CN113859364B

CN113859364B - Electric automobile

Info

Publication number: CN113859364B
Application number: CN202111360076.1A
Authority: CN
Inventors: 郭迎庆; 王月; 唐莉
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-11-08
Anticipated expiration: 2041-11-17
Also published as: CN113859364A

Abstract

The invention provides an electric automobile, and relates to the technical field of automobiles. Wherein, this electric automobile includes: the automobile body, preceding sub vehicle frame, the battery package, sub vehicle frame stiffening beam and battery package protection crossbeam, the equal fastening connection of preceding sub vehicle frame and battery package is in the bottom of automobile body, and preceding sub vehicle frame interval sets up in the place ahead of battery package, the rear end fastening connection of sub vehicle frame stiffening beam and preceding sub vehicle frame, battery package protection crossbeam fastening connection is in the bottom of automobile body, battery package protection crossbeam is located between battery package and the preceding sub vehicle frame, and be located sub vehicle frame stiffening beam's rear, sub vehicle frame stiffening beam's bottom surface and battery package protection crossbeam's bottom surface all are located the below of the bottom surface of battery package. According to the electric automobile provided by the invention, the auxiliary frame reinforcing cross beams and the battery pack protecting cross beams which are distributed in the front-back direction are arranged between the rear end of the front auxiliary frame and the battery pack, so that a secondary protection structure for the battery pack is formed, and the protection effect for the battery pack is improved.

Description

Electric automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to an electric automobile.

Background

In an electric vehicle, wheels are driven by a motor to run using a vehicle-mounted power supply as power. In the running process of the electric automobile, the bottom of the electric automobile is collided, so that the battery pack is easy to scratch, support the bottom, hit balls or puncture and the like, and further, accidents such as local deformation, pipeline failure, liquid leakage, heating runaway, fire ignition, explosion and the like of the battery pack are easy to cause. In order to improve the safety of the battery pack at the bottom of the electric automobile when the electric automobile runs, a battery pack protection structure is additionally arranged at the bottom of the automobile body.

The conventional battery pack protection structure for an electric vehicle is often a protection member fastened to the bottom of a front subframe of the electric vehicle, and the protection member is disposed in front of the battery pack and receives an impact from the front to protect the battery pack.

The existing electric automobile has poor protection performance on a battery pack at the bottom.

Disclosure of Invention

The invention aims to provide an electric automobile, which aims to solve the problem that the protection performance of a battery pack at the bottom of the electric automobile is poor in the prior art.

The present invention provides an electric vehicle, including: automobile body, preceding sub vehicle frame, battery package, sub vehicle frame web beam and battery package protection crossbeam.

Preceding sub vehicle frame and battery package all fastening connection in the bottom of automobile body, and preceding sub vehicle frame interval sets up in the place ahead of battery package.

And the auxiliary frame reinforcing cross beam is fixedly connected with the rear end of the front auxiliary frame.

The battery pack protection cross beam is tightly connected to the bottom of the vehicle body, is arranged between the battery pack and the front auxiliary frame and is located behind the auxiliary frame reinforcing cross beam.

The bottom surface of sub vehicle frame stiffening beam and the bottom surface of battery package protection crossbeam all are located the below of the bottom surface of battery package.

Optionally, the subframe reinforcing beam and/or the battery pack protecting beam are hollow beams.

Optionally, a partition plate is arranged in the auxiliary frame reinforcing beam and/or the battery pack protecting beam, and an inner cavity of the auxiliary frame reinforcing beam and/or the battery pack protecting beam is divided by the partition plate arranged in the auxiliary frame reinforcing beam and/or the battery pack protecting beam to form a plurality of energy absorption cavities.

Optionally, the subframe reinforcing beam comprises an upper portion and a lower portion, the lower side of the upper portion is fixedly connected with the upper side of the lower portion, the partition plate comprises a first partition plate, the first partition plate is horizontally arranged, the first partition plate is arranged at the joint of the upper portion and the lower portion, the inner cavity of the upper portion and the inner cavity of the lower portion are separated by the first partition plate, and at least one energy absorption cavity is formed in each of the upper portion and the lower portion.

Optionally, the baffle further includes a second baffle, two ends of the second baffle extend in the left-right direction, and the inner cavities of the upper portion and the lower portion are separated by the second baffle to form a plurality of energy absorption cavities distributed in the front-back direction.

Optionally, the number of energy-absorbing chambers in the upper portion is greater than the number of energy-absorbing chambers in the lower portion.

