CN115285223A - Vehicle body framework, lower vehicle body structure design method and pure electric vehicle - Google Patents
Vehicle body framework, lower vehicle body structure design method and pure electric vehicle Download PDFInfo
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- CN115285223A CN115285223A CN202210937896.0A CN202210937896A CN115285223A CN 115285223 A CN115285223 A CN 115285223A CN 202210937896 A CN202210937896 A CN 202210937896A CN 115285223 A CN115285223 A CN 115285223A
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- 238000013461 design Methods 0.000 title claims abstract description 13
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000013459 approach Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000012856 packing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
Abstract
The invention belongs to the technical field of electric vehicle bodies, and particularly relates to a vehicle body framework, a lower vehicle body structure design method and a pure electric vehicle, which comprise the following steps: the platform universal module comprises a lower vehicle body frame; the battery pack is arranged in the lower body frame; and the height of the position adjusting unit is changed along with the change of the thickness of the battery pack, so that the relative position between the position adjusting unit and the top surface of the battery pack is kept unchanged. The invention takes the lower boundary of the battery pack as a design basis, and the periphery of the vehicle body frame is designed into a lap joint/sealing surface, so that the lap joint relation of the lower floor of the vehicle body and the vehicle body frame in the Z direction is ensured. This approach increases occupant space for thinner battery packs; for thicker battery packs, the ground clearance can be fully utilized; for expanding the CTB scheme, the overlap edge of the vehicle body frame is changed into a sealing surface with a battery pack, and meanwhile, the generalization of the lower vehicle body is also ensured to a greater extent.
Description
Technical Field
The invention belongs to the technical field of electric vehicle bodies, and particularly relates to a vehicle body framework, a lower vehicle body structure design method and a pure electric vehicle.
Background
The floor of the vehicle body is taken as a design reference in the traditional design of the vehicle body, and for battery packs with different thicknesses, the Z-direction space cannot be fully utilized. For a pure electric car, the car height needs to be lower to meet the requirement of modeling movement, and the thickness of a battery pack needs to be as low as possible; for a pure electric SUV, the electric quantity is improved through the increase of the thickness of a battery pack, and the endurance mileage is ensured. However, the existing platform body structure cannot be well compatible for battery packs with different thicknesses, and for battery packs with different thicknesses/types, the Z-direction space of the whole vehicle cannot be fully utilized, or a larger body structure modification is required.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a vehicle body structure, a method for designing a lower vehicle body structure, and a pure electric vehicle, which can improve the versatility of the lower vehicle body.
To achieve the above and other related objects, the present invention provides a vehicle body structure including:
a platform universal module comprising a lower body frame;
the battery pack is arranged in the lower body frame, and the relative position between the bottom surface of the battery pack and the lower body frame is a fixed value;
and the height of the position adjusting unit is changed along with the change of the thickness of the battery pack, so that the relative position between the position adjusting unit and the top surface of the battery pack is kept unchanged.
In an alternative embodiment of the invention, the lower body frame includes:
threshold beams respectively arranged on two sides of the lower vehicle body frame in the width direction;
the front cross beam is positioned on the front side of the lower vehicle body frame, the front cross beam is perpendicular to the threshold beams, and two ends of the front cross beam are respectively connected with the front ends of the two threshold beams;
the rear cross beam is located on the rear side of the lower car body frame, the rear cross beam is parallel to the front cross beam, and two ends of the rear cross beam are connected with the rear ends of the two threshold beams respectively.
In an optional embodiment of the invention, the position adjusting unit includes a bridging surface provided on an inner wall of the lower body frame opposite to a side wall of the battery pack, the bridging surface being cantilevered from the inner wall to above a mounting region of the battery pack.
In an optional embodiment of the invention, the faying surface comprises:
a side lap joint surface on an inner side of the sill beam, and/or
A front faying surface located inside the front cross member, and/or
And the rear lapping surface is positioned on the inner side of the rear cross beam.
In an optional embodiment of the invention, the position adjusting device further comprises a lower floor, and the lower floor is overlapped above the position adjusting unit.
In an alternative embodiment of the invention, the faying surfaces are distributed continuously along the length of the sill beam, the front cross beam and the rear cross beam.
In an optional embodiment of the invention, the battery pack and the lower body frame are packaged by using a CTB technology, and a sealant is arranged between the overlapping surface and the top surface edge of the battery pack.
In an optional embodiment of the invention, a flange which is arranged to overhang the outer side of the side wall of the battery pack is arranged on the edge of the bottom surface of the battery pack, the flange is connected with the bottom surface of the lower body frame through a connecting piece, and the thickness of the flange is a fixed value.
