CN112406565B

CN112406565B - Impact type battery pack and new energy automobile

Info

Publication number: CN112406565B
Application number: CN202011374538.0A
Authority: CN
Inventors: 黄维; 马鹏堂; 吕占
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2022-02-01
Anticipated expiration: 2040-11-30
Also published as: CN112406565A

Abstract

The invention discloses an impact type battery pack and a new energy automobile, wherein the impact type battery pack comprises: the mounting plate, main battery package and vice battery package, main battery package is fixed to the mounting plate; the auxiliary battery pack is arranged on the mounting plate at the right side of the main battery pack; the first connecting structure is connected with the auxiliary battery pack and the mounting plate and used for disconnecting the connection between the auxiliary battery pack and the mounting plate when the impact type battery pack is impacted from the right to the left. According to the technical scheme, the main battery pack and the auxiliary battery pack are arranged, when the auxiliary battery pack is impacted, the auxiliary battery pack is disconnected from the mounting plate, so that the auxiliary battery pack moves outwards and even is separated from the mounting plate, an intrusion space can be increased for the main battery pack, and the auxiliary battery pack can be effectively prevented from intruding into a vehicle body to cause injury to passengers in the vehicle or the influence of electric shock and battery combustion on the vehicle body caused by the impact of the auxiliary battery pack on the vehicle body is eliminated.

Description

Impact type battery pack and new energy automobile

Technical Field

The invention relates to the technical field of battery packs, in particular to an impact type battery pack and a new energy automobile.

Background

With the development of society, people pay more and more attention to the safety problem of automobiles, and are required to bear strict direct impact and side impact, so that the safety of drivers and passengers is ensured. In the New vehicle collision test (NCAP) evaluation, the rigidity of the passenger compartment has a direct relation with the injury of passengers, the rigidity of the passenger compartment is high, the deformation of the compartment body in the collision is small, the living space of the passengers is ensured, and the injury of the passengers is correspondingly reduced. But the rigidity can not be too strong, and energy absorption can be generated only by sheet metal deformation because certain energy absorption requirements need to be met during collision.

For an electric vehicle, the battery pack under the floor is easily extruded by the intrusion amount caused by side collision and column collision, and the battery pack is unstable even in electric shock and fire due to excessive extrusion. For conventional automobiles, crush deformation caused by impact intrusion is a major source of occupant injury. For electric vehicles, electric shock and battery burning problems caused by damage of a battery pack are prevented, so that collision passive safety performance of the electric vehicles is far lower than that of traditional fuel vehicles.

Disclosure of Invention

The invention mainly aims to provide an impact type battery pack and aims to improve the safety performance of an electric automobile.

In order to achieve the above object, the present invention provides an impact type battery pack, including:

mounting a plate;

a main battery pack fixedly mounted to the mounting plate;

the auxiliary battery pack is arranged on the mounting plate at the right side of the main battery pack; and the number of the first and second groups,

the first connecting structure is used for connecting the auxiliary battery pack with the mounting plate and disconnecting the auxiliary battery pack with the mounting plate when the impact type battery pack is impacted from the right to the left.

Optionally, the bottom end of the auxiliary battery pack extends towards the main battery pack to form an extension section, and the extension section is located below the main battery pack;

the impact type battery pack further comprises a second connecting structure, and the second connecting structure is respectively connected with the extension section of the auxiliary battery pack and the main battery pack so as to disconnect the auxiliary battery pack from the mounting plate when the impact type battery pack is impacted from right to left.

Optionally, the main battery pack and the auxiliary battery pack have two matching surfaces which are oppositely arranged at intervals, and the two matching surfaces are inclined and extend towards the main battery pack gradually in the direction away from the mounting plate.

Optionally, the impact battery pack further comprises a hydraulic pipe, the hydraulic pipe is connected with the auxiliary battery pack and the mounting plate and is located on one side of the first connecting part close to the main battery pack; wherein:

the hydraulic pipe is a flexible pipe; alternatively, the first and second electrodes may be,

the hydraulic pipe is movably arranged along the left-right direction relative to the auxiliary battery pack.

Optionally, the impact type battery pack further comprises a fluid cylinder, and two sides of the fluid cylinder are respectively attached to the two matching surfaces.

Optionally, the impact type battery pack further comprises a fluid plate disposed in the fluid cylinder, one end of the fluid plate extends out of the fluid cylinder to be fixedly mounted on a matching surface of the auxiliary battery pack, and the other end of the fluid plate extends out of the fluid cylinder to be connected with the matching surface of the main battery pack and is movably disposed on the matching surface of the main battery pack.

