CN112793668B - Electric vehicle lower body frame and electric vehicle thereof - Google Patents
Electric vehicle lower body frame and electric vehicle thereof Download PDFInfo
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- CN112793668B CN112793668B CN202110125621.2A CN202110125621A CN112793668B CN 112793668 B CN112793668 B CN 112793668B CN 202110125621 A CN202110125621 A CN 202110125621A CN 112793668 B CN112793668 B CN 112793668B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D23/00—Combined superstructure and frame, i.e. monocoque constructions
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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
- 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
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- Body Structure For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention relates to a lower vehicle body frame of an electric vehicle and the electric vehicle thereof, wherein the lower vehicle body frame of the electric vehicle comprises a front cabin assembly, a front floor assembly and a rear floor assembly, the front floor assembly comprises a battery installation frame, a front floor panel and a battery tray, the battery installation frame comprises two threshold beams and two first cross beams, two ends of each threshold beam are respectively and fixedly connected with the front cabin assembly and the rear floor assembly, the two threshold beams are fixedly connected through the two first cross beams, the threshold beams adopt a hollow structure, and are arranged into an anti-collision structure, so that a side collision force is transmitted to the front cabin assembly and the rear floor assembly when the threshold beams are impacted; the battery frame directly participates in the side collision supporting structure, so that the structural transmission path during side collision is increased, and the passive safety performance of the vehicle is improved.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a lower body frame of an electric vehicle and the electric vehicle
Background
In recent years, the safety of a pure electric vehicle is more and more emphasized by people, wherein a battery pack assembly is positioned at the bottom of a passenger compartment of the electric vehicle, is used as a core part of the electric vehicle, and is also a key sensitive part for collision safety design of the electric vehicle.
As shown in fig. 1, the conventional battery installation mode is that a battery cell module is installed in an independent battery pack, and the battery pack is connected to a longitudinal beam under the floor or a side sill beam through a vehicle body bolt. The battery pack in the traditional battery mounting mode needs to be surrounded by the upper cover and the lower cover of the battery pack, so that the whole weight is heavier, and the energy density is low; the space between the battery pack and the vehicle body is wasted, and the electric quantity of the vehicle loading cannot be improved.
More information about the above solution can also be found in the following documents:
the invention discloses an electric vehicle battery system capable of being increased and decreased by using a lower vehicle body as a battery box body in Chinese invention patent with publication number CN104393209B, which comprises a single battery pack (100), a main control box (200), a connecting wire harness (300), a lower floor layer (400), an upper floor layer, the lower vehicle body (600) and a sealing plate (700), wherein the single battery pack (100) is connected with the lower vehicle body (600) through a bolt (108), the main control box (200) is connected with the lower vehicle body (600) through the bolt (108), the lower floor layer (400) is welded with the lower vehicle body (600) together and is relatively fixed, a single battery pack connector (301) is installed on the lower floor layer (400) through threaded connection, the main control box connector (303) is also installed on the lower floor layer (400) through threaded connection, the lower vehicle body is used as the box body of the battery box, so that the theoretical design of the rigidity and the strength of the whole vehicle is more reasonable; according to the invention, a plurality of single battery packs form a battery system, and the requirements on the self structure and the mounting structure of the single battery packs are reduced.
An aluminum alloy electric vehicle frame and an electric vehicle are disclosed in the Chinese utility model with the publication number of CN206297615U, wherein the lower vehicle body frame of the aluminum alloy electric vehicle comprises a front frame section, a middle frame section and a rear frame section, the front frame section, the middle frame section and the rear frame section are fixedly connected in sequence, and the front frame section, the middle frame section and the rear frame section are made of aluminum alloy; the front frame section comprises a first longitudinal beam and a second longitudinal beam, the first longitudinal beam comprises a first straight line section and a first bending section, the second longitudinal beam comprises a second straight line section and a second bending section, the first bending section is fixedly arranged on the second straight line section, the second bending section is fixedly arranged on the first straight line section, and obtuse angles are formed between the first straight line section and the first bending section and between the second bending section and the second straight line section. The utility model discloses a body frame and electric motor car under aluminum alloy electric motor car adopts a split type frame, has effectively reduced the processing degree of difficulty, has realized the lightweight of whole car, has practiced thrift the electric energy, has guaranteed the security that the car travel.