In order to achieve the above and other related objects, the present invention further provides a method for designing a lower vehicle body structure, including the steps of:
providing a platform universal module, wherein the platform universal module comprises a lower vehicle body frame;
obtaining battery pack assembly parameters, wherein the battery pack assembly parameters at least comprise the thickness of a battery pack and the relative position between the bottom surface of the battery pack and the lower body frame after the battery pack is assembled with the lower body frame;
determining the height of a lap joint surface according to the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame;
the faying surface is provided on the inner side of the lower body frame in accordance with the height of the faying surface.
In an optional embodiment of the invention, the step of determining the height of the faying surface according to the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame comprises:
determining the height of the top surface of the battery pack according to the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame;
and determining the height of the lapping surface according to the height of the top surface of the battery pack, so that the distance between the lapping surface and the top surface of the battery pack is within a preset threshold value.
In an optional embodiment of the invention, the method further comprises the following steps:
a lower floor is provided and its edge is lapped over the upper end of the lapping surface.
In an optional embodiment of the invention, the method further comprises the following steps:
and packaging the battery pack and the lower vehicle body frame by adopting a CTB technology, and providing a sealing glue between the top surface edge of the battery pack and the lap joint surface.
In order to achieve the above objects and other related objects, the present invention further provides a pure electric vehicle including the vehicle body structure.
The invention has the technical effects that: the invention takes the lower boundary of the battery pack as a design basis, and the periphery of the vehicle body frame is designed into a lap joint/sealing surface, so that the lap joint relation of the lower floor of the vehicle body and the vehicle body frame in the Z direction is ensured. The vehicle body frame is matched with the floor surface/the battery pack through the up-and-down movement of the lapping surface. This approach increases occupant space for thinner battery packs; for thicker battery packs, the ground clearance can be fully utilized; for expanding the CTB scheme, the overlap edge of the vehicle body frame is changed into a sealing surface with a battery pack, and meanwhile, the generalization of the lower vehicle body is also ensured to a greater extent.
Drawings
Fig. 1 is a plan view of a lower body frame provided by an embodiment of the present invention;
FIG. 2 is an exploded view of a lower body provided by an embodiment of the present invention;
FIG. 3 is an assembly view of a lower body provided by an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a threshold beam provided by an embodiment of the invention;
FIG. 5 is a cross-sectional view of a front cross member provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a rear cross member provided by an embodiment of the present invention;
fig. 7 is a perspective view of a battery pack in a CTB packaging scheme provided by an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a rocker beam in a CTB packaging scheme provided by an embodiment of the present invention;
fig. 9 is a flowchart of a lower vehicle body designing method according to an embodiment of the present invention;
fig. 10 is a flowchart of a faying surface height determining method according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1 to 8, a lower vehicle body structure is realized based on the vehicle body structure of the present invention, and it should be noted that the main purpose of the present invention is to provide a vehicle body structure capable of improving the generalization of the lower vehicle body, rather than a specific vehicle body structure, and in some embodiments, the lower vehicle body structure may be modified appropriately within the boundaries defined by the vehicle body structure of the present invention, for example, the thickness of the battery pack may be increased or decreased, and in this case, the height of the position adjustment unit of the present invention should be changed accordingly.
Referring to fig. 1 to 8, the vehicle body structure includes a platform general module, a battery pack 20, and a position adjusting unit, specifically:
referring to fig. 1-3, the platform utility module includes a lower body frame 10; it will be appreciated that the platform utility module, including but not limited to the lower body frame 10, may be implemented in a variety of vehicle models on the same platform, thereby substantially reducing design and manufacturing costs, and may include other common structures such as a lower floor, a front floor assembly, a rear frame assembly, etc.
Referring to fig. 2 and 4-8, the battery pack 20 is mounted in the lower body frame 10, and a relative position between a bottom surface of the battery pack 20 and the lower body frame 10 is a fixed value; it can be understood that, the bottom surface of the battery pack 20 of the present invention is a design reference, and in the design process of vehicle bodies of different vehicle types, it can be avoided that the overall structure of the lower vehicle body is changed too much, and in the face of different vehicle types, only the height of the top surface of the battery pack 20 will change, and at this time, compatibility of the lower vehicle body on various vehicle types can be achieved only by appropriately changing the position of the lower floor. It should be noted that the specific packaging method of the battery pack 20 of the present invention is not particularly limited, and for example, CTP, CTC or CTB technology may be used for packaging, so as to further improve the compactness and the versatility of the lower body structure.
