CN218877396U

CN218877396U - Threshold roof beam, lower automobile body and electric vehicle of vehicle

Info

Publication number: CN218877396U
Application number: CN202222421615.4U
Authority: CN
Inventors: 李�昊; 徐超; 郭军; 杨小亮
Original assignee: Beijing Chehejia Automobile Technology Co Ltd
Current assignee: Beijing Chehejia Automobile Technology Co Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-04-18
Anticipated expiration: 2032-09-13

Abstract

The embodiment of the utility model discloses a lower automobile body and electric vehicle of threshold roof beam of vehicle and threshold roof beam that has this vehicle. The doorsill beam comprises a connecting part and a protection part. The connecting part is used for connecting a seat beam, the protecting part is connected with the connecting part, the protecting part is arranged along a first side surface and a second side surface which are opposite to each other in a first preset direction, and the second side surface is obliquely arranged relative to the first preset direction; or, the second side surface is provided as a curved surface protruding toward the first side surface. Therefore, the utility model discloses threshold roof beam of vehicle has the advantage that reduces the battery package and takes place the risk of thermal runaway.

Description

Threshold roof beam, lower automobile body and electric vehicle of vehicle

Technical Field

The utility model relates to a power battery technical field, concretely relates to threshold roof beam of vehicle and have lower automobile body and electric vehicle of threshold roof beam of this vehicle.

Background

The battery package is arranged between two threshold roof beams and below the seat crossbeam, and in order to improve the continuation of the journey mileage of electric motor car, the width of battery package can increase the distance between compression battery package and the threshold roof beam. In the correlation technique, the lateral part of threshold roof beam receives the extrusion back, and the threshold roof beam can be with partial atress direct transmission for the battery package, easily causes the battery package to warp the risk of even taking place thermal runaway.

Disclosure of Invention

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the embodiment of the utility model provides a threshold roof beam of vehicle. The threshold beam of the vehicle has the advantage of reducing the risk of thermal runaway of a battery pack matched with the threshold beam.

The embodiment of the utility model provides a lower automobile body is still provided.

The embodiment of the utility model provides an electric vehicle is still provided.

The utility model discloses threshold roof beam of vehicle includes connecting portion and guard portion.

The connecting portion are used for connecting a seat crossbeam, the protection portion with the connecting portion link to each other, the protection portion has relative first side and second side along first direction of predetermineeing, the second side sets up for first direction slope of predetermineeing, perhaps the second side sets up to the orientation the convex curved surface of first side.

Specifically, for example, the protector portion is provided at the lower end of the connecting portion, the second side face of which is directed toward the outside of the vehicle body in the width direction of the vehicle body, directly acts on the second side face upon collision, and presses the battery pack through the first side face.

The utility model discloses threshold roof beam of vehicle sets up through the slope of the second side at the guard portion, the second side sets up to the orientation the convex curved surface of first side. The impact on the first side and the battery pack can be reduced. Therefore, when the second side of the protection part is impacted by the side part, the transmission of the impact force in the first preset direction can be reduced, and the protection of the battery pack is further improved. Therefore, the battery pack matched with the threshold beam has the advantage of reducing the risk of thermal runaway of the battery pack.

Therefore, the utility model discloses threshold roof beam of vehicle has the advantage that has reduced the risk that the battery package takes place thermal runaway.

In some embodiments, the connecting portion has a first energy absorbing chamber.

In some embodiments, the shield has a second energy-absorbing cavity.

In some embodiments, the connecting portion has a first energy-absorbing chamber and the shield portion has a second energy-absorbing chamber, the first and second energy-absorbing chambers being separated by a transverse rib.

In some embodiments, a longitudinal rib is arranged in the first energy absorption cavity so as to divide the first energy absorption cavity into a plurality of energy absorption sub-cavities, and the longitudinal rib is connected with the wall surface of the first energy absorption cavity.

In some embodiments, the connecting portion and the protecting portion are sequentially arranged along a second predetermined direction, the cross-sectional area of the protecting portion decreases towards a side away from the connecting portion along the second predetermined direction, and the first predetermined direction is perpendicular to the second predetermined direction.

In some embodiments, the second side surface is at an angle of 45 ° to 60 ° with respect to the first predetermined direction.

In some embodiments, the rocker beam of the vehicle further includes a bead portion extending in the second predetermined direction for shielding a floor panel of a battery pack, and the bead portion is connected to the shielding portion.

In some embodiments, the length of the guard portion along the first predetermined direction is 110mm to 135mm.