Optionally, the fluid plate is respectively provided with a plurality of through holes along the inclined direction of the matching surface.

Optionally, the plurality of through-holes comprises at least one overflow hole and at least one extrusion hole;

wherein the diameter of the squeezing hole is smaller than that of the overflowing hole.

Optionally, the inclination angle of the matching surface is 45 ° to 47 °.

In order to achieve the above object, the technical solution of the present application further provides a new energy vehicle, including:

a vehicle body; and the number of the first and second groups,

a crash pack, such as the crash packs described above;

wherein the vehicle body constitutes the mounting plate, or the mounting plate is fixedly mounted to the vehicle body.

According to the technical scheme, the main battery pack and the auxiliary battery pack are arranged, when the auxiliary battery pack is impacted, the auxiliary battery pack is disconnected from the mounting plate, so that the auxiliary battery pack moves outwards and even breaks away from the mounting plate, an intrusion space can be increased for the main battery pack, and the auxiliary battery pack can be effectively prevented from intruding into a vehicle body to cause injury to passengers in the vehicle or eliminate the influence of electric shock and battery combustion on the vehicle body caused by the impact of the auxiliary battery pack on the vehicle body through the sinking of the auxiliary battery pack.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic diagram of an embodiment of a crash-type battery pack according to the present invention;

FIG. 2 is a schematic view of FIG. 1 after a light impact;

FIG. 3 is a schematic illustration of FIG. 1 after a relatively severe impact;

FIG. 4 is a schematic view of the fluidic plate of FIG. 1;

FIG. 5 is a schematic view of the hydraulic tube of FIG. 1;

FIG. 6 is a schematic view showing the relationship between the conditioning mass and the load capacity;

FIG. 7 is a schematic view showing the relationship between the conditioning mass and the load capacity of the hydraulic tubes;

fig. 8 is a schematic diagram of the relationship between the movement distance and the fluid resistance of the fluid cylinder.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Impact type battery pack	10	Mounting plate
20	Main battery bag	30	Auxiliary battery pack
				40	First connecting structure	31	Extension section
50	Second connecting structure	32	Mating surfaces
				60	Hydraulic pipe	70	Fluid cylinder
80	Liquid flowing plate	81	Overflowing hole
				82	Extrusion orifice

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In view of the above, the present invention provides an impact type battery pack 100, and fig. 1 to 3 show an embodiment of the impact type battery pack 100 provided by the present invention, please refer to fig. 1 to 3, wherein the impact type battery pack 100 includes a mounting plate 10, a main battery pack 20, an auxiliary battery pack 30 and a first connecting structure 40, and the main battery pack 20 is fixedly mounted to the mounting plate 10; the auxiliary battery pack 30 is arranged on the mounting plate at the interval of the right side of the main battery pack 20; the first connecting structure 40 connects the secondary battery pack 30 and the mounting plate 10, so as to disconnect the secondary battery pack 30 and the mounting plate 10 when the impact-type battery pack 100 is impacted from right to left.

The left and right in the present application are the left and right in the opposite directions, and the same effects can be achieved by interchanging the left and right directions, and all of them are within the scope of the present application.

In the technical scheme of the invention, by arranging the main battery pack 30 and the auxiliary battery pack 30, when the auxiliary battery pack 30 is impacted, the auxiliary battery pack 30 is disconnected from the mounting plate 10, so that the auxiliary battery pack 30 moves out of the mounting plate 10 and even is separated from the mounting plate 10, so that an intrusion space can be added for the main battery pack 20, and by sinking the auxiliary battery pack 30, the auxiliary battery pack 30 can be effectively prevented from intruding into a vehicle body to cause injury to passengers in the vehicle, or the influence of electric shock and battery combustion caused by impact of the auxiliary battery pack 30 on the vehicle body can be eliminated, in addition, the auxiliary battery pack 30 can be arranged at a place where the vehicle body cannot be originally provided with the battery pack, so that the cruising ability of a new energy vehicle is improved.

Further, in order to prevent the sub-battery pack 30 from sinking or even falling off due to a little impact, the bottom end of the sub-battery pack 30 extends towards the main battery pack 20 to form an extension section 31, and the extension section 31 is located below the main battery pack 20; the impact type battery pack 100 further includes a second connecting structure 50, and the second connecting structure 50 is respectively connected to the extension 31 of the auxiliary battery pack 30 and the main battery pack 20, so as to disconnect the auxiliary battery pack 30 from the mounting plate 10 when the impact type battery pack 100 is impacted from the right to the left direction. It is required that the sub-battery pack 30 starts a sinking motion after both the first and

second connection structures

40 and 50 are broken.