Referring to fig. 1 to 6, the position adjusting unit is located above the battery pack 20 inside the lower body frame 10, and the height of the position adjusting unit varies with the thickness of the battery pack 20, so that the relative position between the position adjusting unit and the top surface of the battery pack 20 is maintained. It should be noted that, instead of being absolutely unchanged in a mathematical sense, the relative position between the position adjustment unit and the top surface of the battery pack 20 of the present invention is kept unchanged, and a certain error should be allowed; it can be understood that, when the underbody is applied to different vehicle types, since the overall structure of the underbody is designed based on the bottom surface of the battery pack 20, most of the structure of the underbody from bottom to top does not need to be changed, but only the height of the position adjustment unit needs to be changed according to the thickness of the battery pack 20.
The position adjusting unit is mainly used for controlling the height of the floor of the passenger compartment, and flexibly adjusting the height of the floor according to the thickness of the battery pack 20, so that the space of a vehicle body is fully utilized; the specific use of the position adjustment unit is also different in different packing manners, such as a separate lower floor structure when CTP or CTC packing is used, in which the position adjustment unit serves to support and fix the lower floor, and a position adjustment unit, which serves to seal the edges of the battery pack 20 when CTB packing is used, in which the top surface of the battery pack 20 directly serves as the lower floor.
The invention can carry the battery packs 20 with different thicknesses through minor modification, improve the generalization rate of the vehicle body, maximally utilize the Z-direction space and consider the expansion of the subsequent CTB technology.
Referring to fig. 1-6, in one embodiment, the lower body frame 10 includes a rocker beam 11, a front cross beam 12, and a rear cross beam 13; the threshold beam 11 is respectively arranged on two sides of the lower body frame 10 in the width direction; the front cross beam 12 is positioned at the front side of the lower body frame 10, the front cross beam 12 is perpendicular to the threshold beams 11, and two ends of the front cross beam 12 are respectively connected with the front ends of the two threshold beams 11; the rear cross beam 13 is located at the rear side of the lower body frame 10, the rear cross beam 13 is parallel to the front cross beam 12, and two ends of the rear cross beam 13 are connected with the rear ends of the threshold beams 11 respectively.
It is understood that the forming manner of the threshold beam 11, the front cross beam 12 and the rear cross beam 13 is not particularly limited, for example, an integrally extruded aluminum profile may be adopted, or the threshold beam 11, the front cross beam 12 and the rear cross beam 13 may be welded by a plurality of steel stamped parts, the threshold beam 11, the front cross beam 12 and the rear cross beam 13 are hollow structures, and necessary reinforcing ribs 112, 122, 132 are provided in respective cavities thereof, when the threshold beam 11, the front cross beam 12 and the rear cross beam 13 are made of an extruded aluminum profile, the reinforcing ribs 112, 122, 132 may be integrally extruded with the threshold beam 11, the front cross beam 12 and the rear cross beam 13, respectively, and when the threshold beam 11, the front cross beam 12 and the rear cross beam 13 are welded by steel stamped parts, the reinforcing ribs 112, 122, 132 may be formed by stamping separately, and then welded and fixed to the threshold beam 11, the front cross beam 12 and the rear cross beam 13, respectively.
Referring to fig. 1 to 6, in one embodiment, the position adjusting unit includes a lap surface provided on an inner wall of the lower body frame 10 opposite to a side wall of the battery pack 20, the lap surface being cantilevered from the inner wall to above a mounting area of the battery pack 20; in a particular embodiment, the faying surface comprises: a side lap surface 111 on the inner side of the rocker beam 11, a front lap surface 121 on the inner side of the front cross member 12, and a rear lap surface 131 on the inner side of the rear cross member 13. It is understood that the overlap joint may also be distributed, for example, only in a partial region of the lower body frame 10, for example, only on the rocker beam 11 or only on the front cross member 12 and the side cross members, while the present invention preferably continuously distributes the overlap joint over the entire edge of the lower body frame 10 in order to improve the overall support strength of the lower body.
Referring to fig. 1 to 6, in the CTP or CTC packaging scheme, a lower floor 30 is further included, and the lower floor 30 is overlapped above the position adjustment unit. In one embodiment, the lower floor 30 may be integrated with a seat cross member 31, for example, and the seat cross member 31 may serve as a reinforcement for the lower floor 30 to improve the overall structural strength of the lower floor 30.