And/or the volume of the energy-absorbing chamber in the lower portion is greater than the volume of the energy-absorbing chamber in the upper portion.

Optionally, the second partition is vertically arranged.

And/or the second partition plates in the upper part are distributed in a staggered way with the second partition plates in the lower part.

Optionally, the rear side of the upper portion is located behind the rear side of the lower portion, a recessed portion for accommodating the rear end of the upper portion is arranged on the front side of the battery pack protection cross beam, the rear end of the upper portion is embedded into the recessed portion, and the upper portion and the lower portion are arranged at intervals with the battery pack protection cross beam.

Optionally, a plurality of energy absorption cavities distributed up and down are formed in the battery pack protection beam.

Optionally, the top of the subframe reinforcing cross beam is provided with a first mounting hole, and the first mounting hole is used for being fastened and connected with the bottom of the rear end of the front subframe through a bolt.

The front side surface of the auxiliary frame reinforcing beam is an inclined surface inclined backwards from top to bottom.

The battery pack protection cross beam is provided with a second mounting hole, the second mounting hole is used for being fastened and connected with the front end of a battery pack or the rear end of a front auxiliary frame through a bolt, and the battery pack protection cross beam is fastened and connected with a vehicle body through the battery pack or the front auxiliary frame.

According to the electric automobile provided by the invention, when the bottom of the electric automobile is impacted by a foreign matter, the foreign matter is firstly impacted and fixedly connected with the auxiliary frame reinforcing beam at the rear end of the front auxiliary frame, the auxiliary frame reinforcing beam is used as a first-stage protection, is subjected to impact crushing deformation and transmits impact force to the front auxiliary frame, and bears the first impact together with the front auxiliary frame, the electric automobile is slightly vacated after being impacted for the first time and continues to move forwards under inertia, the battery pack protecting beam which is positioned behind the auxiliary frame reinforcing beam and fixedly connected with the bottom of the automobile body is used as a second-stage protection and bears the second impact of the foreign matter, the battery pack protecting beam absorbs energy generated by the second impact and transmits the impact force to the automobile body, and bears the second impact together with the whole automobile body, a large amount of energy of the impact of the foreign matter is absorbed through two-stage protection, the direct impact of the foreign matter on a battery pack behind the battery pack protecting beam can be reduced, and the protection performance of the battery pack is good. In addition, the auxiliary frame reinforcing beam can also improve the rigidity of the auxiliary frame, and the shock resistance of the front auxiliary frame and the control stability of the electric automobile in the driving process can be improved. Adopt the sub vehicle frame strengthening beam of components of a whole that can function independently and the secondary protection structure that the battery package protects the crossbeam and forms, the size matching precision of assembly requires lowly, and convenient assembling does benefit to arranging and adjusting at the automobile body bottom.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a side view of an electric vehicle according to an embodiment of the present invention, illustrating the assembly of a vehicle body with a front subframe, a battery pack, a subframe reinforcement beam, and a battery pack guard beam;

FIG. 2 is a top view of a vehicle body assembled with a front subframe, a battery pack, a subframe reinforcement beam, and a battery pack guard beam in an embodiment of an electric vehicle according to the present invention;

FIG. 3 is a schematic view of an assembly of a subframe reinforcing beam and a battery pack protecting beam in an embodiment of the electric vehicle according to the present invention;

FIG. 4 is a schematic view of a subframe reinforcement beam in an embodiment of an electric vehicle according to the present invention;

fig. 5 is a schematic diagram of a battery pack protection beam in an embodiment of the electric vehicle according to the present invention.

Description of the reference numerals:

100. a vehicle body; 200. a front subframe; 300. a battery pack; 400. a subframe reinforcing beam; 410. an upper portion; 420. a lower part; 430. a first mounting hole; 440. a third mounting hole; 500. a battery pack protection beam; 510. a recessed portion; 600. an energy absorption cavity; 700. a partition plate; 710. a first separator; 720. a second separator; 730. a third separator.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

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

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

In the use process of the electric automobile, the battery pack mounted at the bottom of the electric automobile is easily impacted under the working condition that the splashed foreign matters impact the chassis at a high speed, the ball impact working condition that the vehicle falls to collide the foreign matters, the supporting bottoms/scratch of the upper and lower ridges of the vehicle, the extrusion/needling working condition that the vehicle overturns to impact the chassis, and the like.