In the process of implementing the invention, the inventor finds that the following problems exist in the prior art:
in the prior art, the battery core module is required to be installed into an independent battery pack firstly, and the battery pack is connected to a longitudinal beam under the floor or a side wall threshold beam through a bolt, so that the space is wasted; or, in the prior art, the battery pack is directly arranged on the lower vehicle body, so that the battery pack is exposed outside, and the battery pack is easily damaged when the vehicle body is collided.
Disclosure of Invention
Therefore, the lower vehicle body frame of the electric vehicle and the electric vehicle thereof need to be provided, and the problem that the battery pack is exposed outside and is easily damaged when the vehicle body is collided due to the fact that the battery pack is directly installed on the lower vehicle body in the prior art is solved.
In order to achieve the above purpose, the inventor provides a lower body frame of an electric vehicle, which comprises a front cabin assembly, a front floor assembly and a rear floor assembly, wherein the front cabin assembly is connected with the rear floor assembly through the front floor assembly;
the front floor assembly comprises a battery installation frame, a front floor panel and a battery tray, the battery installation frame comprises two threshold beams and two first cross beams, two ends of each threshold beam are fixedly connected with the front cabin assembly and the rear floor assembly respectively, the two threshold beams are fixedly connected through the two first cross beams, a containing cavity for containing a battery module is formed by the two threshold beams and the two first cross beams, each threshold beam is of a hollow structure, and is set to be an anti-collision structure, so that when the threshold beams are impacted, side impact force is transmitted to the front cabin assembly and the rear floor assembly;
the front floor panel is fixed on the battery installation frame, the battery tray is used for dragging the battery module, and the battery tray is fixedly connected with the bottom of the battery installation frame.
In one embodiment of the present invention, the front floor panel is provided with two or more reinforcement beams, both ends of each reinforcement beam are connected to the two rocker beams, and the reinforcement beams are configured to transmit an impact force to one rocker beam to the other rocker beam when the other rocker beam receives the impact force.
As an embodiment of the present invention, the rocker beam is provided such that, when the battery module is placed on the battery tray, an outer side of the outermost battery module abuts against an inner side of the rocker beam, and the battery module is provided to support the inner side of the rocker beam when an impact force is applied to the rocker beam.
As an embodiment of the present invention, the front floor panel is configured such that a top of the battery module abuts against a bottom of the front floor panel when the battery module is disposed on the battery tray.
As an implementation manner of the invention, the battery mounting frame further comprises a longitudinal beam, two ends of the longitudinal beam are respectively connected with the two first cross beams, the longitudinal beam is parallel to the threshold beam, and the longitudinal beam, the two first cross beams and the two threshold beams divide the accommodating cavity into two sub-accommodating cavities.
As an embodiment of the present invention, the battery mounting frame further includes at least one second cross member, two ends of the second cross member are respectively connected to the two threshold beams, the second cross member is configured to transmit an impact force to the other threshold beam when the threshold beam receives the impact force, the second cross member is parallel to the first cross member, and the second cross member partitions the two sub receiving cavities into four or more sub receiving cavities.
As an embodiment of the present invention, the battery tray is fixedly connected to the battery mounting frame by bolts.
As an embodiment of the present invention, the battery mounting frame is made of an aluminum alloy profile.
As an embodiment of the present invention, the two rocker beams and the two first cross members are fixed by welding.
Be different from prior art, above-mentioned technical scheme includes battery installation frame, preceding floor panel and battery tray through preceding floor assembly, battery installation frame includes two threshold roof beams and two first crossbeams, the both ends of threshold roof beam respectively with the front deck assembly back floor assembly fixed connection, two the threshold roof beam is through two first crossbeam fixed connection, two the threshold roof beam and two first crossbeam forms the chamber that holds that is used for holding the battery module, the threshold roof beam adopts hollow structure, the threshold roof beam is set up to crashproof structure, when receiving the striking, transmits side impact for the front deck assembly and back floor assembly. Therefore, the battery mounting frame is combined with the vehicle body structure, the upper cover plate structure of the traditional electric vehicle battery pack is reduced, the effects of reducing weight and reducing cost are achieved, meanwhile, because the battery cell is directly mounted below the lower vehicle body, the mounting gap between the traditional electric vehicle battery pack and the floor panel and the sill beam inner plate on the vehicle body is not required to be reserved, a space is provided for upward arrangement of the battery, the size of the battery in the vertical direction is reduced, the ground clearance of the battery assembly can be enlarged, and the purpose of protecting the battery is achieved; the battery frame is integrated with the vehicle body structure, so that the torsional rigidity and the bending rigidity of the vehicle body are improved, the battery frame directly participates in the side collision supporting structure, the structure transmission path during side collision is increased, and the passive safety performance of the vehicle is improved.