The lower car body of the embodiment of the utility model provides a can include any one of the above-mentioned embodiments the threshold roof beam of vehicle. The lower car body comprises a cross beam, a first threshold beam and a second threshold beam.

First threshold roof beam with second threshold roof beam is followed first predetermined direction is set up apart from the ground, first threshold roof beam with at least one of second threshold roof beam is according to foretell threshold roof beam, the one end of crossbeam with first threshold roof beam links to each other, the other end of crossbeam with second threshold roof beam links to each other, first threshold roof beam, second threshold roof beam with the crossbeam is injectd and is used for placing the chamber that holds of battery package, the second side sets up first predetermined direction is kept away from hold one side of chamber.

The utility model discloses electric vehicle can include battery package and above-mentioned any one embodiment lower automobile body, the battery package sets up hold the intracavity.

The utility model discloses electric vehicle includes the battery package and according to foretell lower automobile body, this battery package sets up and is holding the intracavity. Therefore, the utility model discloses electric vehicle has the advantage that reduces and this lower automobile body matched with battery package takes place the risk of thermal runaway.

Drawings

Fig. 1 is a matching view of a lower vehicle body and a battery pack according to an embodiment of the present invention.

Fig. 2 is another matching view of the lower body and the battery pack according to the embodiment of the present invention.

Fig. 3 is a schematic view of the sill beam and cross beam according to an embodiment of the present invention.

Fig. 4 is a perspective view of the structure of the sill beam and cross member of an embodiment of the present invention.

Fig. 5 is an exploded view of the structure of the sill beam and cross-beam of an embodiment of the present invention.

Reference numerals:

a lower body 1000; a battery pack 2000;

a sill beam 100; a first threshold beam 101; a second rocker beam 102; a cross member 200; a housing chamber 300;

a connecting part 1; a first energy-absorbing chamber 11; an energy-absorbing subchamber 111; longitudinal ribs 112;

a guard section 2; a first side 21; a second side 22; a second energy-absorbing chamber 23;

a transverse rib 3;

along the edge portion 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

A rocker beam 100 of a vehicle according to an embodiment of the present invention will be described below with reference to fig. 1 to 5.

The utility model discloses threshold roof beam 100 of vehicle includes connecting portion 1 and guard portion 2.

The connecting portion 1 is used for connecting a seat cross member, the protecting portion 2 is connected to the connecting portion 1, the protecting portion 2 has a first side surface 21 and a second side surface 22 opposite to each other in a first predetermined direction (for example, a left-right direction shown in fig. 1), the second side surface 22 is arranged obliquely with respect to the first predetermined direction, and the second side surface 22 has a curved surface protruding toward the first side surface 21 so as to reduce an impact on the first side surface 21.

Specifically, for example, as shown in fig. 1, the protection part 2 is disposed at the lower end of the connection part 1, and the first side surface 21 is perpendicular to the first preset direction. The second side surface 22 faces the outer side of the vehicle body along the width direction of the vehicle body, when the vehicle body is collided by a side part, acting force acting on the connecting part 1 can be transmitted to the second side surface 22 of the protective part 2, the battery pack 2000 is extruded through the first side surface 21, the second side surface 22 can weaken the impact force, and then the battery pack 2000 is correspondingly protected.

The utility model discloses threshold roof beam 100 of vehicle through the reduction structure (slope setting and curved surface setting) that second side 22 at protection part 2 set up, when threshold roof beam 100 received the lateral part striking, can reduce this impact and at the first transmission of predetermineeing the direction, has reduced the impact of lateral part collision to first side 21 and battery package 2000, and then has promoted the protection to battery package 2000. This has the advantage of reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

Therefore, the rocker beam 100 of the vehicle of the embodiment of the present invention has an advantage of reducing the risk of thermal runaway occurring in the battery pack 2000.

As shown in fig. 1 and 3, the second side surface 22 is disposed obliquely with respect to the first predetermined direction. It is understood that the end of the second side surface 22 away from the connecting portion 1 may be inclined toward the direction of having the battery pack or away from the battery pack.

The utility model discloses threshold roof beam 100 of vehicle through with second side 22 for first direction slope setting of predetermineeing, can with the second side 22 bear along the first decomposition of predetermineeing the effort going on of direction (the transmission of weakening impact force along first predetermined direction), make to be used in the first effect component that predetermines the direction and significantly reduce. This has the advantage of reducing the risk of thermal runaway of the battery pack 2000 with which the rocker beam 100 is fitted.

Specifically, the lower end of the second side 22 may be inclined toward the direction close to the battery pack. The present application is not limited thereto, and the lower end of the second side 22 may be inclined in a direction away from the battery pack.