As described in the background art, a conventional battery pack protection structure for an electric vehicle is often a protection device fastened to the bottom of a front subframe of the electric vehicle, and since only one protection device is provided for a rear battery pack, the protection device cannot sufficiently absorb energy of a foreign object impact after receiving the impact of a foreign object from the front, the electric vehicle will slightly empty after the protection device is impacted and will continue to move forward under inertia, and after the protection device passes over the foreign object, the foreign object will directly impact the battery pack behind the protection device, and after the foreign object impacts the battery pack, accidents such as local deformation of the battery pack, pipeline failure, liquid leakage, heat runaway, fire, explosion, and the like are easily caused. The protection performance of the existing battery pack protection structure on a battery pack at the bottom of an electric automobile is poor.

For solving above-mentioned technical problem, this scheme inventor adopts through the rear end fastening connection sub vehicle frame web beam of sub vehicle frame in the front, and the bottom fastening connection battery package protection crossbeam of the automobile body between battery package and preceding sub vehicle frame makes battery package protection crossbeam locate sub vehicle frame web beam's rear, and sub vehicle frame web beam's bottom surface and battery package protection crossbeam's bottom surface all are located the below of the bottom surface of battery package, the second grade protective structure that sets up around sub vehicle frame web beam and the formation of battery package protection crossbeam.

When the bottom of the electric automobile is impacted by foreign matters, the foreign matters impact and fasten the auxiliary frame reinforcing beam connected to the rear end of the front auxiliary frame, the auxiliary frame reinforcing beam protects as a first level, and is deformed by impact crushing, impact force is transmitted to the front auxiliary frame, the first impact is borne together with the front auxiliary frame, the electric automobile can be slightly vacated after being impacted for the first time, and can continue to move ahead under inertia, the battery pack protecting beam which is behind the auxiliary frame reinforcing beam and is fastened and connected with the bottom of the automobile body serves as a second level protection, the second impact of the foreign matters is borne, the energy generated by the second impact is absorbed by the battery pack protecting beam and is transmitted to the automobile body, the impact of the second time is borne together with the whole automobile body, through two-level protection, a large amount of energy generated by impact of the foreign matters is absorbed, the direct impact of the foreign matters on a battery pack at the rear of the battery pack protecting beam can be reduced, and the protection performance on the battery pack is good.

In addition, the auxiliary frame reinforcing beam can also improve the rigidity of the auxiliary frame, and the shock resistance of the front auxiliary frame and the control stability of the electric automobile in the driving process can be improved.

The secondary protection structure adopts the split auxiliary frame reinforcing beam and the battery pack protection beam, the requirement on the size matching precision of assembly is low, the assembly is convenient, the arrangement and the adjustment at the bottom of the vehicle body are facilitated, and the requirements of various different vehicle types can be met.

The electric vehicle provided by the present application is described in detail with reference to specific embodiments.

Fig. 1 is a side view of an assembly of a vehicle body with a front subframe, a battery pack, a subframe reinforcement beam, and a battery pack protection beam in an embodiment of the proposed electric vehicle, and fig. 2 is a top view of an assembly of a vehicle body with a front subframe, a battery pack, a subframe reinforcement beam, and a battery pack protection beam in an embodiment of the proposed electric vehicle.

As shown in fig. 1 and fig. 2, the electric vehicle according to the present embodiment includes: the vehicle body 100, the front subframe 200, the battery pack 300, the subframe reinforcing cross member 400 and the battery pack protective cross member 500.

The front sub-frame 200 and the battery pack 300 are fastened to the bottom of the vehicle body 100, and the front sub-frame 200 is disposed in front of the battery pack 300 at an interval.

The subframe reinforcing cross member 400 is fastened to the rear end of the front subframe 200.

The battery pack protection cross member 500 is fastened to the bottom of the vehicle body 100, and the battery pack protection cross member 500 is disposed between the battery pack 300 and the front sub frame 200 and behind the sub frame reinforcement cross member 400.

The bottom surface of the sub-frame reinforcing beam 400 and the bottom surface of the battery pack protective beam 500 are both located below the bottom surface of the battery pack 300.