The inventor also provides an electric vehicle which comprises the electric vehicle lower body frame.
The battery cell is directly arranged below the lower vehicle body, so that the installation gap between the traditional electric vehicle battery pack and a floor panel and a threshold beam inner plate on the vehicle body is not required to be reserved, a space is provided for upward arrangement of the battery, the size of a battery monomer in the vertical direction is reduced, the ground clearance of a battery assembly can be enlarged, and the purpose of protecting the battery is achieved; the battery mounting frame is integrated with the vehicle body structure, so that the torsional rigidity and the bending rigidity of the vehicle body are improved, the battery frame directly participates in the side collision supporting structure, the structure transmission path during side collision is increased, and the passive safety performance of the vehicle is improved.
Drawings
FIG. 1 is a schematic structural view of a lower body frame of an electric vehicle according to an embodiment;
FIG. 2 is an exploded view of a lower body frame of an electric vehicle according to an embodiment;
FIG. 3 is an exploded view of another embodiment of a lower body frame of an electric vehicle;
FIG. 4 is a schematic structural view of a front floor assembly according to an embodiment;
FIG. 5 is an exploded view of the front floor assembly according to the exemplary embodiment;
FIG. 6 is an exploded view of the battery mounting frame according to the preferred embodiment;
FIG. 7 is an exploded view of another embodiment of a battery mounting frame;
FIG. 8 is a schematic cross-sectional view of a front floor assembly according to an embodiment.
The description of the reference numerals,
1. the front cabin assembly is arranged on the front cabin,
2. a front floor assembly, a rear floor assembly,
21. a battery mounting frame for mounting a battery to a battery,
211. a sill beam is arranged on the front side of the door sill,
212. the first cross beam is provided with a first cross beam,
213. the accommodating cavity is used for accommodating the liquid crystal display panel,
213a of the sub-receiving cavities, and a sub-receiving cavity,
214. the second cross beam is provided with a second cross beam,
22. a front floor panel, a rear floor panel,
221. the reinforcing beam is a beam which is reinforced,
23. the tray of the battery is provided with a battery tray,
24. the bolt is arranged on the base plate and is provided with a bolt,
25. the longitudinal beam,
3. the back floor assembly is arranged on the back floor assembly,
4. a vehicle seat.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
Referring to fig. 1 to 8, the present embodiment provides an electric vehicle including a lower vehicle body frame of the electric vehicle as follows. The lower vehicle body frame of the electric vehicle comprises a front cabin assembly 1, a front floor assembly 2 and a rear floor assembly 3, wherein the front cabin assembly 1 is connected with the rear floor assembly 3 through the front floor assembly 2. The lower vehicle body frame of the electric vehicle integrates the traditional battery pack frame structure and the vehicle body structure into a whole by welding.
In this embodiment, the front floor assembly 2 includes a battery mounting frame 21, a front floor panel 22 and a battery tray 23, the battery mounting frame 21 includes two threshold beams 211 and two first cross beams 212, two ends of the threshold beams 211 are respectively fixedly connected with the front cabin assembly 1 and the rear floor assembly 3, the two threshold beams 211 are fixedly connected through the two first cross beams 212, the two threshold beams 211 and the two first cross beams 212 form an accommodating cavity 213 for accommodating the battery module, the threshold beams 211 are of a hollow structure, the threshold beams 211 are set to be an anti-collision structure, and when being impacted, the side impact force is transmitted to the front cabin assembly 1 and the rear floor assembly 3;
the front floor panel 22 is fixed to the battery mounting frame 21, the battery tray 23 is used to hold the battery modules, and the battery tray 23 is fixedly connected to the bottom of the battery mounting frame 21.
