Battery box and vehicle

Abstract

The present invention discloses a battery box and a vehicle. The battery box includes: a box body; an inner plate, the inner plate includes a front plate, a middle plate and a rear plate connected in sequence along the length direction, the length of the middle plate can be adjusted along the length direction of the inner plate, the front plate, the middle plate and the rear plate are all installed on the inner bottom wall of the box body, the inner plate includes a support surface facing away from the inner bottom wall, and the support surface is provided with an inner groove; an outer beam, the outer beam is installed on the outer wall surface of the box body. The vehicle includes a lower bottom plate and a battery box, and the box body is installed on the lower bottom plate. The battery box and vehicle provided by the present invention improve the arrangement density of the battery modules in the battery box, increase the cruising range of the vehicle, take into account the anti-collision performance and heat dissipation speed of the vehicle, improve the adaptability of the support beam to battery boxes of various sizes, and reduce the production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of battery support, and in particular to a battery box and a vehicle. Background Art

[0002] As a new energy vehicle, electric vehicles have the advantages of energy saving and environmental protection. Electric vehicles are increasingly becoming a hot topic in the automotive field.

[0003] In the prior art, the battery module of an electric vehicle is generally arranged in the lower floor of the vehicle body, and a support beam is arranged in the box structure. The support beam is installed between the battery modules to support the battery modules, ensure the anti-collision performance of the battery, and improve the heat dissipation speed between the battery modules. In the process of realizing the invention, the inventor found that the above battery box has the following shortcomings: First, the support beam occupies the effective space of the lower floor of the vehicle body, reduces the arrangement density of the battery module, and is not conducive to increasing the vehicle's cruising range. Reducing the number of support beams reduces the support effect on the battery module, which is not conducive to the anti-collision performance and heat dissipation speed of the battery; second, the support beam is manufactured according to the size of the lower floor of the vehicle body. When the size of the lower floor of the vehicle body is changed, the support beam also needs to be re-molded and manufactured, which increases the production cost of the support beam.

[0004] Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0005] The present invention provides a battery box and a vehicle to solve the problems existing in the prior art, improve the arrangement density of battery modules in the battery box, increase the cruising range of the vehicle, take into account the anti-collision performance and heat dissipation speed of the vehicle, improve the adaptability of the support beam to battery boxes of various sizes, and reduce production costs.

[0006] The battery box provided by the present invention comprises: a box body; an inner plate, wherein the inner plate comprises a front plate, a middle plate and a rear plate connected in sequence along a length direction, wherein the length of the middle plate can be adjusted along the length direction of the inner plate, wherein the front plate, the middle plate and the rear plate are all mounted on the inner bottom wall of the box body, wherein the inner plate comprises a supporting surface facing away from the inner bottom wall, wherein an inner groove is provided on the supporting surface; and an outer beam, wherein the outer beam is mounted on the outer wall surface of the box body. Both the inner plate and the outer beam can play a role in strengthening the structural strength of the box body, ensuring the anti-collision effect of the battery module located in the box body, wherein the inner plate is laid under the battery module, and the outer beam is located on the outside of the box body, and the outer beam avoids encroaching on the internal space of the box body, and the battery module can be arranged side by side and fit in the box body, thereby increasing the arrangement density of the battery module and improving the cruising range. At the same time, the inner groove can reserve a certain amount of air cooling or liquid cooling space for the battery module and the inner bottom of the box body, taking into account the heat dissipation speed of the battery module, while reducing the dead weight of the inner plate, which is beneficial to further increase the cruising range; when the size of the box body changes along the length direction, the total length of the inner plate can be adjusted by changing the length of the middle plate to adapt to the changed box body without re-opening the mold for manufacturing, thereby increasing the adaptability of the inner plate and reducing the production cost.

[0007] Optionally, the middle plate includes a plurality of splicing plates, and the plurality of splicing plates are sequentially connected along the length direction of the middle plate. By changing the number of connected splicing plates, the length of the inner plate can be shortened or increased, thereby increasing the adaptability of the inner plate to the box. The plurality of splicing plates can be connected by welding, which is easy to operate.

[0008] Optionally, at least one of the front plate, the middle plate and the rear plate includes a plurality of inner cross beams and a plurality of inner longitudinal beams connected in a crisscross pattern, and any two adjacent inner cross beams intersect with any two adjacent inner longitudinal beams to define the inner groove. The inner cross beams and the inner longitudinal beams are staggered to form a mesh support structure, which can increase the structural strength of the inner plate. The inner groove is directly defined by the arrangement of the inner cross beams and the inner longitudinal beams, and does not need to be opened separately, which simplifies the production process of the inner plate and improves production efficiency.