In the above embodiment, when the bottom of the electric vehicle is impacted by a foreign object, the foreign object impacts the subframe reinforcing beam 400 fixedly connected to the rear end of the front subframe 200 first, the subframe reinforcing beam 400 is used as a first-stage protection, and is deformed by impact crushing, and transmits impact force to the front subframe 200, and bears first impact together with the front subframe 200, the electric vehicle slightly vacates after being impacted by the first impact, and continues to move forward under inertia, the battery pack protecting beam 500 located behind the subframe reinforcing beam 400 and fixedly connected to the bottom of the vehicle body 100 is used as a second-stage protection, and bears second impact of the foreign object, and the battery pack protecting beam 500 absorbs energy generated by the second impact and transmits the impact force to the vehicle body 100, and bears second impact together with the entire vehicle body 100, through two-stage protection, a large amount of energy of impact of the foreign object is absorbed, so that direct impact of the foreign object on the battery pack 300 behind the battery pack protecting beam 500 can be reduced, and the protection performance of the battery pack 300 is good.

In addition, the subframe reinforcing cross member 400 can also improve the rigidity of the subframe, and can improve the impact resistance of the front subframe 200 and the stability of the electric vehicle in operation during the driving process.

The secondary protection structure adopts the split auxiliary frame reinforcing beam 400 and the battery pack protection beam 500, the size matching precision requirement of assembly is low, the assembly is convenient, the arrangement and the adjustment at the bottom of the vehicle body 100 are facilitated, and the requirements of various different vehicle types can be met.

It is understood that the subframe reinforcing cross member 400 and the battery pack protecting cross member 500 may be connected to each other, or may be independent of each other. The subframe reinforcing cross member 400 may be fastened to the rear end surface of the front subframe 200, or may be fastened to the bottom surface of the rear end of the front subframe 200.

In some examples, the height difference between the bottom surface of the subframe reinforcing beam 400 and the bottom surface of the battery pack 300 is greater than 10cm, and the bottom surface of the battery pack protective beam 500 is not lower than the bottom surface of the subframe reinforcing beam 400. The subframe reinforcing cross member 400 can be ensured to withstand the first impact.

In some possible embodiments, the subframe reinforcing cross member 400 and/or the battery pack protecting cross member 500 are hollow members.

So set up, hollow beam does benefit to and deforms the energy-absorbing after receiving the foreign matter striking, can reduce the height that vacates after sub vehicle frame stiffening beam 400 and/or battery package protection crossbeam 500 and the foreign matter striking, makes the foreign matter and continuously take place to scrape after sub vehicle frame stiffening beam 400 and/or battery package protection crossbeam 500 striking, and the energy-absorbing is effectual.

Fig. 3 is a schematic view of an assembly of a subframe reinforcing beam and a battery pack protection beam in an embodiment of the proposed electric vehicle, fig. 4 is a schematic view of the subframe reinforcing beam in the embodiment of the proposed electric vehicle, and fig. 5 is a schematic view of the battery pack protection beam in the embodiment of the proposed electric vehicle.

As shown in fig. 3-5, and referring to fig. 1 and 2, in some possible embodiments, a partition 700 is disposed in the subframe reinforcing beam 400 and/or the battery pack protecting beam 500, and the inner cavities of the subframe reinforcing beam 400 and/or the battery pack protecting beam 500 are partitioned by the partition 700 disposed therein to form a plurality of energy absorbing cavities 600.

So set up, a plurality of energy-absorbing chamber 600 that form in the hollow beam absorb energy step by step after receiving the striking, and the energy-absorbing is effectual.

In some possible embodiments, the subframe reinforcing cross member 400 includes an upper portion 410 and a lower portion 420, a lower side of the upper portion 410 is fastened to an upper side of the lower portion 420, the partition 700 includes a first partition 710, the first partition 710 is horizontally disposed, the first partition 710 is disposed at a junction of the upper portion 410 and the lower portion 420, an inner cavity of the upper portion 410 and an inner cavity of the lower portion 420 are separated by the first partition 710, and at least one energy absorption cavity 600 is formed in each of the upper portion 410 and the lower portion 420.

So set up, all form by energy-absorbing chamber 600 in sub vehicle frame web beam 400's upper portion 410 and the lower part 420, vertical multistage energy-absorbing structure that forms does benefit to and absorbs vertical energy, does benefit to the height that vacates after reducing sub vehicle frame web beam 400 and the foreign matter striking.

In some possible embodiments, the bulkhead 700 further includes a second bulkhead 720, two ends of the second bulkhead 720 extend in the left-right direction, and the inner cavities of the upper portion 410 and the lower portion 420 are divided by the second bulkhead 720 to form a plurality of energy absorption cavities 600 distributed in the front-back direction.