Therefore, the battery mounting frame 21 is combined with the vehicle body structure, the upper cover plate structure of the traditional electric vehicle battery pack is reduced, the effects of reducing weight and reducing cost are achieved, meanwhile, because the battery cell is directly mounted below the lower vehicle body, the mounting gap between the traditional electric vehicle battery pack and the floor panel on the vehicle body and the inner plate of the doorsill beam 211 is not required to be reserved, a space is provided for upward arrangement of the battery, the size of the battery in the vertical direction is reduced, the ground clearance of the battery assembly can be enlarged, and the purpose of protecting the battery is achieved; the battery mounting frame 21 is integrated with a vehicle body structure, so that the torsional rigidity and the bending rigidity of the vehicle body are improved, the battery frame directly participates in a side collision supporting structure, a structure transmission path in side collision is increased, and the passive safety performance of the vehicle is improved.
Alternatively, as shown in fig. 4 to 7, the front floor panel 22 is provided with more than two reinforcement beams 221, both ends of the reinforcement beams 221 are connected to the two rocker beams 211, respectively, and the reinforcement beams 221 are configured to transmit an impact force, which is received by one rocker beam 211, to the other rocker beam 211. Therefore, the integration of the battery installation frame 21 and the vehicle body structure is realized, the torsional rigidity and the bending rigidity of the vehicle body are improved, the battery installation frame 21 directly participates in the side collision supporting structure, the structure transmission path in the side collision is increased, and the passive safety performance of the vehicle is improved.
Optionally, the battery mounting frame 21 further includes a longitudinal beam 25, two ends of the longitudinal beam 25 are respectively connected to the two first cross beams 212, and the longitudinal beam 25 is parallel to the threshold beam 211; in the present embodiment, one longitudinal beam 25 is divided into three longitudinal beams 25, and the three longitudinal beams 25, the two first cross beams 212, and the two threshold beams 211 divide the accommodation chamber 213 into two sub-accommodation chambers 213 a. The provision of the stringers 25 both divides the placement of the battery pack and provides a secure grip for the battery pack on the other hand.
Optionally, the battery mounting frame 21 further includes at least one second cross member 214, two ends of the second cross member 214 are respectively connected to the two threshold beams 211, the second cross member 214 is configured to transmit an impact force to one threshold beam 211 when the other threshold beam 211 receives the impact force, the second cross member 214 is parallel to the first cross member 212, and the second cross member 214 divides the two sub receiving cavities 213a into more than four sub receiving cavities 213 a. Specifically, the arrangement of the second cross member 214 and the longitudinal members 25 of the battery mounting frame 21 is determined according to the distribution of the battery packs.
Alternatively, the battery mounting frame 21 is made of an aluminum alloy profile. On the one hand, the weight of the whole vehicle is reduced, on the other hand, the arrangement requirements of different batteries and the platform of the whole vehicle on different wheel bases can be met quickly, and the whole development period and the cost are reduced.
Alternatively, the two rocker beams 211 and the two first cross beams 212 are fixed by welding. In other embodiments, the two threshold beams 211 and the two first cross beams 212 may be fixed by means of bolts 24.
Alternatively, as shown in fig. 8, the rocker beam 211 is configured such that the outer side of the outermost battery module abuts against the inner side of the rocker beam 211 when the battery module is placed on the battery tray 23, and the battery module is configured such that the inner side of the rocker beam 211 is supported when the rocker beam 211 receives an impact force. At the moment, the installation gap between the floor panel and the inner plate of the threshold beam 211 on the traditional electric vehicle battery pack and the vehicle body is not required to be reserved, the arrangement space of the whole vehicle in the horizontal direction is increased for the battery, and more possibility is provided for increasing the arrangement space of the battery pack for the increase of the electric quantity and the endurance mileage of the whole vehicle. The utilization rate of the gap between the battery pack and the vehicle body is improved, and the battery capacity of the electric vehicle is increased.
Alternatively, the front floor panel 22 is arranged such that when the battery module is set on the battery tray 23, the top of the battery module abuts against the bottom of the front floor panel 22, and the car seat 4 is disposed above the front floor panel 22. Therefore, space is provided for upward arrangement of the batteries, the size of the batteries in the vertical direction is reduced, and the ground clearance of the battery assembly can be increased, so that the purpose of protecting the batteries is achieved.
Alternatively, the battery tray 23 is fixedly connected to the battery mounting frame 21 by bolts 24. Specifically, the battery is mounted on the battery tray 23 first, and then the battery tray 23 is mounted on the battery mounting frame 21 by the bolts 24.