Referring to fig. 7 and 8, in the CTB packaging scheme, there is no separate lower floor 30 structure, the top surface of the battery pack 20 serves as the lower floor 30, and the edge of the top surface of the battery pack 20 needs to be sealed, for this reason, the faying surfaces are continuously distributed along the length direction of the threshold beam 11, the front cross beam 12 and the rear cross beam 13, and a sealant 23 is provided between the faying surfaces and the edge of the top surface of the battery pack 20.
Referring to fig. 4-8, in a specific embodiment, a flange 21 is provided at an edge of a bottom surface of the battery pack 20 and overhangs to an outer side of a sidewall of the battery pack 20, the flange 21 is connected to the bottom surface of the lower body frame 10 through a connecting member 22, a thickness of the flange 21 is constant, and the connecting member 22 may be a bolt, for example.
Based on the vehicle body framework, the invention also provides a lower vehicle body structure design method, which comprises the following steps:
s10: a platform generic module is provided which includes a lower body frame 10.
S20: obtaining assembly parameters of a battery pack 20, wherein the assembly parameters of the battery pack 20 at least comprise the thickness of the battery pack 20 and the relative position between the bottom surface of the battery pack 20 and the lower body frame 10 after the battery pack 20 and the lower body frame 10 are assembled.
S30: the height of the faying surface is determined according to the thickness of the battery pack 20 and the relative position between the bottom surface of the battery pack 20 and the lower body frame 10.
Specifically, the step S30 includes:
s31: the height of the top surface of the battery pack 20 is determined according to the thickness of the battery pack 20 and the relative position between the bottom surface of the battery pack 20 and the lower body frame 10.
S32: and determining the height of the lapping surface according to the height of the top surface of the battery pack 20, so that the distance between the lapping surface and the top surface of the battery pack 20 is within a preset threshold value.
S40: the faying surface is provided at the inner side of the lower body frame 10 according to the height of the faying surface.
In the CTP or CTC encapsulation scheme, further comprising:
step S50: a lower floor 30 is provided and its edges lap the upper end of the lap surface.
In the CTB encapsulation scheme, further comprising:
step S60: a sealant 23 is provided between the top edge of the battery pack 20 and the faying surface.
The invention further provides a pure electric vehicle designed based on the vehicle body framework.
In summary, the present invention is designed based on the lower boundary of the battery pack 20, and the periphery of the vehicle body frame is designed as a lap/seal surface, so that the lower floor 30 of the vehicle body and the vehicle body frame can ensure a lap relationship in the Z direction. The vehicle body frame is engaged with the lower floor panel 30 and the battery pack 20 by the vertical movement of the engaging surface. This approach increases occupant space for thinner battery packs 20; for thicker battery packs 20, ground clearance is fully utilized; for expanding the CTB scheme, the overlap edge of the vehicle body frame is changed into a sealing surface with the battery pack 20, and meanwhile, the generalization of the lower vehicle body is also ensured to a greater extent.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of embodiments of the invention.
Reference throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and not necessarily in all embodiments, of the present invention. Thus, respective appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined in any suitable manner with one or more other embodiments. It is to be understood that other variations and modifications of the embodiments of the invention described and illustrated herein are possible in light of the teachings herein and are to be considered as part of the spirit and scope of the present invention.
It will also be appreciated that one or more of the elements shown in the figures can also be implemented in a more separated or integrated manner, or even removed for inoperability in some circumstances or provided for usefulness in accordance with a particular application.
Additionally, any reference arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise expressly specified. Further, as used herein, the term "or" is generally intended to mean "and/or" unless otherwise indicated. Combinations of components or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.
As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise specified. Also, as used in the description herein and throughout the claims that follow, the meaning of "in \8230; includes" in 8230; and "on \8230; unless otherwise indicated.
The above description of illustrated embodiments of the invention, including what is described in the abstract of the specification, is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of, and examples for, the invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications may be made to the present invention in light of the foregoing description of illustrated embodiments of the present invention and are to be included within the spirit and scope of the present invention.
The systems and methods have been described herein in general terms as the details aid in understanding the invention. Furthermore, various specific details have been set forth in order to provide a thorough understanding of the embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.
Thus, although the present invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the invention will be employed without a corresponding use of other features without departing from the scope and spirit of the invention as set forth. Thus, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. It is intended that the invention not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the invention is to be determined solely by the appended claims.
Claims (13)
1. A vehicle body architecture, comprising:
a platform utility module comprising a lower body frame;
the battery pack is arranged in the lower body frame, and the relative position between the bottom surface of the battery pack and the lower body frame is a fixed value;
and the height of the position adjusting unit is changed along with the change of the thickness of the battery pack, so that the relative position between the position adjusting unit and the top surface of the battery pack is kept unchanged.