[0009] Optionally, the outer beam comprises a plurality of outer cross beams and a plurality of outer longitudinal beams connected in a crisscross manner, and any of the outer cross beams comprises a plurality of sub-cross beams connected along the length direction. The outer cross beams and the outer longitudinal beams are staggered and connected to form a mesh support structure, which can increase the structural strength of the outer beam. The outer cross beam can select the number of sub-cross beams to be installed according to the width of the box body, so as to increase the adaptability of the outer beam to the box body.

[0010] Optionally, the sub-crossbeam includes a bottom plate and two support plates connected to opposite sides of the bottom plate in a one-to-one correspondence, the bottom plate is arranged opposite to the bottom wall of the box, and the two support plates are mounted on the shell. This embodiment can form a cavity structure between the outer crossbeam and the bottom wall of the box, which can not only increase the heat dissipation effect of the battery module, but also leave a certain compression space in the vertical direction. When the box is squeezed in the vertical direction, the cavity structure can be deformed to play a buffering effect, thereby increasing the safety of the battery module.

[0011] Optionally, a mounting hole is provided on the inner longitudinal beam, a gap is left between the inner longitudinal beam and the inner bottom wall, a nut is installed on the inner longitudinal beam on the side facing the inner bottom wall, and the threaded hole of the nut is aligned with the mounting hole. This embodiment allows the battery module to be fastened to the inner plate by bolts, thereby increasing the structural stability of the battery module after installation. Furthermore, the nut can be a four-corner projection welding nut, and the four corners of the four-corner projection welding nut are provided with outwardly protruding welding points, which can be directly welded and fixed to the inner longitudinal beam through the welding points on the four corners during installation, so as to facilitate positioning and installation. The mounting holes are all arranged on the inner plate, and the inner plate can be formed by stamping, the positioning of the mounting holes is easy to ensure, the manufacturability is good, and the assembly efficiency is effectively improved.

[0012] Optionally, the battery box further comprises a fastening bolt, the stud of which passes through the battery module and the mounting hole in sequence and is then screwed onto the nut. The battery module can be mounted on the inner plate fixed in the box by simply rotating the fastening bolt so that the stud is fastened onto the nut.

[0013] Optionally, a mounting beam is provided on the outer side wall of the box body, a positioning hole is provided on the mounting beam, a positioning column is provided on the outer cross beam, and the positioning column is inserted into the positioning hole. The positioning column is inserted into the positioning hole, which can play a role in preliminary positioning of the outer beam when the outer beam is installed, thereby improving the position accuracy of the outer beam when it is installed.

[0014] Optionally, the front plate is connected to the middle plate by spot welding, and the middle plate is connected to the rear plate by spot welding. This embodiment can reduce the deformation of the front plate and the middle plate, and the middle plate and the rear plate at the connection, make the process parameters easy to control, and make the connection structure stable and reliable.

[0015] Based on the same inventive concept, the present invention also provides a vehicle, comprising a lower floor and a battery box as described in any one of the above, wherein the box is installed on the lower floor.

[0016] The battery box and vehicle provided by the present invention, the inner plate and the outer beam can both play a role in strengthening the structural strength of the box body, thereby ensuring the anti-collision effect of the battery module located in the box body, wherein the inner plate is laid below the battery module, and the outer beam is located on the outside of the box body, the outer beam avoids encroaching on the internal space of the box body, the battery modules can be arranged side by side and fit in the box body, thereby increasing the arrangement density of the battery modules and improving the cruising range, and at the same time the inner groove can reserve a certain amount of air cooling or liquid cooling space for the battery module and the inner bottom of the box body, taking into account the heat dissipation speed of the battery module, while reducing the dead weight of the inner plate, which is conducive to further increasing the cruising range; when the size of the box body along the length direction changes, the total length of the inner plate can be adjusted by changing the length of the middle plate to adapt to the changed box body without re-opening the mold for manufacturing, thereby increasing the adaptability of the inner plate and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein:

[0018] Figure 1 A schematic structural diagram of a battery box provided for an optional embodiment of the present invention.

[0019] Figure 2 for Figure 1 Exploded diagram.

[0020] Figure 3 A schematic structural diagram of an inner panel provided for an optional embodiment of the present invention.

[0021] Figure 4 for Figure 3 Exploded diagram.

[0022] Figure 5 for Figure 3 Top view of the .

[0023] Figure 6 A schematic structural diagram of an outer beam provided for an optional embodiment of the present invention.