It should be noted that the form of the first connecting structure 40 and the second connecting structure 50 may be various, and may be a bayonet structure, a screw structure, or a clamping structure, and is not limited herein.

After the auxiliary battery pack 30 is impacted, the movement direction of the auxiliary battery pack 30 is inclined downward, so that in order to prevent the auxiliary battery pack 30 from moving and impacting the main battery pack 20, the main battery pack 20 and the auxiliary battery pack 30 are provided with two matching surfaces 32 which are arranged at opposite intervals, the two matching surfaces 32 are inclined and extended towards the main battery pack 20 gradually in the direction away from the mounting plate 10, so that the two matching surfaces 32 are inclined, and the movement of the auxiliary battery pack 30 can be effectively prevented from influencing the main battery pack 20.

Further, the inclination angle of the fitting surface 32 with the horizontal plane will also affect the effect of collision, and according to multiple experiments, when the inclination angle of the fitting surface 32 is 45 ° to 47 °, the impact type battery pack 100 can achieve the optimal safety performance, and can achieve the safety performance of the national standard 5 star standard and above.

Still further, referring to fig. 1 to 5, in order to prevent the secondary battery pack 30 from falling off the vehicle body by a little impact, thereby causing irreversible damage and increasing the cost of the user, the impact type battery pack 100 further includes a hydraulic pipe 60, wherein the hydraulic pipe 60 connects the secondary battery pack 30 and the mounting plate 10 and is located at a side of the first connecting portion close to the primary battery pack 20; so that after the first connection structure 40 and the second connection structure 50 are broken, the hydraulic pipe 60 can provide an upward pulling force to the secondary battery pack 30 to slow down the sinking movement of the secondary battery pack 30, wherein the hydraulic pipe 60 may be a flexible pipe, which is not ideal, and in the case of a severe impact, the hydraulic pipe 60 may also be broken to contact the constraint of the secondary battery pack 30 and continue sinking until being disengaged, but the hydraulic pipe 60 may also be another material, such as a steel pipe, in which case the hydraulic pipe 60 may be movably disposed in the left-right direction with respect to the secondary battery pack 30, and the left-right disposed specific form may be a left-right mounting groove or a mounting channel, which is not limited herein, and in addition, the inside of the hydraulic pipe 60 is used for allowing the movement in the vehicle body to pass, in a normal state, the piston may move downward to confine the sub-battery pack 30 to prevent its movement, and after the impact, the sub-battery pack 30 moves downward relative to the piston to release the confinement of the sub-battery pack 30 by the piston.

Since the secondary battery pack 30 once falls off from the vehicle body, the whole process is irreversible, the whole secondary battery pack 30 is directly scrapped, and in order not to increase the cost for the user, the secondary battery pack 30 only needs to be separated when the impact is severe, generally, the secondary battery pack 30 sinks, after the first connecting structure 40 and the second connecting structure 50 are broken, only the first connecting structure and the second connecting structure need to be replaced, the cost is low, and the whole battery pack may need to be replaced once the secondary battery pack 30 is separated, the cost is high, so that a strong support is needed, and the battery pack is prevented from being separated when the impact is not severe.

At this time, the fluid cylinder 70 may be used, two sides of the fluid cylinder 70 are respectively attached to the two mating surfaces 32, the fluid cylinder 70 may bear a large force parallel to the inclined surface, but may not bear a force perpendicular to the inclined surface, so that the hydraulic tube 60 may provide an upward pulling force to the secondary battery pack 30, the fluid cylinder 70 may support the secondary battery pack 30 to a certain extent, and after the hydraulic tube 60 is broken, the fluid cylinder 70 may be torn, and the secondary battery pack 30 may be detached from the vehicle body.

The angle of the inclined surface affects the pressure that the fluid cylinder 70 can share, and the inclination angle at the mating surface 32 is 45 ° to 47 °, and the sharing effect of the fluid cylinder 70 is the best.

