the connecting position of the connecting part and the middle section, the front connecting part and the rear connecting part is provided with a circular arc chamfer, and the axis of the chamfer is parallel to the vertical direction. The middle section is provided with a folded edge structure on the inner side of the accommodating space, and the two folded edge structures are respectively connected with the middle section and the front connecting part and the middle section and the rear connecting part. The interval between the two folded edge structures is smaller than the interval between the two front connecting parts and the interval between the two rear connecting parts in the left-right direction, the battery pack further comprises two second end plates which are spaced apart in the front-rear direction, the second end plates are both perpendicular to the support plate, the second end plates are inserted into the accommodating space, the end surface of the two second end plates on the opposite side is respectively abutted with the adjacent side end surface of the folded edge structure in the front-rear direction, and the second end plate on one side is simultaneously abutted with the two folded edge structures which are symmetrical in the left-right direction. ​ ​ The upper cover (300) is provided with two first end plates (310) in the front-rear direction, and the length of the first end plate (310) in the left-right direction is equal to the interval between the two folding edge structures (118). The interval between the two first end plates (310) in the front-rear direction is the same as the interval between the two folding edge structures (118), and the first end plate (310) is inserted between the two folding edge structures (118).

2. The commercial vehicle traction battery system loading structure of Claim 1, characterized by, The upper side end surface of the two longitudinal beams (110) is respectively provided with a first flange structure (111) bent to the left and / or right direction, and the first flange structure (111) of the two longitudinal beams (110) is located on the same horizontal plane. The upper end surface of the first flange structure (111) is fixed to the lower end surface of the upper cover (300).

3. The commercial vehicle traction battery system loading structure of Claim 1, characterized by, The lower side end surface of the two longitudinal beams (110) is respectively provided with a second flange structure (112) bent to the inside of the accommodation space (130), and the second flange structure (112) of the two longitudinal beams (110) is located on the same horizontal plane.

4. The commercial vehicle traction battery system loading structure of Claim 1, characterized in that, The lower side end surface of the two longitudinal beams (110) is respectively provided with a third flange structure (113) bent to the outside of the accommodation space (130), and the third flange structure (113) of the two longitudinal beams (110) is located on the same horizontal plane. The bolt fastener (119) passes through the support plate (210) of the battery pack (200) and is threadedly connected with a nut after the third flange structure (113).

5. The commercial vehicle traction battery system loading structure of Claim 1, characterized in that, In the front-rear direction, the two ends of the support plate (210) are respectively provided with a first sealing portion (211), and the two ends of the upper cover (300) are respectively provided with a second sealing portion (340). The first sealing portion (211) and the second sealing portion (340) abut and seal the two side end surfaces of the folding edge structure (118) in the vertical direction.

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