In other embodiments, the second side 22 has a curved surface that is convex toward the first side 21.

The utility model discloses threshold roof beam 100 of vehicle through setting up second side 22 as the curved surface, can increase the area of second side 22. When the second side surface 22 is squeezed, the second side surface 22 is deformed along the bending direction of the second side surface 22, so that the deformation and energy absorption effects are achieved, and the curved second side surface 22 has good bending resistance and stability. Therefore, the utility model discloses threshold roof beam 100 of vehicle has promoted the anti extrusion ability of this guard portion 2 and whole crashproof energy-absorbing effect. This has the advantage of further reducing the risk of thermal runaway of the battery pack 2000 with which the rocker beam 100 is fitted.

As shown in fig. 1 and 2, the interior of the connecting portion 1 has a first suction chamber 11.

The utility model discloses threshold roof beam 100 of vehicle through the inside at connecting portion 1 sets up first energy-absorbing chamber 11, can receive the side direction striking when the vehicle, through the most striking energy of first energy-absorbing chamber 11 absorption, both can protect the security of the passenger in passenger cabin and the passenger cabin effectively, can protect battery package 2000 to avoid the extrusion of lateral part again to a certain extent to reduce and transmit the extrusion force to on the guard portion 2. Therefore, the threshold beam 100 of the vehicle of the embodiment of the present invention has the advantages of low risk of thermal runaway and high riding safety.

As shown in fig. 1 and 3, the shield 2 has a second energy-absorbing chamber 23.

The utility model discloses threshold roof beam 100 of vehicle through setting up second energy-absorbing chamber 23 at protection part 2, can rely on second energy-absorbing chamber 23 to absorb partial impact energy when the vehicle receives the side direction striking, has effectively avoided battery package 2000 to take place the extruded risk of lateral part. This has the advantage of further reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

As shown in fig. 1 and 3, the connecting portion 1 has a first energy absorption cavity 11, the shield portion 2 has a second energy absorption cavity 23, and the first energy absorption cavity 11 and the second energy absorption cavity 23 are separated by a transverse rib 3. The utility model discloses threshold roof beam 100 of vehicle through set up horizontal muscle 3 between first energy-absorbing chamber 11 and second energy-absorbing chamber 23, can receive the side direction striking when the vehicle, and horizontal muscle 3 bears the effort of the first predetermined direction of a part, has promoted this threshold roof beam 100's overall structure intensity. This has the advantage of further reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

Specifically, for example, as shown in FIG. 1, the first energy-absorbing chamber 11 is disposed above the second energy-absorbing chamber 23.

As shown in fig. 1 and 3, a longitudinal rib 112 is provided inside the first energy-absorbing chamber 11 so as to divide the first energy-absorbing chamber 11 into a plurality of energy-absorbing sub-chambers 111, and the longitudinal rib 112 is connected to a wall surface of the first energy-absorbing chamber 11.

The utility model discloses threshold roof beam 100 of vehicle through setting up the muscle 112 of indulging in first energy absorption chamber 11, can promote connecting portion 1's structural strength.

Optionally, a plurality of energy absorbing subchambers 111 are provided spaced apart in the first predetermined direction within the first energy absorbing chamber 11. The utility model discloses threshold roof beam 100 of vehicle realizes the effect of the continuous energy-absorbing of a plurality of cavitys, and makes the first predetermined direction distribution of a plurality of energy-absorbing cavitys, has promoted the energy-absorbing effect. This has the advantage of further reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

Further, there may be a plurality of longitudinal ribs 112, and a plurality of longitudinal ribs 112 may be disposed in parallel, and each longitudinal rib may be perpendicular to the first preset direction; the longitudinal ribs may also be arranged obliquely with respect to the first predetermined direction. A plurality of longitudinal ribs 112 may also be arranged crosswise.

As shown in fig. 1 and 3, the connecting portion 1 and the shielding portion 2 are sequentially arranged along a second predetermined direction, and the cross-sectional area of the shielding portion 2 decreases toward a side away from the connecting portion 1 along the second predetermined direction (e.g., an up-down direction shown in fig. 1), and the first predetermined direction is arranged perpendicular to the second predetermined direction.

The utility model discloses threshold roof beam 100 of vehicle, the cross-sectional area through protection part 2 is predetermine the direction along the second and is reduced towards one side of keeping away from connecting portion 1, can reduce threshold roof beam 100's weight on the basis of guaranteeing 2 structural strength of protection part.