With the arrangement, a plurality of energy absorption cavities 600 distributed from front to back are formed in the upper portion 410 and the lower portion 420, and the auxiliary frame reinforcing cross beam 400 forms a multi-stage energy absorption structure in the front-rear direction, so that the energy absorption effect on front impact is good. Particularly has good energy absorption and buffering effects on foreign body impact similar to dynamic ball impact or puncture.

In some possible embodiments, the number of energy-absorbing chambers 600 in the upper portion 410 is greater than the number of energy-absorbing chambers 600 in the lower portion 420.

So set up, do benefit to in vertical by supreme energy-absorbing gradually down, guarantee the holistic energy-absorbing effect of sub vehicle frame stiffening beam 400.

In some possible embodiments, the volume of the energy absorption chamber 600 in the lower portion 420 is greater than the volume of the energy absorption chamber 600 in the upper portion 410.

In some possible embodiments, the second partition 720 is vertically disposed.

So set up, the holding power of second baffle 720 is vertical, and vertical energy-absorbing is effectual.

In some possible embodiments, the second partitions 720 in the upper portion 410 are staggered from the second partitions 720 in the lower portion 420.

So set up, can reduce the influence of lower part 420 energy-absorbing deformation to upper portion 410, do benefit to in vertical by supreme energy-absorbing gradually down, guarantee the holistic energy-absorbing effect of sub vehicle frame stiffening beam 400.

In some examples, the upper portion 410, the lower portion 420, the first partition 710, and the second partition 720 are integrally formed.

In some possible embodiments, the subframe reinforcement beam 400 is spaced forward and rearward from the battery pack protection beam 500.

So set up, reserve the space that sub vehicle frame stiffening beam 400 conquassation warp, reduce the sub vehicle frame stiffening beam 400 that takes place deformation to the influence of battery package protection crossbeam 500. And the requirement on the size matching precision of assembly is low, the assembly is convenient, and the arrangement and the adjustment at the bottom of the vehicle body 100 are facilitated.

In some possible embodiments, the rear side of the upper portion 410 is behind the rear side of the lower portion 420, the front side of the battery pack protection cross member 500 is provided with a recess 510 for receiving the rear end of the upper portion 410, the rear end of the upper portion 410 is embedded in the recess 510, and the upper portion 410 and the lower portion 420 are both spaced apart from the battery pack protection cross member 500.

With this arrangement, the rear end of the upper portion 410 can absorb energy and buffer the secondary impact, and the rear end of the upper portion 410 is engaged with the recessed portion 510, so as to improve the protection performance of the secondary protection structure integrally formed by the subframe reinforcing beam 400 and the battery pack protection beam 500.

In some possible embodiments, a plurality of energy absorption cavities 600 are formed in the battery pack shielding beam 500.

So set up, battery package protection crossbeam 500 is vertical to form multistage energy-absorbing structure, does benefit to the absorption to vertical energy.

In some examples, the partition 700 further includes a third partition 730, the third partition 730 is disposed obliquely in front and rear, and the inner cavity of the battery pack protection beam 500 is divided into a plurality of energy absorption cavities 600 by the plurality of third partitions 730.

In some possible embodiments, the subframe reinforcing cross member 400 has a first mounting hole 430 at the top thereof, and the first mounting hole 430 is used to be fastened to the bottom of the rear end of the front subframe 200 by bolts.

So set up, sub vehicle frame stiffening beam 400 easy dismounting does benefit to and changes and adjust.

In some possible embodiments, the front side of the subframe reinforcing cross member 400 is a slope inclined rearward from top to bottom.

With this arrangement, the sub-frame reinforcing cross member 400 can be prevented from affecting the rear end part of the front sub-frame 200.

In some possible embodiments, the battery pack protection cross member 500 is provided with a second mounting hole for fastening with a bolt the front end of the battery pack 300 or the rear end of the front subframe 200, and the battery pack protection cross member 500 is fastened with the vehicle body 100 through the battery pack 300 or the front subframe 200.

With such an arrangement, the battery pack protection cross beam 500 can be mounted on the vehicle body 100 together with the front subframe 200 or the battery pack 300 after being fastened and connected with the front subframe 200 or the battery pack 300, and the battery pack protection cross beam 500 is convenient to disassemble and assemble.

In other examples, the battery pack protection cross member 500 may be directly fastened to the vehicle body 100.

In some possible embodiments, the subframe reinforcing cross member 400 and the battery pack protecting cross member 500 are fastened and connected by a fastener.