2. The body structure of claim 1, wherein the lower body frame comprises:
threshold beams respectively arranged on two sides of the lower vehicle body frame in the width direction;
the front cross beam is positioned on the front side of the lower vehicle body frame, the front cross beam is perpendicular to the threshold beams, and two ends of the front cross beam are respectively connected with the front ends of the two threshold beams;
and the rear cross beam is positioned at the rear side of the lower car body frame, the rear cross beam is parallel to the front cross beam, and two ends of the rear cross beam are respectively connected with the rear ends of the two threshold beams.
3. The vehicle body structure according to claim 2, wherein the position adjustment unit includes a landing surface provided on an inner wall of the lower body frame opposite to a side wall of the battery pack, the landing surface being cantilevered from the inner wall to above a mounting area of the battery pack.
4. The body structure of claim 3, wherein the faying surface comprises:
a side lap joint on the inner side of the threshold beam, and/or
A front faying surface located inside the front cross member, and/or
And the rear lapping surface is positioned on the inner side of the rear cross beam.
5. The vehicle body structure according to any one of claims 1 to 4, characterized by further comprising a lower floor panel that is lapped over the position adjustment unit.
6. The vehicle body structure according to claim 3, wherein the faying surfaces are continuously distributed along a length direction of the rocker beam, the front cross member, and the rear cross member.
7. The vehicle body structure of claim 6, wherein the battery pack and the lower body frame are encapsulated using CTB technology, and a sealant is disposed between the overlapping surface and the top surface edge of the battery pack.
8. The vehicle body structure according to claim 1, wherein a flange is provided at an edge of a bottom surface of the battery pack so as to overhang an outer side of a side wall of the battery pack, the flange is connected to a bottom surface of the lower body frame by a connecting member, and a thickness of the flange is constant.
9. A method for designing a lower vehicle body structure is characterized by comprising the following steps:
providing a platform general module, wherein the platform general module comprises a lower vehicle body frame;
obtaining battery pack assembly parameters, wherein the battery pack assembly parameters at least comprise the thickness of a battery pack and the relative position between the bottom surface of the battery pack and the lower body frame after the battery pack is assembled with the lower body frame;
determining the height of a lap joint surface according to the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame;
the faying surface is provided on the inner side of the lower body frame in accordance with the height of the faying surface.
10. The lower body structure designing method as set forth in claim 9, wherein the step of determining the height of the faying surface based on the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame includes:
determining the height of the top surface of the battery pack according to the thickness of the battery pack and the relative position between the bottom surface of the battery pack and the lower body frame;
and determining the height of the lapping surface according to the height of the top surface of the battery pack, so that the distance between the lapping surface and the top surface of the battery pack is within a preset threshold value.
11. The lower body structure design method according to claim 10, characterized by further comprising the steps of:
a lower floor is provided and its edge is lapped over the upper end of the lapping surface.
12. The lower body structure design method according to claim 10, characterized by further comprising the steps of:
and packaging the battery pack and the lower body frame by adopting a CTB (computer-to-battery) technology, and providing a sealant between the top surface edge of the battery pack and the lap joint surface.
13. A pure electric vehicle, characterized in that it comprises a body structure according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210937896.0A CN115285223A (en) | 2022-08-05 | 2022-08-05 | Vehicle body framework, lower vehicle body structure design method and pure electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210937896.0A CN115285223A (en) | 2022-08-05 | 2022-08-05 | Vehicle body framework, lower vehicle body structure design method and pure electric vehicle |
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| CN115285223A true CN115285223A (en) | 2022-11-04 |
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| CN202210937896.0A Pending CN115285223A (en) | 2022-08-05 | 2022-08-05 | Vehicle body framework, lower vehicle body structure design method and pure electric vehicle |
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| CN216268644U (en) * | 2020-12-02 | 2022-04-12 | 比亚迪股份有限公司 | Battery package mounting structure and electric motor car of electric motor car |
| CN114802447A (en) * | 2021-08-13 | 2022-07-29 | 长城汽车股份有限公司 | Lower vehicle body middle structure |
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| CN107379949A (en) * | 2016-04-21 | 2017-11-24 | 丰田自动车株式会社 | The battery installation structure of vehicle |
| CN206826766U (en) * | 2017-05-22 | 2018-01-02 | 北京新能源汽车股份有限公司 | A kind of automotive body structure and automobile |
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| CN113815734A (en) * | 2021-11-02 | 2021-12-21 | 上海洛轲智能科技有限公司 | Vehicle body system structure |
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