Specifically, the connecting portion 1 is generally provided at an upper portion of the shield portion 2. It will be appreciated that in this connection, the battery pack is located in the lower portion of the vehicle compartment. Not only the battery pack is prevented from occupying the space in the carriage, but also the safety in the carriage is improved. However, the embodiment of the present invention is not limited to this, and the connecting portion 1 may be disposed at the lower portion of the protecting portion 2.

Specifically, as shown in fig. 1 and 3, the cross-sectional area of the shield part 2 in the horizontal direction decreases in the direction from top to bottom, and the width of the upper end surface of the shield part 2 is larger than the width of the lower end surface of the shield part 2.

Alternatively, the shield portion 2 has a triangular or trapezoidal cross section in the vertical direction. For example, as shown in fig. 1 and 3, the shield portion 2 has a trapezoidal cross section.

Alternatively, for example, as shown in figures 1 and 3, the cross-sectional area of the second energy-absorbing chamber 23 decreases in a second predetermined direction towards the side remote from the connection 1.

The second side surface 22 forms an angle of 45-60 degrees with the first predetermined direction. It will be understood that the included angle is an acute angle formed between the second side surface 22 and the first predetermined direction. For example, the second side surface 22 may be at an angle of 45 °, 50 °, 55 ° or 60 ° to the first predetermined direction.

The utility model discloses threshold roof beam 100 of vehicle through with second side 22 with the contained angle of first predetermined direction be 45-60, both can play great structural strength and energy-absorbing effect, has again and subtracts heavy effect advantage.

Optionally, when the thickness direction of the transverse rib 3 is perpendicular to the first preset direction, the included angle between the transverse rib 3 and the second side surface 22 is 45 ° to 60 °.

As shown in fig. 1 and 3, the rocker 100 further includes a bead 4, the bead 4 being perpendicular to the first predetermined direction for shielding a bottom plate of the battery pack 2000, the bead 4 being connected to the shielding part 2. It will be understood that one end of the edge portion 4 is connected to the side of the protective portion 2 away from the connecting portion 1 along the second predetermined direction, and the other end of the edge portion 4 extends towards the side away from the connecting portion 1 along the second predetermined direction.

The utility model discloses threshold roof beam 100 of vehicle can play certain guard action to 2000's bottom plate of battery package through setting up along 4 protections of limit portion. This has the advantage of further reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

Specifically, for example, as shown in fig. 1, the upper end of the edge portion 4 is connected to a region of the lower end of the protector 2 near the second side surface 22, and extends in the up-down direction along the edge portion 4.

In some embodiments, the upper end of the rim portion 4 may also be connected to an area of the second side 22 near the lower end of the shield portion 2. The location along the edge 4 is typically set by the location and size of the bottom panel of the battery pack.

Alternatively, the edge portion 4 and the protection portion 2 may be fixed by welding or integrally molding.

The length of the protection part 2 along the first preset direction is 110mm-135mm.

Threshold roof beam 100 is to seat crossbeam 200 and battery package 2000 pass power route design, and at first threshold roof beam 100 contacts the extrusion post at first, receives and comes from the extruded whole collision force of side, and two horizontal muscle of position design corresponding with seat crossbeam 200 guarantee that most extrusion force transmits for the seat crossbeam, can absorb most energy at threshold roof beam 100 by the in-process that the extrusion post was crushd. The protector 2 disposed at the lower position of the seat cross member 200 is inclined or curved, and the pressing force transmitted to the battery pack is reduced. This has the advantage of reducing the risk of thermal runaway of the battery pack 2000 fitted to the rocker beam 100.

The utility model discloses threshold roof beam 100 of vehicle is 110mm-135mm through the length of guard portion 2 along first predetermined direction. It is possible to consider both a sufficient accommodation space of the battery pack 2000 and a bottom plate installation space of the battery pack 2000.

As shown in fig. 3 to 5, the lower vehicle body 1000 according to the embodiment of the present invention includes a cross member, a first threshold beam 101, and a second threshold beam 102.

First threshold roof beam 101 and second threshold roof beam 102 set up along first predetermined direction interval ground, and at least one of first threshold roof beam 101 and second threshold roof beam 102 is according to foretell threshold roof beam 100, and the one end of crossbeam links to each other with first threshold roof beam 101, and the other end of crossbeam links to each other with second threshold roof beam 102, and first threshold roof beam 101, second threshold roof beam 102 and crossbeam define the chamber that holds that is used for placing battery package 2000, and second side 22 sets up the one side of keeping away from the chamber in first predetermined direction. In other words, the first rocker beam is according to rocker beam 100 described above; or, the second rocker beam is according to the rocker beam 100 described above; or each of first sill beam 101 and second sill beam 102 is according to sill beam 100 described above.