For example, the upper side and/or the lower side of the rear end of the subframe reinforcing beam 400 is provided with a third mounting hole 440, and the third mounting hole 440 is fastened and connected with a corresponding mounting hole in the recess 510 of the battery pack protection beam 500 by a bolt, so that the subframe reinforcing beam 400 is fastened and connected with the battery pack protection beam 500. At this time, the recessed portion 510 is engaged with the rear end of the subframe reinforcing beam 400, which facilitates the connection and installation of the subframe reinforcing beam 400 and the battery pack protective beam 500.

In some examples, the subframe reinforcing cross member 400 is made of an aluminum alloy material.

So set up, when having improved preceding sub vehicle frame 200's rigidity, sub vehicle frame web beam 400's energy-absorbing is effectual, light in weight, and the weight gain of whole car is few.

In some examples, the battery pack protection beam 500 is made of an aluminum alloy material.

So set up, the energy-absorbing of battery package protection crossbeam 500 is effectual, light in weight, and the weight increase of whole car is few.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric automobile is characterized by comprising an automobile body, a front auxiliary frame, a battery pack, an auxiliary frame reinforcing cross beam and a battery pack protecting cross beam;

the front auxiliary frame and the battery pack are fixedly connected to the bottom of the vehicle body, and the front auxiliary frame is arranged in front of the battery pack at intervals;

the auxiliary frame reinforcing beam is fixedly connected with the rear end of the front auxiliary frame;

the battery pack protection cross beam is fixedly connected to the bottom of the vehicle body, is arranged between the battery pack and the front auxiliary frame and is positioned behind the auxiliary frame reinforcing cross beam;

the bottom surface of sub vehicle frame stiffening beam with the bottom surface of battery package protection crossbeam all is located the below of the bottom surface of battery package.

2. The electric vehicle according to claim 1, wherein the subframe reinforcing cross member and/or the battery pack protecting cross member is a hollow beam.

3. The electric automobile as claimed in claim 2, wherein a partition is provided in the subframe reinforcing beam and/or the battery pack protecting beam, and an inner cavity of the subframe reinforcing beam and/or the battery pack protecting beam is partitioned by the partition provided therein to form a plurality of energy absorbing cavities.

4. The electric vehicle of claim 3, wherein the subframe reinforcing cross member comprises an upper portion and a lower portion, the lower side of the upper portion is fixedly connected with the upper side of the lower portion, the partition comprises a first partition, the first partition is horizontally disposed, the first partition is disposed at the connection position of the upper portion and the lower portion, the inner cavity of the upper portion and the inner cavity of the lower portion are separated by the first partition, and at least one energy absorption cavity is formed in each of the upper portion and the lower portion.

5. The electric vehicle of claim 4, wherein the partition further comprises a second partition, both ends of the second partition extend in a left-right direction, and the inner cavities of the upper portion and the lower portion are separated by the second partition to form a plurality of energy absorption cavities distributed in a front-back direction.

6. The electric vehicle of claim 5, wherein the number of said energy absorption chambers in said upper portion is greater than the number of said energy absorption chambers in said lower portion;

and/or the volume of the energy-absorbing cavity in the lower portion is greater than the volume of the energy-absorbing cavity in the upper portion.

7. The electric vehicle according to claim 5, wherein the second partition is vertically disposed;

and/or the second baffles in the upper portion are staggered with respect to the second baffles in the lower portion.

8. The electric vehicle of claim 4, wherein the rear side of the upper portion is rearward of the rear side of the lower portion, a recess is provided on the front side of the battery pack protection beam for receiving the rear end of the upper portion, the rear end of the upper portion is embedded in the recess, and the upper portion and the lower portion are both spaced apart from the battery pack protection beam.

9. The electric automobile as claimed in claim 3, wherein a plurality of energy absorption cavities are formed in the battery pack protection beam and distributed up and down.

10. The electric vehicle according to any one of claims 1 to 9, wherein the subframe reinforcing cross member has a first mounting hole at a top portion thereof for fastening connection with a bottom portion of the rear end of the front subframe by means of a bolt;

the front side surface of the auxiliary frame reinforcing beam is an inclined surface inclined backwards from top to bottom;

the battery pack protection cross beam is provided with a second mounting hole, the second mounting hole is used for being connected with the front end of the battery pack or the rear end of the front auxiliary frame in a fastening mode through a bolt, and the battery pack protection cross beam is connected with the vehicle body in a fastening mode through the battery pack or the front auxiliary frame.