[0024] Figure 7 A cross-sectional view is provided for an alternative embodiment of the present invention. DETAILED DESCRIPTION

[0025] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0026] like Figures 1 to 7 As shown, the present invention provides a battery box, including a box body 4, an inner plate 3 and an outer beam 5. The inner plate 3 includes a front plate 32, a middle plate 33 and a rear plate 34 connected in sequence along the length direction, the lengths of the front plate 32 and the middle plate 33 are adjustable along the length direction of the inner plate 3, the middle plate 33 and the rear plate 34 are both installed on the inner bottom wall of the box body 4, the inner plate 3 includes a support surface facing away from the inner bottom wall, and an inner groove 31 is provided on the support surface; the outer beam 5 is installed on the outer side wall surface of the box body 4.

[0027] In the battery box provided by the present invention, both the inner plate 3 and the outer beam 5 can play a role in strengthening the structural strength of the box body 4, thereby ensuring the anti-collision effect of the battery module 1 located in the box body 4, wherein the inner plate 3 is laid below the battery module 1, and the outer beam 5 is located on the outside of the box body 4, and the outer beam 5 avoids occupying the internal space of the box body 4, and the battery module 1 can be arranged side by side and fit in the box body 4, thereby increasing the arrangement density of the battery module 1 and improving the cruising range, and at the same time, the inner groove 31 can reserve a certain amount of air cooling or liquid cooling space for the battery module 1 and the inner bottom of the box body 4, taking into account the heat dissipation speed of the battery module 1, while reducing the dead weight of the inner plate 3, which is conducive to further increasing the cruising range; when the size of the box body 4 along the length direction changes, the total length of the inner plate 3 can be adjusted by changing the length of the middle plate 33 to adapt to the changed box body 4, without the need for re-molding and manufacturing, thereby increasing the adaptability of the inner plate 3 and reducing the production cost.

[0028] This is an embodiment in which the length of a middle plate 33 is adjusted along the length direction of the inner plate 3. The middle plate 33 may include a plurality of splicing plates 35, and the plurality of splicing plates 35 are sequentially connected along the length direction of the middle plate 33. By changing the number of connected splicing plates 35, the length of the inner plate 3 may be shortened or increased, thereby increasing the adaptability of the inner plate 3 to the box body 4. The plurality of splicing plates 35 may be connected by welding, which is easy to operate.

[0029] Preferably, at least one of the front plate 32, the middle plate 33 and the rear plate 34 includes a plurality of inner cross beams 36 and a plurality of inner longitudinal beams 37 connected in a crisscross manner, and any two adjacent inner cross beams 36 and any two adjacent inner longitudinal beams 37 intersect to define the inner groove 31. The inner cross beams 36 and the inner longitudinal beams 37 are staggered and connected to form a mesh support structure, which can increase the structural strength of the inner plate 3. The inner groove 31 is directly defined by the arrangement of the inner cross beams 36 and the inner longitudinal beams 37, and does not need to be opened separately, which simplifies the production process of the inner plate 3 and improves the production efficiency.

[0030] As an optional embodiment, the outer beam 5 includes a plurality of outer cross beams 51 and a plurality of outer longitudinal beams 52 connected in a crisscross manner, and any of the outer cross beams 51 includes a plurality of sub-cross beams connected along the length direction. The outer cross beams 51 and the outer longitudinal beams 52 are staggered and connected to form a mesh support structure, which can increase the structural strength of the outer beam 5 in the longitudinal and transverse directions. The outer cross beam 51 can select the number of sub-cross beams to be installed according to the width of the box body 4 to increase the adaptability of the outer beam 5 to the box body 4.

[0031] On the basis of the above embodiment, the sub-crossbeam includes a bottom plate and two support plates connected to the two sides of the bottom plate in a one-to-one correspondence, the bottom plate is arranged opposite to the bottom wall of the box body 4, and the two support plates are installed on the shell. This embodiment can form a cavity structure between the outer crossbeam 51 and the bottom wall of the box body 4, which can not only increase the heat dissipation effect of the battery module 1, reduce the deadweight of the outer crossbeam 51, and increase the lateral anti-extrusion characteristics of the outer crossbeam 51, but also reserve a certain compression space in the vertical direction. When the box body 4 is squeezed in the vertical direction, the cavity structure can be deformed to play a buffering effect, thereby increasing the safety of the battery module 1.