Therefore, the lower vehicle body 1000 according to the embodiment of the present invention can reduce the impact of the first side surface 21 by providing the second side surface 22 of the protection portion 2 with the weakening structure. Therefore, when the battery pack 2000 is laterally impacted, the transmission of the impact force in the first predetermined direction can be reduced, thereby reducing the pressing of the first side surface 21 to the battery pack. This has the advantage of reducing the risk of thermal runaway of the battery pack 2000 fitted to the lower body 1000.

Specifically, the first rocker beam 101 and the second rocker beam 102 are provided at intervals in the width direction of the vehicle. The second side face 22 is provided on the outer side in the vehicle width direction.

Optionally, each of first and second rocker beams 101 and 102 is according to rocker beam 100 described above. The first rocker beam 101 and the second rocker beam 102 are symmetrically disposed in a first preset direction (a width direction of the vehicle). Therefore, the utility model discloses lower vehicle body 1000 has the advantage that reduces the risk that takes place thermal runaway with this lower vehicle body 1000 matched with battery package 2000.

Optionally, each of first and second rocker beams 101 and 102 overlaps the cross beam.

The utility model discloses electric vehicle includes battery package 2000 and according to foretell lower automobile body 1000, and this battery package 2000 sets up and is holding the intracavity. Therefore, the utility model discloses electric vehicle has the advantage that reduces and take place the risk of thermal runaway with this lower vehicle body 1000 matched with battery package 2000.

The battery pack 2000 includes a base plate and an edge beam, which are overlapped. The utility model discloses electric vehicle includes that battery package 2000 passes through bottom plate and boundary beam overlap joint, when threshold roof beam 100 transmits the battery package with the extrusion force of subtotal, guarantees that this partial extrusion force transmits for lower box bottom plate completely, has reduced the extrusion to electric core. Therefore, the utility model discloses electric vehicle has the advantage that further reduce and this lower vehicle body 1000 matched with battery package 2000 takes place the risk of thermal runaway.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and not intended to limit the invention, and that various changes, modifications, substitutions and alterations can be made herein by those skilled in the art without departing from the scope of the invention.

Claims

1. A rocker beam for a vehicle, comprising:

the connecting part is used for connecting the seat cross beam;

the protective part is connected with the connecting part, the protective part is provided with a first side surface and a second side surface which are opposite to each other along a first preset direction, and the second side surface is obliquely arranged relative to the first preset direction; or, the second side surface is provided as a curved surface protruding toward the first side surface.

2. The rocker beam of the vehicle of claim 1, wherein the connecting portion has a first energy absorbing cavity; or the protective part is provided with a second energy absorption cavity.

3. The vehicle rocker beam of claim 1 wherein the connecting portion has a first energy absorbing chamber and the shield portion has a second energy absorbing chamber, the first and second energy absorbing chambers being separated by a cross bar.

4. The rocker beam of claim 3, wherein a longitudinal rib is provided in the first suction chamber to divide the first suction chamber into a plurality of sub-chambers, the longitudinal rib being connected to a wall surface of the first suction chamber.

5. The rocker beam of the vehicle according to any one of claims 1-4, wherein the connecting portion and the guard portion are arranged in series along a second predetermined direction, the cross-sectional area of the guard portion decreases toward a side away from the connecting portion along the second predetermined direction, and the first predetermined direction is arranged perpendicular to the second predetermined direction.

6. The vehicle rocker beam defined in claim 1, wherein the angle between the second side and the first predetermined direction is between 45 ° and 60 °.

7. The rocker beam of the vehicle according to claim 5, further comprising a bead portion extending in the second predetermined direction, the bead portion being connected to the guard portion.

8. The rocker beam of a vehicle according to any of claims 1-4, characterised in that the length of the shield in the first predetermined direction is 110-135 mm.

9. A lower body, comprising:

a cross beam;

first threshold roof beam and second threshold roof beam, first threshold roof beam with at least one of second threshold roof beam be according to any one of claims 1-8 the threshold roof beam, first threshold roof beam with the second threshold roof beam is followed first predetermined direction interval leaves the setting, the one end of crossbeam with first threshold roof beam links to each other, the other end of crossbeam with the second threshold roof beam links to each other, first threshold roof beam, second threshold roof beam with the crossbeam is injectd and is used for placing holding the chamber of battery package, the second side sets up first predetermined direction is kept away from hold one side in chamber.

10. An electric vehicle characterized by comprising a lower body according to claim 9 and a battery pack, the battery pack being disposed in the accommodation chamber.