When the battery installing frame 21 is used, the threshold beams 211 at two sides and the front and rear first cross beams 212 are spliced by welding or bolt 24 connection and the like, the whole size precision of the bottom surface of the battery installing frame 21 is ensured, the sealing size requirement during the subsequent installation of the battery tray 23 is met, and then the longitudinal beams 25 or the second cross beams 214 are spliced by welding or bolt 24 connection and the like according to the distribution of batteries to form the complete battery installing frame 21; the front floor panel 22 is fixed to the battery mounting frame 21. The battery module is placed on the battery tray 23, and the battery tray 23 is fixed to the battery mounting frame 21 by the bolts 24, completing the assembly.
The electric vehicle lower body frame is simple to mount, the battery frame directly participates in the side collision supporting structure, the structure transmission path during side collision is increased, and the passive safety performance of the vehicle is improved.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (7)
1. The frame of the lower body of the electric vehicle is characterized by comprising a front cabin assembly, a front floor assembly and a rear floor assembly, wherein the front cabin assembly is connected with the rear floor assembly through the front floor assembly;
the front floor assembly comprises a battery installation frame, a front floor panel and a battery tray, the battery installation frame comprises two threshold beams and two first cross beams, two ends of each threshold beam are fixedly connected with the front cabin assembly and the rear floor assembly respectively, the two threshold beams are fixedly connected through the two first cross beams, a containing cavity for containing a battery module is formed by the two threshold beams and the two first cross beams, each threshold beam is of a hollow structure, and is set to be an anti-collision structure, so that when the threshold beams are impacted, side impact force is transmitted to the front cabin assembly and the rear floor assembly;
the front floor panel is fixed on the battery mounting frame, the battery tray is used for supporting the battery module, and the battery tray is fixedly connected with the bottom of the battery mounting frame;
the threshold beam is arranged in such a way that when the battery modules are arranged on the battery tray, the outer side of the outermost battery module abuts against the inner side of the threshold beam, and the battery modules are arranged in such a way that when the threshold beam is subjected to impact force, the inner side of the threshold beam is supported;
the front floor panel is arranged such that when the battery module is arranged on the battery tray, the top of the battery module abuts against the bottom of the front floor panel, and the car seat is arranged above the front floor panel;
the battery tray is fixedly connected with the battery installation frame through bolts, the batteries are installed on the battery tray firstly, and then the battery tray is installed on the battery installation frame through the bolts.
2. The lower body frame of an electric vehicle as claimed in claim 1, wherein the front floor panel is provided with two or more reinforcement beams, both ends of the reinforcement beams are connected to the two rocker beams, respectively, and the reinforcement beams are configured to transmit an impact force to one of the rocker beams when the other rocker beam receives the impact force.
3. The electric vehicle lower body frame according to claim 1, wherein the battery mounting frame further comprises a longitudinal beam, two ends of the longitudinal beam are respectively connected with the two first cross beams, the longitudinal beam and the threshold beam are parallel to each other, and the longitudinal beam, the two first cross beams and the two threshold beams divide the accommodating cavity into two sub-accommodating cavities.
4. The lower body frame of the electric vehicle as claimed in claim 3, wherein the battery mounting frame further comprises at least one second cross member, both ends of the second cross member are connected to the two threshold beams, respectively, the second cross member is configured to transmit an impact force to the other threshold beam when the threshold beam receives the impact force, the second cross member is parallel to the first cross member, and the second cross member divides the two sub receiving cavities into more than four sub receiving cavities.
5. The electric vehicle lower body frame according to claim 1, wherein the battery mounting frame is made of an aluminum alloy section.
6. The electric vehicle lower body frame according to claim 1, wherein the two threshold beams and the two first cross beams are fixed by welding.
7. An electric vehicle characterized by comprising the electric vehicle lower body frame according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110125621.2A CN112793668B (en) | 2021-01-29 | 2021-01-29 | Electric vehicle lower body frame and electric vehicle thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110125621.2A CN112793668B (en) | 2021-01-29 | 2021-01-29 | Electric vehicle lower body frame and electric vehicle thereof |
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| CN112793668A CN112793668A (en) | 2021-05-14 |
| CN112793668B true CN112793668B (en) | 2022-07-01 |
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| CN114954662B (en) * | 2022-06-30 | 2023-10-31 | 奇瑞汽车股份有限公司 | Split type new energy automobile body structure and assembling method thereof |
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