[0032] Optionally, a mounting hole 38 is provided on the inner longitudinal beam 37, a gap is left between the inner longitudinal beam 37 and the inner bottom wall, a nut is installed on the side of the inner longitudinal beam 37 facing the inner bottom wall, and the threaded hole of the nut is aligned with the mounting hole 38. This embodiment allows the battery module 1 to be fastened to the inner plate 3 by bolts, thereby increasing the structural stability of the battery module 1 after installation. Furthermore, the nut can be a four-corner projection welding nut, and the four corners of the four-corner projection welding nut are provided with outwardly protruding welding points. During installation, it can be directly welded and fixed to the inner longitudinal beam 37 through the welding points on the four corners, which is convenient for positioning and installation. The mounting holes 38 are all arranged on the inner plate 3, and the inner plate 3 can be formed by stamping. The positioning of the mounting holes 38 is easy to ensure, the manufacturability is good, and the assembly efficiency is effectively improved.

[0033] On the basis of the above embodiment, the battery box further comprises a fastening bolt 2, the stud of the fastening bolt 2 is sequentially passed through the battery module 1 and the mounting hole 38 and then screwed onto the nut. The battery module 1 can be mounted on the inner plate 3 fixed in the box body 4 by simply rotating the fastening bolt 2 so that the stud is fastened onto the nut.

[0034] Preferably, a mounting beam 6 is provided on the outer side wall of the box body 4, a positioning hole 61 is provided on the mounting beam 6, and a positioning column 53 is provided on the outer cross beam 51, and the positioning column 53 is inserted into the positioning hole 61. The positioning column 53 is inserted into the positioning hole 61, which can play a role in preliminary positioning of the outer beam 5 when the outer beam 5 is installed, thereby improving the position accuracy of the outer beam 5 when it is installed.

[0035] Optionally, the front plate 32 is spot-welded to the middle plate 33, and the middle plate 33 is spot-welded to the rear plate 34. This embodiment can reduce the deformation at the connection between the front plate 32 and the middle plate 33, and between the middle plate 33 and the rear plate 34, make the process parameters easy to control, and make the connection structure stable and reliable.

[0036] Based on the same inventive concept, the present invention also provides a vehicle, including a lower floor and a battery box, wherein the box body 4 is installed on the lower floor.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery box, characterized in that: include: Box; An inner plate, the inner plate comprising a front plate, a middle plate and a rear plate connected in sequence along a length direction, the length of the middle plate being adjustable along the length direction of the inner plate, the front plate, the middle plate and the rear plate being all mounted on the inner bottom wall of the box body, the inner plate comprising a support surface facing away from the inner bottom wall, an inner groove being provided on the support surface; An outer beam, the outer beam being mounted on an outer side wall of the box body; The outer beams include a plurality of outer cross beams and a plurality of outer longitudinal beams connected in a crisscross pattern, and any of the outer cross beams includes a plurality of sub-cross beams connected along the length direction; The sub-crossbeam includes a bottom plate and two supporting plates connected to two opposite sides of the bottom plate in a one-to-one correspondence, the bottom plate is arranged opposite to the bottom wall of the box body, and the two supporting plates are installed on the box body; A cavity structure is formed between the outer cross beam and the bottom wall of the box body.

2. The battery box according to claim 1, characterized in that: The middle plate includes a plurality of splicing plates, and the plurality of splicing plates are sequentially connected along the length direction of the middle plate.

3. The battery box according to claim 1, characterized in that: At least one of the front plate, the middle plate and the rear plate includes a plurality of inner cross beams and a plurality of inner longitudinal beams connected in a criss-cross pattern, and any two adjacent inner cross beams intersect with any two adjacent inner longitudinal beams to define the inner groove.

4. The battery box according to claim 3, characterized in that: The inner longitudinal beam is provided with a mounting hole, a gap is left between the inner longitudinal beam and the inner bottom wall, a nut is installed on the side of the inner longitudinal beam facing the inner bottom wall, and the threaded hole of the nut is aligned with the mounting hole.

5. The battery box according to claim 4, characterized in that: The battery box also includes a fastening bolt, the stud of which passes through the battery module and the mounting hole in sequence and is then screwed onto the nut.

6. The battery box according to claim 5, characterized in that: A mounting beam is arranged on the outer side wall of the box body, a positioning hole is opened on the mounting beam, a positioning column is arranged on the outer cross beam, and the positioning column is inserted into the positioning hole.

7. The battery box according to any one of claims 1 to 6, characterized in that: The front plate is connected to the middle plate by spot welding, and the middle plate is connected to the rear plate by spot welding.

8. A vehicle comprising a lower floor, characterized in that: Also includes: The battery box according to any one of claims 1 to 7, wherein the box body is mounted on the lower base plate.

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