In addition, referring to fig. 1 to 4, a liquid with a certain viscosity flows in the fluid cylinder 70, and flows out of the fluid cylinder 70 to the mating surface 32 fixedly mounted on the secondary battery pack 30, and the other end of the fluid plate 80 extends out of the fluid cylinder 70 to the mating surface 32 connected to the primary battery pack 20, and is movably disposed on the mating surface 32 of the primary battery pack 20, so that when the secondary battery pack 30 moves, the fluid plate 80 moves along with the secondary battery pack 30, and the liquid passes through the fluid plate 80 to generate a resistance force, which is converted into a bearing force of the secondary battery pack 30 on impact intrusion. Specifically, the fluid plate 80 is respectively provided with a plurality of through holes penetrating in an oblique direction of the mating surface 32 to generate resistance when the fluid passes through the through holes.

Further to enhance the effect of the resistance, the plurality of through holes include at least one overflowing hole 81 and at least one extruding hole 82; wherein the diameter of the squeezing hole 82 is smaller than that of the overflowing hole 81, so that the liquid generates squeezing effect at the squeezing hole 82, thereby increasing the resistance, preferably, in the embodiment, five squeezing holes 81 are provided, and four squeezing holes 82 are provided, so that the resistance of the hydraulic plate to the secondary battery pack 30 is optimized.

Specifically, the liquid oil inside the fluid cylinder 70 has a certain viscosity and a certain movement resistance, and during the movement, the friction temperature thereof is increased, and the viscosity performance is reduced. The squeeze flow generated by the fluid plate 80 can continuously increase the moving resistance during the movement, so as to ensure that the bearing capacity of the fluid cylinder 70 keeps balanced or slightly increased along with the movement during the work, and the relationship between the movement distance of the secondary battery pack 30 and the resistance of the fluid cylinder can be referred to as fig. 8, wherein the abscissa of fig. 8 is in kg, and the ordinate is in mm.

When the first connection 40 and the second connection 50 are bayonet locks, there is a certain relation between the different servicing masses and the pressure of the bayonet locks, for which reference can be made to fig. 6, in which the abscissa of fig. 6 is in kg and the ordinate KN.

For electric vehicles with different conditioning masses, a certain relationship between the conditioning mass and the pressure at which the hydraulic line 60 operates can be seen in fig. 7, in which the abscissa of fig. 7 is in kg and the ordinate KN is in kg.

In order to achieve the above object, the present application also provides a new energy vehicle, including: a vehicle body and a crash battery pack 100, wherein the crash battery pack 100 is a crash battery pack 100 as described above; the vehicle body constitutes the mounting plate 10, or the mounting plate 10 is fixedly mounted to the vehicle body.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An impact battery pack, comprising:

mounting a plate;

a main battery pack fixedly mounted to the mounting plate;

a first connecting structure connecting the sub-battery pack and the mounting plate for disconnecting the sub-battery pack from the mounting plate when the impact-type battery pack is impacted from the right to the left;

the bottom end of the auxiliary battery pack extends towards the main battery pack to form an extension section, and the extension section is positioned below the main battery pack;

the impact type battery pack further comprises a second connecting structure, and the second connecting structure is respectively connected to the extension section of the auxiliary battery pack and the main battery pack so as to disconnect the auxiliary battery pack from the mounting plate when the impact type battery pack is impacted from right to left;

the main battery pack and the auxiliary battery pack are provided with two matching surfaces which are oppositely arranged at intervals, and the two matching surfaces are inclined and extend towards the direction of the main battery pack gradually in the direction away from the mounting plate;

the impact type battery pack further comprises a fluid cylinder, and two sides of the fluid cylinder are respectively attached to the two matching surfaces;

the impact type battery pack further comprises a fluid plate arranged in the fluid cylinder, one end of the fluid plate extends out of the fluid cylinder and is fixedly installed on the matching surface of the auxiliary battery pack, the other end of the fluid plate extends out of the fluid cylinder and is connected with the matching surface of the main battery pack, and the matching surface of the main battery pack can be movably arranged.

2. The impact battery pack according to claim 1, further comprising a hydraulic pipe connecting the sub-battery pack and the mounting plate and located at a side of the first connection part adjacent to the main battery pack; wherein:

3. The impact battery pack according to claim 1, wherein the fluid plate has a plurality of through holes formed therethrough in a direction in which the mating surface is inclined.

4. The impact package of claim 3, wherein the plurality of through-holes comprises at least one overflow hole and at least one squish hole;

5. The impact battery pack of claim 1, wherein the mating surface is inclined at an angle of 45 ° to 47 °.

6. A new energy automobile is characterized by comprising:

a vehicle body; and the number of the first and second groups,

a crash pack, the crash pack of any one of claims 1 to 5;